SettingsLast update:
| Time UTC | DSCOVR | ACE | ||||
|---|---|---|---|---|---|---|
| Solar Wind | GSM | Solar Wind | GSM | |||
| Proton Density | Bulk Speed | Bz | Proton Density | Bulk Speed | Bz | |
| 18:55 | - | - | - | - | - | - |
| 18:54 | 0.14 | 455.6 | - | - | - | - |
| 18:53 | 0.14 | 453.1 | 8.47 | - | - | - |
| 18:52 | 0.15 | 455.9 | 8.66 | - | - | - |
| 18:51 | 0.15 | 455.5 | 8.70 | - | - | - |
| 18:50 | 0.06 | 434.1 | 8.80 | - | - | - |
| 18:49 | 0.13 | 459.2 | 9.00 | - | - | - |
| 18:48 | 0.12 | 460.0 | 8.87 | - | - | - |
| 18:47 | 0.15 | 467.8 | 8.79 | 0.2 | 467.8 | 8.8 |
| 18:46 | 0.10 | 452.6 | 9.70 | 0.1 | 452.6 | 9.7 |
| 18:45 | 0.03 | 450.2 | 9.66 | 0.0 | 450.2 | 9.7 |
| 18:44 | 0.03 | 457.1 | 9.58 | 0.0 | 457.1 | 9.6 |
| 18:43 | 0.05 | 439.2 | 8.89 | 0.0 | 439.2 | 8.9 |
| 18:42 | 0.03 | 444.0 | 9.80 | 0.0 | 444.0 | 9.8 |
| 18:41 | 0.02 | 448.3 | 8.05 | 0.0 | 448.3 | 8.0 |
| 18:40 | 0.06 | 454.6 | 7.74 | 0.1 | 454.6 | 7.7 |
| 18:39 | 0.11 | 463.2 | 7.84 | 0.1 | 463.2 | 7.8 |
| 18:38 | 0.13 | 463.2 | 7.73 | 0.1 | 463.2 | 7.7 |
| 18:37 | 0.17 | 467.9 | 7.57 | 0.2 | 467.9 | 7.6 |
| 18:36 | 0.13 | 464.1 | 7.38 | 0.1 | 464.1 | 7.4 |
| 18:35 | 0.05 | 454.5 | 7.58 | 0.0 | 454.5 | 7.6 |
| 18:34 | 0.08 | 464.2 | 7.56 | 0.1 | 464.2 | 7.6 |
| 18:33 | 0.11 | 464.6 | 7.42 | 0.1 | 464.6 | 7.4 |
| 18:32 | 0.09 | 465.0 | - | 0.1 | 466.3 | - |
| 18:31 | 0.13 | 467.0 | 7.01 | 0.1 | 467.0 | 7.0 |
| 18:30 | 0.14 | 474.4 | 6.88 | 0.1 | 474.4 | 6.9 |
| 18:29 | 0.17 | 477.0 | 6.29 | 0.2 | 477.0 | 6.3 |
| 18:28 | 0.12 | 464.7 | 5.88 | 0.1 | 464.7 | 5.9 |
| 18:27 | 0.16 | 467.5 | 6.30 | 0.2 | 467.5 | 6.3 |
| 18:26 | 0.20 | 458.5 | 6.95 | 0.2 | 458.5 | 7.0 |
| 18:25 | - | - | 7.27 | - | - | 7.3 |
| 18:24 | - | - | 6.30 | - | - | 6.3 |
| 18:23 | 0.61 | 464.3 | 5.86 | 0.6 | 464.3 | 5.9 |
| 18:22 | 0.50 | 470.2 | 6.32 | 0.5 | 470.2 | 6.3 |
| 18:21 | 0.29 | 479.8 | 5.87 | 0.3 | 479.8 | 5.9 |
| 18:20 | 0.30 | 477.1 | 5.75 | 0.3 | 477.1 | 5.7 |
| 18:19 | 0.29 | 477.1 | 5.95 | 0.3 | 477.1 | 6.0 |
| 18:18 | 0.19 | 468.1 | 6.19 | 0.2 | 468.1 | 6.2 |
| 18:17 | 0.15 | 464.2 | 5.64 | 0.2 | 464.2 | 5.6 |
| 18:16 | 0.15 | 459.4 | 3.73 | 0.2 | 459.4 | 3.7 |
| 18:15 | 0.15 | 472.4 | 3.48 | 0.2 | 472.4 | 3.5 |
| 18:14 | 0.15 | 478.1 | 3.69 | 0.1 | 478.1 | 3.7 |
| 18:13 | 0.12 | 454.9 | 3.93 | 0.1 | 454.9 | 3.9 |
| 18:12 | 0.15 | 465.4 | 4.64 | 0.1 | 465.4 | 4.6 |
| 18:11 | 0.14 | 478.0 | 5.11 | 0.1 | 478.0 | 5.1 |
| 18:10 | 0.14 | 472.8 | 6.02 | 0.1 | 472.8 | 6.0 |
| 18:09 | 0.25 | 469.7 | 6.67 | 0.2 | 469.7 | 6.7 |
| 18:08 | 0.30 | 479.1 | 6.78 | 0.3 | 479.1 | 6.8 |
| 18:07 | 0.21 | 486.1 | 6.65 | 0.2 | 486.1 | 6.7 |
| 18:06 | 0.11 | 461.9 | 6.44 | 0.1 | 461.9 | 6.4 |
| 18:05 | 0.07 | 432.0 | 5.80 | 0.1 | 432.0 | 5.8 |
| 18:04 | 0.13 | 465.2 | 4.61 | 0.1 | 465.2 | 4.6 |
| 18:03 | 0.02 | 475.0 | 4.77 | 0.0 | 475.0 | 4.8 |
| 18:02 | 0.03 | 498.4 | 5.77 | 0.0 | 498.4 | 5.8 |
| 18:01 | 0.02 | 478.6 | 5.12 | 0.0 | 478.7 | 5.1 |
| 18:00 | 0.03 | 481.0 | 4.98 | 0.0 | 484.1 | 5.0 |
| 17:59 | 0.02 | 479.8 | 5.15 | 0.0 | 474.6 | 5.2 |
| 17:58 | 0.02 | 479.7 | 4.77 | 0.0 | 487.3 | 4.8 |
| 17:57 | 0.01 | 480.4 | 4.78 | 0.0 | 480.4 | 4.8 |
| 17:56 | 0.01 | 477.2 | 3.94 | 0.0 | 477.2 | 3.9 |
| 17:55 | 0.02 | 494.1 | 2.63 | 0.0 | 494.1 | 2.6 |
| 17:54 | 0.02 | 484.7 | 3.92 | 0.0 | 484.7 | 3.9 |
| 17:53 | 0.02 | 475.6 | 3.83 | 0.0 | 475.6 | 3.8 |
| 17:52 | 0.02 | 478.0 | 4.02 | 0.0 | 478.0 | 4.0 |
| 17:51 | 0.01 | 479.2 | 4.08 | 0.0 | 479.2 | 4.1 |
| 17:50 | 0.02 | 494.9 | 4.03 | 0.0 | 494.9 | 4.0 |
| 17:49 | 0.02 | 492.0 | 4.53 | 0.0 | 492.0 | 4.5 |
| 17:48 | 0.02 | 487.5 | 4.39 | 0.0 | 487.5 | 4.4 |
| 17:47 | 0.04 | 496.1 | 4.05 | 0.0 | 496.1 | 4.0 |
| 17:46 | 0.02 | 487.6 | 3.59 | 0.0 | 487.6 | 3.6 |
| 17:45 | 0.02 | 478.4 | 4.18 | 0.0 | 478.4 | 4.2 |
| 17:44 | 0.02 | 490.4 | 4.42 | 0.0 | 490.4 | 4.4 |
| 17:43 | 0.09 | 487.1 | 4.82 | 0.1 | 487.1 | 4.8 |
| 17:42 | 0.57 | 490.0 | 2.15 | 0.6 | 490.0 | 2.2 |
| 17:41 | 0.27 | 491.2 | -1.45 | 0.3 | 491.2 | -1.4 |
| 17:40 | 0.30 | 494.9 | -1.24 | 0.3 | 494.9 | -1.2 |
| 17:39 | 0.27 | 498.1 | -1.35 | 0.3 | 498.1 | -1.3 |
| 17:38 | 0.10 | 491.4 | -0.61 | 0.1 | 491.4 | -0.6 |
| 17:37 | 0.02 | 484.9 | 1.19 | 0.0 | 484.9 | 1.2 |
| 17:36 | 0.02 | 477.0 | 1.63 | 0.0 | 477.0 | 1.6 |
| 17:35 | 0.05 | 475.5 | 1.51 | 0.1 | 475.5 | 1.5 |
| 17:34 | 0.09 | 492.9 | 0.77 | 0.1 | 492.9 | 0.8 |
| 17:33 | 0.11 | 504.0 | 1.49 | 0.1 | 504.0 | 1.5 |
| 17:32 | 0.19 | 487.2 | 1.85 | 0.2 | 486.3 | 1.9 |
| 17:31 | 0.09 | 480.1 | 2.04 | 0.1 | 480.1 | 2.0 |
| 17:30 | 0.09 | 485.2 | 1.76 | 0.1 | 485.2 | 1.8 |
| 17:29 | 0.10 | 536.5 | 2.28 | 0.1 | 536.5 | 2.3 |
| 17:28 | 0.12 | 501.0 | 3.16 | 0.1 | 501.0 | 3.2 |
| 17:27 | 0.17 | 507.2 | 1.54 | 0.2 | 507.2 | 1.5 |
| 17:26 | 1.45 | 523.6 | -0.18 | 1.4 | 523.6 | -0.2 |
| 17:25 | 0.41 | 511.3 | -0.83 | 0.4 | 511.3 | -0.8 |
| 17:24 | 3.83 | 547.3 | 1.10 | 3.8 | 547.3 | 1.1 |
| 17:23 | 5.91 | 480.8 | -2.02 | 5.9 | 480.8 | -2.0 |
| 17:22 | 4.63 | 462.2 | -2.61 | 4.6 | 462.2 | -2.6 |
| 17:21 | 3.28 | 476.1 | -3.76 | 3.3 | 476.1 | -3.8 |
| 17:20 | 2.35 | 480.5 | -4.64 | 2.4 | 480.5 | -4.6 |
| 17:19 | 2.45 | 490.8 | -3.73 | 2.4 | 490.8 | -3.7 |
| 17:18 | 3.57 | 501.8 | -0.27 | 3.6 | 501.8 | -0.3 |
| 17:17 | 3.52 | 495.4 | -0.73 | 3.5 | 495.4 | -0.7 |
| 17:16 | 3.21 | 497.9 | -1.96 | 3.2 | 497.9 | -2.0 |
| 17:15 | 1.92 | 506.0 | 0.33 | 1.9 | 506.0 | 0.3 |
| 17:14 | 0.89 | 499.4 | -1.91 | 0.9 | 499.4 | -1.9 |
| 17:13 | 0.16 | 496.6 | -3.05 | 0.2 | 496.6 | -3.1 |
| 17:12 | 0.14 | 484.8 | 1.11 | 0.1 | 484.8 | 1.1 |
| 17:11 | 0.41 | 488.7 | -0.14 | 0.4 | 488.7 | -0.1 |
| 17:10 | 0.76 | 494.9 | 0.65 | 0.8 | 494.9 | 0.6 |
| 17:09 | 1.52 | 488.8 | 0.69 | 1.5 | 488.8 | 0.7 |
| 17:08 | 2.16 | 508.5 | 1.93 | 2.2 | 508.5 | 1.9 |
| 17:07 | 1.09 | 482.4 | 0.96 | 1.1 | 482.4 | 1.0 |
| 17:06 | 0.48 | 471.8 | 0.44 | 0.5 | 471.8 | 0.4 |
| 17:05 | 0.46 | 476.9 | 2.16 | 0.5 | 476.9 | 2.2 |
| 17:04 | 1.91 | 492.3 | 3.33 | 1.9 | 492.3 | 3.3 |
| 17:03 | 2.84 | 511.1 | 4.36 | 2.8 | 511.1 | 4.4 |
| 17:02 | 1.44 | 498.7 | - | 1.4 | 498.7 | - |
| 17:01 | 0.37 | 462.8 | 3.58 | 0.4 | 462.8 | 3.6 |
| 17:00 | 0.36 | 462.8 | 4.01 | 0.4 | 462.8 | 4.0 |
| 16:59 | 1.14 | 478.2 | 5.26 | 1.1 | 478.2 | 5.3 |
| 16:58 | 1.80 | 467.5 | 3.45 | 2.3 | 470.1 | 3.5 |
| 16:57 | 6.16 | 499.4 | -2.80 | 6.2 | 499.4 | -2.8 |
| 16:56 | 12.19 | 512.6 | -3.78 | 12.2 | 512.6 | -3.8 |
Built 2026-03-21 18:56 from source
| Solar wind parameters of the latest hour by NOAA | |||
|---|---|---|---|
| parameter | min | max | mean |
| IMF Bz [nT] | 2.6 | 9.8 | 5.7 |
| velocity [km/s] | 432.0 | 498.4 | 472.6 |
| density [cm-3] | 0.0 | 0.6 | 0.1 |
| Geomagnetic activity (RX [nT]) | ||
|---|---|---|
| site | latest hour | next hour (RXmin, RXmax) |
| Kevo (KEV) | 86 | 7 | 185 |
| Maasi (MAS) | 69 | 10 | 173 |
| Kilpisjärvi (KIL) | 55 | 7 | 164 |
| Ivalo (IVA) | 44 | 8 | 148 |
| Muonio (MUO) | 48 | 5 | 139 |
| Sodankylä (SOD) | 51 | 5 | 147 |
| Pello (PEL) | 49 | 5 | 159 |
| Oulujärvi (OUJ) | 46 | 5 | 112 |
| Mekrijärvi (MEK) | 30 | 4 | 29 |
| Hankasalmi (HAN) | 26 | 5 | 41 |
| Nurmijärvi (NUR) | 28 | 5 | 49 |
| Tartu (TAR) | 21 | 4 | 47 |
| low | increased | moderate | high | very high |
Short explanation of the method
AurorasNow! (Finnish Meteorological Institute)Built 2026-03-21 18:47 from source
Issue Time: 2026-03-21 16:50 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2209
Valid From: 2026-03-20 19:30 UTC
Now Valid Until: 2026-03-22 06:00 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: 2209
Valid From: 2026-03-20 19:30 UTC
Now Valid Until: 2026-03-22 06:00 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: 2026-03-21 16:47 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5291
Valid From: 2026-03-20 07:19 UTC
Now Valid Until: 2026-03-22 12:00 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: 5291
Valid From: 2026-03-20 07:19 UTC
Now Valid Until: 2026-03-22 12:00 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: 2026-03-21 07:53 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-03-21 07:52 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: 2026-03-21 07:52 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: 2026-03-21 05:17 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 645
Valid From: 2026-03-20 20:20 UTC
Now Valid Until: 2026-03-21 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: 645
Valid From: 2026-03-20 20:20 UTC
Now Valid Until: 2026-03-21 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: 2026-03-21 05:17 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-03-21 05:14 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: 2026-03-21 05:14 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: 2026-03-21 05:17 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2208
Valid From: 2026-03-20 19:30 UTC
Now Valid Until: 2026-03-21 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: 2208
Valid From: 2026-03-20 19:30 UTC
Now Valid Until: 2026-03-21 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: 2026-03-21 05:17 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5290
Valid From: 2026-03-20 07:19 UTC
Now Valid Until: 2026-03-21 23:59 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: 5290
Valid From: 2026-03-20 07:19 UTC
Now Valid Until: 2026-03-21 23:59 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: 2026-03-21 03:32 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-03-21 03:31 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: 2026-03-21 03:31 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: 2026-03-21 01:54 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-03-21 01:54 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: 2026-03-21 01:54 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: 2026-03-21 01:41 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-03-21 01:41 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: 2026-03-21 01:41 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: 2026-03-21 00:34 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-03-21 00:33 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: 2026-03-21 00:33 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: 2026-03-20 23:29 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-03-20 23:28 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: 2026-03-20 23:28 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: 2026-03-20 23:05 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2026-03-20 23:05 UTC
Valid To: 2026-03-21 06:00 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater
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.
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2026-03-20 23:05 UTC
Valid To: 2026-03-21 06:00 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater
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: 2026-03-20 22:12 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-03-20 22:08 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: 2026-03-20 22:08 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: 2026-03-20 21:36 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-03-20 21:26 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: 2026-03-20 21:26 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: 2026-03-20 21:09 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026-03-20 20:53 UTC
Deviation: 56 nT
Station: BOU
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026-03-20 20:53 UTC
Deviation: 56 nT
Station: BOU
Issue Time: 2026-03-20 21:04 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-03-20 20:59 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: 2026-03-20 20:59 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: 2026-03-20 20:43 UTC
WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day
Mar 20: G3 (Strong) Mar 21: G3 (Strong) Mar 22: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: G3 (Strong) geomagnetic storming is likely due to combined CME effects from events that left the Sun on 16 and 18 Mar.
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.
WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day
Mar 20: G3 (Strong) Mar 21: G3 (Strong) Mar 22: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: G3 (Strong) geomagnetic storming is likely due to combined CME effects from events that left the Sun on 16 and 18 Mar.
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: 2026-03-20 20:40 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026-03-20 20:50 UTC
Valid To: 2026-03-20 21:20 UTC
IP Shock Passage Observed: 2026-03-20 21:18 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026-03-20 20:50 UTC
Valid To: 2026-03-20 21:20 UTC
IP Shock Passage Observed: 2026-03-20 21:18 UTC
Issue Time: 2026-03-20 20:22 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026-03-20 20:20 UTC
Valid To: 2026-03-21 06:00 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Comment: G2 (Moderate) geomagnetic storm conditions are expected into the the early portions of 21 Mar (UTC) due to CME effects.
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: 2026-03-20 20:20 UTC
Valid To: 2026-03-21 06:00 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Comment: G2 (Moderate) geomagnetic storm conditions are expected into the the early portions of 21 Mar (UTC) due to CME effects.
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: 2026-03-20 20:18 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-03-20 20:18 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: 2026-03-20 20:18 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: 2026-03-20 19:32 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026-03-20 19:30 UTC
Valid To: 2026-03-21 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: 2026-03-20 19:30 UTC
Valid To: 2026-03-21 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: 2026-03-20 14:55 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3651
Begin Time: 2026-03-15 16:30 UTC
Yesterday Maximum 2MeV Flux: 4941 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3651
Begin Time: 2026-03-15 16:30 UTC
Yesterday Maximum 2MeV Flux: 4941 pfu
Issue Time: 2026-03-20 12:39 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5289
Valid From: 2026-03-20 07:19 UTC
Now Valid Until: 2026-03-21 12:00 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: 5289
Valid From: 2026-03-20 07:19 UTC
Now Valid Until: 2026-03-21 12:00 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: 2026-03-20 08:54 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026-03-20 08:54 UTC
Synoptic Period: 0600-0900 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: 2026-03-20 08:54 UTC
Synoptic Period: 0600-0900 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: 2026-03-20 07:18 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026-03-20 07:19 UTC
Valid To: 2026-03-20 15:00 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: 2026-03-20 07:19 UTC
Valid To: 2026-03-20 15:00 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: 2026-03-19 04:59 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3650
Begin Time: 2026-03-15 16:30 UTC
Yesterday Maximum 2MeV Flux: 2949 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3650
Begin Time: 2026-03-15 16:30 UTC
Yesterday Maximum 2MeV Flux: 2949 pfu
Issue Time: 2026-03-18 21:14 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day
Mar 19: G2 (Moderate) Mar 20: G2 (Moderate) Mar 21: G2 (Moderate)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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.
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day
Mar 19: G2 (Moderate) Mar 20: G2 (Moderate) Mar 21: G2 (Moderate)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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 2026-03-21 16:53 from source
