SettingsLast update:
| Time UTC | DSCOVR | ACE | ||||
|---|---|---|---|---|---|---|
| Solar Wind | GSM | Solar Wind | GSM | |||
| Proton Density | Bulk Speed | Bz | Proton Density | Bulk Speed | Bz | |
| 07:50 | - | - | - | - | - | - |
| 07:49 | - | - | - | - | - | - |
| 07:48 | - | - | - | - | - | - |
| 07:47 | - | - | - | - | - | - |
| 07:46 | - | - | - | - | - | - |
| 07:45 | - | - | - | - | - | - |
| 07:44 | - | - | - | - | - | - |
| 07:43 | - | - | - | - | - | - |
| 07:42 | - | - | - | - | - | - |
| 07:41 | - | - | - | - | - | - |
| 07:40 | - | - | - | - | - | - |
| 07:39 | - | - | - | - | - | - |
| 07:38 | - | - | - | - | - | - |
| 07:37 | - | - | - | - | - | - |
| 07:36 | - | - | - | - | - | - |
| 07:35 | - | - | - | - | - | - |
| 07:34 | - | - | - | - | - | - |
| 07:33 | - | - | - | - | - | - |
| 07:32 | - | - | - | - | - | - |
| 07:31 | - | - | - | - | - | - |
| 07:30 | - | - | - | - | - | - |
| 07:29 | - | - | - | - | - | - |
| 07:28 | - | - | - | - | - | - |
| 07:27 | - | - | - | - | - | - |
| 07:26 | - | - | - | - | - | - |
| 07:25 | - | - | - | - | - | - |
| 07:24 | - | - | - | - | - | - |
| 07:23 | - | - | - | - | - | - |
| 07:22 | - | - | - | - | - | - |
| 07:21 | - | - | - | - | - | - |
| 07:20 | - | - | - | - | - | - |
| 07:19 | - | - | - | - | - | - |
| 07:18 | - | - | - | - | - | - |
| 07:17 | - | - | - | - | - | - |
| 07:16 | - | - | -5.92 | - | - | -5.9 |
| 07:15 | 2.06 | 518.3 | -5.80 | 2.1 | 518.3 | -5.8 |
| 07:14 | 1.49 | 520.3 | -6.36 | 1.5 | 520.3 | -6.4 |
| 07:13 | 2.11 | 516.2 | -5.98 | 2.1 | 516.2 | -6.0 |
| 07:12 | 2.39 | 514.6 | -5.07 | 2.4 | 514.6 | -5.1 |
| 07:11 | 1.29 | 515.9 | -5.31 | 1.3 | 515.9 | -5.3 |
| 07:10 | 1.73 | 514.7 | -5.55 | 1.7 | 514.7 | -5.6 |
| 07:09 | 1.98 | 516.3 | -4.88 | 2.0 | 516.3 | -4.9 |
| 07:08 | 2.06 | 515.0 | -4.98 | 2.1 | 515.0 | -5.0 |
| 07:07 | 2.31 | 509.6 | -4.27 | 2.3 | 509.6 | -4.3 |
| 07:06 | 2.13 | 512.8 | -4.84 | 2.1 | 512.8 | -4.8 |
| 07:05 | 2.11 | 517.6 | -4.86 | 2.1 | 517.6 | -4.9 |
| 07:04 | 2.17 | 520.5 | -4.32 | 2.2 | 520.5 | -4.3 |
| 07:03 | 2.82 | 513.9 | -3.47 | 2.8 | 513.9 | -3.5 |
| 07:02 | 2.44 | 513.3 | -2.92 | 2.4 | 513.3 | -2.9 |
| 07:01 | 2.71 | 510.4 | -3.27 | 2.7 | 510.4 | -3.3 |
| 07:00 | 2.54 | 517.6 | -1.41 | 2.5 | 517.6 | -1.4 |
| 06:59 | 2.71 | 518.1 | -0.36 | - | - | -0.4 |
| 06:58 | 1.49 | 527.5 | -0.01 | 1.5 | 527.5 | -0.0 |
| 06:57 | 0.88 | 539.3 | -6.87 | 0.9 | 539.3 | -6.9 |
| 06:56 | 0.51 | 532.3 | -6.99 | 0.5 | 532.3 | -7.0 |
| 06:55 | 0.41 | 524.6 | -6.63 | 0.4 | 524.6 | -6.6 |
| 06:54 | 0.80 | 520.1 | -7.42 | 0.8 | 520.1 | -7.4 |
| 06:53 | 1.24 | 520.2 | -6.81 | 1.2 | 520.2 | -6.8 |
| 06:52 | 1.41 | 524.7 | -6.51 | 1.4 | 524.7 | -6.5 |
| 06:51 | 1.44 | 526.6 | -6.22 | 1.4 | 526.6 | -6.2 |
| 06:50 | 1.41 | 524.2 | -6.21 | 1.4 | 524.2 | -6.2 |
| 06:49 | 1.44 | 523.5 | -5.89 | 1.4 | 523.5 | -5.9 |
| 06:48 | 1.40 | 529.1 | -5.79 | 1.4 | 529.1 | -5.8 |
| 06:47 | 1.51 | 523.1 | -5.22 | 1.5 | 523.1 | -5.2 |
| 06:46 | 1.34 | 524.7 | -5.60 | 1.3 | 524.7 | -5.6 |
| 06:45 | 0.63 | 537.5 | -4.88 | 0.6 | 537.5 | -4.9 |
| 06:44 | 2.14 | 520.7 | -3.74 | 2.1 | 520.7 | -3.7 |
| 06:43 | 1.49 | 527.1 | -3.92 | 1.5 | 527.1 | -3.9 |
| 06:42 | 1.68 | 523.2 | -4.27 | 1.7 | 523.2 | -4.3 |
| 06:41 | 1.70 | 521.9 | -3.25 | 1.7 | 521.9 | -3.2 |
| 06:40 | 1.72 | 522.7 | -2.59 | 1.7 | 522.7 | -2.6 |
| 06:39 | 1.75 | 523.0 | -2.96 | 1.7 | 523.0 | -3.0 |
| 06:38 | 1.80 | 525.7 | -2.27 | 1.8 | 525.7 | -2.3 |
| 06:37 | 1.77 | 524.0 | -3.32 | 1.8 | 524.0 | -3.3 |
| 06:36 | 1.90 | 521.4 | -1.63 | 1.9 | 521.4 | -1.6 |
| 06:35 | 2.14 | 519.0 | -1.08 | 2.1 | 519.0 | -1.1 |
| 06:34 | 2.11 | 517.9 | -1.93 | 2.1 | 517.9 | -1.9 |
| 06:33 | 1.89 | 524.8 | -1.14 | 1.9 | 524.8 | -1.1 |
| 06:32 | 1.32 | 533.7 | -3.31 | 1.3 | 533.7 | -3.3 |
| 06:31 | 1.35 | 532.5 | -5.10 | 1.4 | 532.5 | -5.1 |
| 06:30 | 1.47 | 503.6 | -5.08 | 1.5 | 503.6 | -5.1 |
| 06:29 | 1.57 | 514.3 | -1.89 | 1.6 | 514.3 | -1.9 |
| 06:28 | 1.95 | 526.5 | 0.82 | 1.9 | 526.5 | 0.8 |
| 06:27 | 1.97 | 525.0 | 2.19 | 2.0 | 525.0 | 2.2 |
| 06:26 | 2.01 | 526.3 | 2.93 | 2.0 | 526.3 | 2.9 |
| 06:25 | 1.89 | 528.8 | 2.47 | 1.9 | 528.8 | 2.5 |
| 06:24 | 1.02 | 544.0 | 2.76 | 1.0 | 544.0 | 2.8 |
| 06:23 | 0.54 | 535.2 | -4.74 | 0.5 | 535.2 | -4.7 |
| 06:22 | 0.98 | 529.4 | -5.16 | 1.0 | 529.4 | -5.2 |
| 06:21 | 1.11 | 536.1 | -5.06 | 1.1 | 536.1 | -5.1 |
| 06:20 | 1.56 | 536.7 | -5.09 | 1.6 | 536.7 | -5.1 |
| 06:19 | 2.32 | 534.6 | -1.93 | 2.3 | 534.6 | -1.9 |
| 06:18 | 1.54 | 536.6 | -3.18 | 1.5 | 536.6 | -3.2 |
| 06:17 | 1.67 | 536.3 | -3.00 | 1.7 | 536.3 | -3.0 |
| 06:16 | 1.47 | 541.3 | -3.66 | 1.5 | 541.3 | -3.7 |
| 06:15 | 1.20 | 553.3 | -4.18 | 1.2 | 553.3 | -4.2 |
| 06:14 | 0.83 | 542.4 | -4.50 | 0.8 | 542.4 | -4.5 |
| 06:13 | 0.93 | 549.1 | -4.83 | 0.9 | 549.1 | -4.8 |
| 06:12 | 0.97 | 542.6 | -4.93 | 1.0 | 542.6 | -4.9 |
| 06:11 | 1.51 | 536.6 | -4.97 | 1.5 | 536.6 | -5.0 |
| 06:10 | 1.53 | 534.6 | -4.77 | 1.5 | 534.6 | -4.8 |
| 06:09 | 1.10 | 546.1 | -4.92 | 1.1 | 546.1 | -4.9 |
| 06:08 | 0.66 | 533.6 | -4.89 | 0.7 | 533.6 | -4.9 |
| 06:07 | 0.54 | 513.4 | -5.37 | 0.5 | 513.4 | -5.4 |
| 06:06 | 0.55 | 505.5 | -3.21 | 0.6 | 505.5 | -3.2 |
| 06:05 | 2.44 | 517.0 | 0.27 | 2.4 | 517.0 | 0.3 |
| 06:04 | 2.66 | 513.9 | 2.53 | 2.7 | 513.9 | 2.5 |
| 06:03 | 3.12 | 512.0 | 2.18 | 3.1 | 512.0 | 2.2 |
| 06:02 | 3.40 | 521.9 | 3.50 | 3.4 | 521.9 | 3.5 |
| 06:01 | 3.12 | 529.4 | 4.44 | 3.1 | 529.4 | 4.4 |
| 06:00 | 1.90 | 513.5 | 1.34 | 1.9 | 513.5 | 1.3 |
| 05:59 | 2.17 | 518.3 | -0.84 | 2.2 | 518.3 | -0.8 |
| 05:58 | 2.12 | 517.0 | -0.82 | 2.1 | 517.0 | -0.8 |
| 05:57 | 2.14 | 510.5 | -0.67 | 2.1 | 510.5 | -0.7 |
| 05:56 | 2.42 | 510.1 | -0.03 | 2.4 | 510.1 | -0.0 |
| 05:55 | 2.49 | 511.7 | 0.22 | 2.5 | 511.7 | 0.2 |
| 05:54 | 2.69 | 513.4 | 0.55 | 2.7 | 513.4 | 0.6 |
| 05:53 | 2.69 | 513.3 | 0.90 | 2.7 | 513.3 | 0.9 |
| 05:52 | 2.84 | 510.9 | 1.58 | 2.8 | 510.9 | 1.6 |
| 05:51 | 2.98 | 511.3 | 1.91 | 3.0 | 511.3 | 1.9 |
Built 2026-01-23 07:51 from source
No recent solar wind parameters by NOAA available.
Forecast cannot be given.
| Geomagnetic activity (RX [nT]) | ||
|---|---|---|
| site | latest hour | next hour (RXmin, RXmax) |
| Kevo (KEV) | 128 | - | - |
| Maasi (MAS) | 130 | - | - |
| Kilpisjärvi (KIL) | 142 | - | - |
| Ivalo (IVA) | 128 | - | - |
| Muonio (MUO) | 129 | - | - |
| Sodankylä (SOD) | 77 | - | - |
| Pello (PEL) | 62 | - | - |
| Oulujärvi (OUJ) | 27 | - | - |
| Mekrijärvi (MEK) | 17 | - | - |
| Hankasalmi (HAN) | 12 | - | - |
| Nurmijärvi (NUR) | - | - | - |
| Tartu (TAR) | 16 | - | - |
| low | increased | moderate | high | very high |
Short explanation of the method
AurorasNow! (Finnish Meteorological Institute)Built 2026-01-23 07:47 from source
Issue Time: 2026-01-23 04:59 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3607
Begin Time: 2026-01-21 09:50 UTC
Yesterday Maximum 2MeV Flux: 5365 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3607
Begin Time: 2026-01-21 09:50 UTC
Yesterday Maximum 2MeV Flux: 5365 pfu
Issue Time: 2026-01-23 00:00 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5230
Valid From: 2026-01-22 22:24 UTC
Now Valid Until: 2026-01-23 15:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5230
Valid From: 2026-01-22 22:24 UTC
Now Valid Until: 2026-01-23 15:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2026-01-22 23:39 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026-01-22 23:39 UTC
Valid To: 2026-01-23 09:00 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026-01-22 23:39 UTC
Valid To: 2026-01-23 09:00 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-22 23:29 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-22 23:27 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-22 23:27 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-22 23:25 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026-01-22 23:25 UTC
Valid To: 2026-01-23 09:00 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026-01-22 23:25 UTC
Valid To: 2026-01-23 09:00 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-22 23:00 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026-01-22 22:54 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026-01-22 22:54 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2026-01-22 22:24 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026-01-22 22:24 UTC
Valid To: 2026-01-23 09:00 UTC
Warning Condition: Onset
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026-01-22 22:24 UTC
Valid To: 2026-01-23 09:00 UTC
Warning Condition: Onset
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2026-01-22 17:54 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026-01-18 22:55 UTC
Maximum Time: 2026-01-19 19:15 UTC
End Time: 2026-01-22 05:45 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026-01-18 22:55 UTC
Maximum Time: 2026-01-19 19:15 UTC
End Time: 2026-01-22 05:45 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
Issue Time: 2026-01-22 11:03 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 622
Valid From: 2026-01-22 01:24 UTC
Now Valid Until: 2026-01-22 18:00 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 622
Valid From: 2026-01-22 01:24 UTC
Now Valid Until: 2026-01-22 18:00 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
Issue Time: 2026-01-22 05:37 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026-01-22 05:20 UTC
NOAA Scale: S1 - Minor
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026-01-22 05:20 UTC
NOAA Scale: S1 - Minor
Issue Time: 2026-01-22 04:59 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3606
Begin Time: 2026-01-21 09:50 UTC
Yesterday Maximum 2MeV Flux: 3332 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3606
Begin Time: 2026-01-21 09:50 UTC
Yesterday Maximum 2MeV Flux: 3332 pfu
Issue Time: 2026-01-22 01:24 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2026-01-22 01:24 UTC
Valid To: 2026-01-22 12:00 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2026-01-22 01:24 UTC
Valid To: 2026-01-22 12:00 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
Issue Time: 2026-01-21 10:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5228
Valid From: 2026-01-16 02:54 UTC
Now Valid Until: 2026-01-22 18:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5228
Valid From: 2026-01-16 02:54 UTC
Now Valid Until: 2026-01-22 18:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2026-01-21 10:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2177
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-22 15:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2177
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-22 15:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-21 10:56 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 636
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 23:59 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 636
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 23:59 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 10:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 143
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 18:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 143
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 18:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-21 10:37 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 10:37 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 10:37 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 10:06 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026-01-21 09:50 UTC
Station: GOES19
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026-01-21 09:50 UTC
Station: GOES19
Issue Time: 2026-01-21 09:48 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 09:48 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 09:48 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-21 08:53 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 08:52 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 08:52 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-21 07:31 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day
Jan 22: G1 (Minor) Jan 23: None (Below G1) Jan 24: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day
Jan 22: G1 (Minor) Jan 23: None (Below G1) Jan 24: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-21 07:27 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 07:23 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 07:23 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 07:10 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 07:04 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 07:04 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-21 05:11 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 05:07 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 05:07 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-21 04:47 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 04:39 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 04:39 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 03:54 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 03:49 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 03:49 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-21 02:20 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 02:13 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-21 02:13 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-21 02:01 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5227
Valid From: 2026-01-16 02:54 UTC
Now Valid Until: 2026-01-21 21:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5227
Valid From: 2026-01-16 02:54 UTC
Now Valid Until: 2026-01-21 21:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2026-01-21 02:01 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2176
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 18:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2176
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 18:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-21 02:01 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 142
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 12:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 142
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 12:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-21 02:01 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 635
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 15:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 635
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 15:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 01:55 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2026-01-19 04:40 UTC
Maximum Time: 2026-01-19 19:15 UTC
End Time: 2026-01-20 13:35 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2026-01-19 04:40 UTC
Maximum Time: 2026-01-19 19:15 UTC
End Time: 2026-01-20 13:35 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
Issue Time: 2026-01-21 00:35 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 00:32 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-21 00:32 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-21 00:28 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 00:13 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-21 00:13 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-21 00:08 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026-01-20 23:59 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026-01-20 23:59 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
Issue Time: 2026-01-20 23:55 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 620
Valid From: 2026-01-18 21:30 UTC
Now Valid Until: 2026-01-21 23:59 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 620
Valid From: 2026-01-18 21:30 UTC
Now Valid Until: 2026-01-21 23:59 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
Issue Time: 2026-01-20 22:42 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 22:43 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 22:43 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-20 22:33 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 22:30 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 22:30 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-20 21:35 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 21:34 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 21:34 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-20 19:53 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 634
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 06:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 634
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 06:00 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-20 19:53 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 141
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 03:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 141
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 03:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-20 19:53 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5226
Valid From: 2026-01-16 02:54 UTC
Now Valid Until: 2026-01-21 15:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5226
Valid From: 2026-01-16 02:54 UTC
Now Valid Until: 2026-01-21 15:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2026-01-20 19:53 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2175
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 09:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2175
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-21 09:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-20 19:49 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 19:45 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 19:45 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-20 18:56 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 18:52 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 18:52 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-20 18:23 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 18:18 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 18:18 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-20 17:27 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 17:24 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 17:24 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-20 15:30 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 15:23 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 15:23 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-20 15:19 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 15:13 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 15:13 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-20 14:56 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 140
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-20 21:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 140
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-20 21:00 UTC
Warning Condition: Persistence
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-20 14:56 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 633
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-20 23:59 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 633
Valid From: 2026-01-19 19:02 UTC
Now Valid Until: 2026-01-20 23:59 UTC
Warning Condition: Persistence
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-20 12:48 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 12:47 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 12:47 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-20 12:29 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 12:29 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 12:29 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-20 12:11 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 12:10 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 12:10 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-20 10:22 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026-01-20 10:21 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026-01-20 10:21 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
Issue Time: 2026-01-20 09:43 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 09:43 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 09:43 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-20 09:28 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 09:27 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 09:27 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-20 09:17 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 09:17 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 09:17 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-20 08:23 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026-01-20 08:23 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026-01-20 08:23 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
Issue Time: 2026-01-20 08:00 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 07:52 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-01-20 07:52 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Issue Time: 2026-01-20 07:36 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 07:30 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 07:30 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Issue Time: 2026-01-20 07:05 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 06:58 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-01-20 06:58 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Issue Time: 2026-01-20 06:03 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 05:59 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-01-20 05:59 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Built 2026-01-23 05:09 from source
