SeadedLast update:
Time UTC | DSCOVR | ACE | ||||
---|---|---|---|---|---|---|
Solar Wind | GSM | Solar Wind | GSM | |||
Proton Density | Bulk Speed | Bz | Proton Density | Bulk Speed | Bz | |
05:12 | - | - | - | - | - | - |
05:11 | - | - | - | - | - | - |
05:10 | 2.26 | 516.6 | -1.46 | - | - | - |
05:09 | 2.46 | 520.9 | -1.88 | - | - | - |
05:08 | 1.76 | 511.0 | -1.56 | - | - | - |
05:07 | 2.46 | 518.9 | -1.34 | 2.5 | 518.9 | -1.3 |
05:06 | 3.60 | 525.0 | -1.49 | 3.6 | 525.0 | -1.5 |
05:05 | 0.38 | 495.7 | -1.10 | 0.4 | 495.7 | -1.1 |
05:04 | 2.71 | 514.3 | -1.81 | 2.7 | 514.3 | -1.8 |
05:03 | 2.25 | 519.6 | -1.20 | 2.2 | 519.6 | -1.2 |
05:02 | 1.66 | 514.7 | -0.59 | 1.7 | 514.7 | -0.6 |
05:01 | 2.07 | 519.9 | -0.74 | 2.1 | 519.9 | -0.7 |
05:00 | 2.13 | 518.2 | -0.75 | 2.1 | 518.2 | -0.7 |
04:59 | 2.50 | 522.2 | -0.73 | 2.5 | 522.2 | -0.7 |
04:58 | 1.95 | 516.2 | -0.72 | 1.9 | 516.2 | -0.7 |
04:57 | 2.14 | 517.6 | -0.52 | 2.1 | 517.6 | -0.5 |
04:56 | 2.33 | 521.0 | -0.36 | 2.3 | 521.0 | -0.4 |
04:55 | 2.48 | 520.5 | -0.29 | 2.5 | 520.5 | -0.3 |
04:54 | 2.46 | 516.9 | 1.19 | 2.5 | 516.9 | 1.2 |
04:53 | 2.67 | 516.5 | 0.64 | 2.7 | 516.5 | 0.6 |
04:52 | 3.25 | 520.4 | 0.30 | 3.2 | 520.4 | 0.3 |
04:51 | 2.10 | 514.6 | 0.10 | 2.1 | 514.6 | 0.1 |
04:50 | 0.90 | 508.1 | -0.01 | 0.9 | 508.1 | -0.0 |
04:49 | 2.45 | 517.4 | -0.21 | 2.4 | 517.4 | -0.2 |
04:48 | 2.43 | 518.4 | -0.14 | 2.4 | 518.4 | -0.1 |
04:47 | 2.41 | 518.3 | -0.08 | 2.4 | 518.3 | -0.1 |
04:46 | 2.41 | - | -0.28 | 2.4 | - | -0.3 |
04:45 | 3.23 | 524.8 | -0.50 | 3.2 | 524.8 | -0.5 |
04:44 | 2.28 | 514.5 | -0.52 | 2.3 | 514.5 | -0.5 |
04:43 | 0.79 | 505.1 | -0.47 | 0.8 | 505.1 | -0.5 |
04:42 | 2.31 | 518.7 | -0.74 | 2.3 | 518.7 | -0.7 |
04:41 | 3.33 | 523.9 | -0.74 | 3.3 | 523.9 | -0.7 |
04:40 | 3.18 | 523.7 | 1.71 | 3.2 | 523.7 | 1.7 |
04:39 | 3.70 | 530.6 | 0.98 | 3.7 | 530.6 | 1.0 |
04:38 | 4.04 | 540.0 | -0.04 | 4.0 | 540.0 | -0.0 |
04:37 | 20.67 | 680.2 | 0.36 | 20.7 | 680.2 | 0.4 |
04:36 | 36.15 | 799.4 | 0.42 | 36.1 | 799.4 | 0.4 |
04:35 | 3.05 | 528.9 | 0.49 | 3.1 | 528.9 | 0.5 |
04:34 | 2.65 | 526.7 | 0.33 | 2.7 | 526.7 | 0.3 |
04:33 | 2.40 | 525.0 | -0.13 | 2.4 | 525.0 | -0.1 |
04:32 | - | - | -0.38 | - | - | -0.4 |
04:31 | 3.31 | 528.3 | -0.71 | 3.3 | 528.3 | -0.7 |
04:30 | 2.89 | 526.2 | -0.81 | 2.9 | 526.2 | -0.8 |
04:29 | 4.24 | 551.6 | -0.91 | 4.2 | 551.6 | -0.9 |
04:28 | 1.73 | 526.9 | -0.73 | 1.7 | 526.9 | -0.7 |
04:27 | 2.36 | 525.0 | -1.02 | 2.4 | 525.0 | -1.0 |
04:26 | 2.36 | 519.8 | -2.14 | 2.4 | 519.8 | -2.1 |
04:25 | 1.92 | 516.6 | -2.77 | 1.9 | 516.6 | -2.8 |
04:24 | 1.87 | 517.8 | -3.08 | 1.9 | 517.8 | -3.1 |
04:23 | 2.05 | 524.5 | -2.88 | 2.0 | 524.5 | -2.9 |
04:22 | 2.14 | 529.9 | -2.53 | 2.1 | 529.9 | -2.5 |
04:21 | - | - | -2.08 | - | - | -2.1 |
04:20 | 2.33 | 513.6 | -2.05 | 2.3 | 513.6 | -2.1 |
04:19 | 3.98 | 567.0 | -1.35 | 4.0 | 567.0 | -1.4 |
04:18 | 9.30 | 702.8 | -1.47 | 9.3 | 702.8 | -1.5 |
04:17 | 2.64 | 517.1 | -1.56 | 2.6 | 517.1 | -1.6 |
04:16 | 2.81 | 515.0 | -1.67 | 2.8 | 515.0 | -1.7 |
04:15 | - | - | -1.56 | - | - | -1.6 |
04:14 | 2.76 | 512.8 | -1.40 | 2.8 | 512.8 | -1.4 |
04:13 | 2.76 | 512.8 | -1.53 | 2.8 | 512.8 | -1.5 |
04:12 | - | - | -1.13 | - | - | -1.1 |
04:11 | - | - | -0.56 | - | - | -0.6 |
04:10 | 1.96 | 513.2 | 0.68 | 2.0 | 513.2 | 0.7 |
04:09 | 2.52 | 514.0 | -0.64 | 2.5 | 514.0 | -0.6 |
04:08 | 19.45 | 558.3 | -1.19 | 19.5 | 558.3 | -1.2 |
04:07 | 32.15 | 591.8 | -1.09 | 32.1 | 591.8 | -1.1 |
04:06 | 2.95 | 522.4 | -0.85 | 3.0 | 522.4 | -0.8 |
04:05 | 2.62 | 519.8 | -1.24 | 2.6 | 519.8 | -1.2 |
04:04 | 5.07 | 602.5 | -0.62 | 5.1 | 602.5 | -0.6 |
04:03 | 12.13 | 805.9 | -0.41 | 12.1 | 805.9 | -0.4 |
04:02 | 2.08 | 516.1 | -0.33 | 2.1 | 516.1 | -0.3 |
04:01 | 2.14 | 515.8 | -0.39 | 2.1 | 515.8 | -0.4 |
04:00 | 2.67 | 513.3 | -0.78 | 2.7 | 513.3 | -0.8 |
03:59 | - | - | - | - | - | - |
03:58 | - | - | -1.29 | - | - | -1.3 |
03:57 | - | - | -1.51 | - | - | -1.5 |
03:56 | 2.39 | 522.7 | -1.75 | 2.4 | 522.7 | -1.7 |
03:55 | 13.33 | 576.6 | -1.61 | 13.3 | 576.6 | -1.6 |
03:54 | 11.37 | 702.3 | -2.06 | 11.4 | 702.3 | -2.1 |
03:53 | 5.13 | 606.7 | -2.42 | 5.1 | 606.7 | -2.4 |
03:52 | 2.85 | 524.6 | -1.29 | 2.8 | 524.6 | -1.3 |
03:51 | - | - | -0.71 | - | - | -0.7 |
03:50 | - | - | 0.01 | - | - | 0.0 |
03:49 | 2.18 | 524.0 | 0.41 | 2.2 | 524.0 | 0.4 |
03:48 | 2.35 | 524.7 | 0.37 | 2.4 | 524.7 | 0.4 |
03:47 | 2.35 | 524.0 | -0.78 | 2.3 | 524.0 | -0.8 |
03:46 | 4.87 | 540.9 | 0.06 | 4.9 | 540.9 | 0.1 |
03:45 | 13.93 | 600.9 | -1.43 | 13.9 | 600.9 | -1.4 |
03:44 | 11.46 | 581.2 | -1.43 | 11.5 | 581.2 | -1.4 |
03:43 | - | - | -0.72 | - | - | -0.7 |
03:42 | 2.58 | 527.4 | -1.51 | 2.6 | 527.4 | -1.5 |
03:41 | - | - | -1.31 | - | - | -1.3 |
03:40 | - | - | -0.78 | - | - | -0.8 |
03:39 | 3.09 | 528.7 | -0.86 | 3.1 | 528.7 | -0.9 |
03:38 | 3.09 | 528.7 | -0.86 | 3.1 | 528.7 | -0.9 |
03:37 | - | - | -1.40 | - | - | -1.4 |
03:36 | - | - | -1.68 | - | - | -1.7 |
03:35 | 2.95 | 524.0 | -1.32 | 3.0 | 524.0 | -1.3 |
03:34 | 7.68 | 551.0 | -0.89 | 7.7 | 551.0 | -0.9 |
03:33 | 9.83 | 563.9 | -1.15 | 9.8 | 563.9 | -1.1 |
03:32 | 2.81 | 524.5 | -0.96 | 2.8 | 524.5 | -1.0 |
03:31 | 2.71 | 523.0 | -0.80 | 2.7 | 523.0 | -0.8 |
03:30 | - | - | -0.81 | - | - | -0.8 |
03:29 | 18.28 | 674.1 | -0.83 | 18.3 | 674.1 | -0.8 |
03:28 | 5.45 | - | -1.92 | 5.5 | - | -1.9 |
03:27 | 5.45 | 575.2 | -1.83 | 5.5 | 575.2 | -1.8 |
03:26 | 5.61 | 574.3 | -2.15 | 5.6 | 574.3 | -2.2 |
03:25 | 26.19 | 606.6 | -2.14 | 26.2 | 606.6 | -2.1 |
03:24 | 8.26 | 547.5 | -2.15 | 8.3 | 547.5 | -2.2 |
03:23 | 17.46 | 506.0 | -2.13 | 17.5 | 506.0 | -2.1 |
03:22 | 17.32 | 554.3 | -1.89 | 17.3 | 554.3 | -1.9 |
03:21 | - | - | -1.74 | - | - | -1.7 |
03:20 | - | - | -0.86 | - | - | -0.9 |
03:19 | 3.46 | 544.8 | -1.94 | 3.5 | 544.8 | -1.9 |
03:18 | 2.96 | 537.2 | -1.79 | 3.0 | 537.2 | -1.8 |
03:17 | 2.30 | 527.3 | -2.81 | 2.3 | 527.3 | -2.8 |
03:16 | 2.73 | 535.1 | -1.99 | 2.7 | 535.1 | -2.0 |
03:15 | 3.68 | 539.2 | -1.22 | 3.7 | 539.2 | -1.2 |
03:14 | 6.87 | 554.2 | -1.42 | 6.9 | 554.2 | -1.4 |
03:13 | 7.14 | 559.5 | -2.61 | 7.1 | 559.5 | -2.6 |
Built 2025-09-03 05:13 from source
Solar wind parameters of the latest hour by NOAA | |||
---|---|---|---|
parameter | min | max | mean |
IMF Bz [nT] | -3.1 | 1.7 | -0.7 |
velocity [km/s] | 505.1 | 805.9 | 545.7 |
density [cm-3] | 0.8 | 36.1 | 4.9 |
Geomagnetic activity (RX [nT]) | ||
---|---|---|
site | latest hour | next hour (RXmin, RXmax) |
Kevo (KEV) | 91 | 8 | 142 |
Maasi (MAS) | 89 | 9 | 141 |
Kilpisjärvi (KIL) | - | 8 | 167 |
Ivalo (IVA) | 68 | 7 | 123 |
Muonio (MUO) | - | 7 | 102 |
Sodankylä (SOD) | 37 | 6 | 92 |
Pello (PEL) | 49 | 6 | 87 |
Oulujärvi (OUJ) | 17 | 5 | 44 |
Mekrijärvi (MEK) | 11 | 3 | 21 |
Hankasalmi (HAN) | 12 | 4 | 26 |
Nurmijärvi (NUR) | 15 | 4 | 26 |
Tartu (TAR) | 14 | 3 | 20 |
low | increased | moderate | high | very high |
Short explanation of the method
AurorasNow! (Finnish Meteorological Institute)Built 2025-09-03 05:02 from source
Issue Time: 2025-09-03 03:01 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-09-03 02:59 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: 2025-09-03 02:59 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: 2025-09-02 20:48 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-09-02 20:47 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: 2025-09-02 20:47 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: 2025-09-02 17:01 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025-09-02 16:55 UTC
Valid To: 2025-09-02 23:59 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: 2025-09-02 16:55 UTC
Valid To: 2025-09-02 23:59 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: 2025-09-02 17:01 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2090
Valid From: 2025-09-01 20:41 UTC
Now Valid Until: 2025-09-03 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: 2090
Valid From: 2025-09-01 20:41 UTC
Now Valid Until: 2025-09-03 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: 2025-09-02 16:59 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5067
Valid From: 2025-09-01 20:40 UTC
Now Valid Until: 2025-09-03 09:00 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: 5067
Valid From: 2025-09-01 20:40 UTC
Now Valid Until: 2025-09-03 09:00 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: 2025-09-02 16:57 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day
Sep 03: G1 (Minor) Sep 04: None (Below G1) Sep 05: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: Lingering CME effects are likely to cause periods of G1 (Minor) geomagnetic storming on 03 Sep.
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
Sep 03: G1 (Minor) Sep 04: None (Below G1) Sep 05: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: Lingering CME effects are likely to cause periods of G1 (Minor) geomagnetic storming on 03 Sep.
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: 2025-09-02 01:06 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-09-02 01:01 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: 2025-09-02 01:01 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: 2025-09-01 22:41 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-09-01 22:36 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: 2025-09-01 22:36 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: 2025-09-01 21:22 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2025-09-01 21:01 UTC
Deviation: 58 nT
Station: CNB
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2025-09-01 21:01 UTC
Deviation: 58 nT
Station: CNB
Issue Time: 2025-09-01 21:08 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-09-01 21:03 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: 2025-09-01 21:03 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: 2025-09-01 21:08 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025-09-01 21:01 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: 2025-09-01 21:01 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: 2025-09-01 21:08 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025-09-01 21:07 UTC
Valid To: 2025-09-02 14:59 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: 2025-09-01 21:07 UTC
Valid To: 2025-09-02 14:59 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: 2025-09-01 20:44 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025-09-01 20:41 UTC
Valid To: 2025-09-02 20:59 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Comment: Minor geomagnetic storming due to arrival of the 30 Aug CME is expected to commence and persist through the majority of 02 Sep.
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: 2025-09-01 20:41 UTC
Valid To: 2025-09-02 20:59 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Comment: Minor geomagnetic storming due to arrival of the 30 Aug CME is expected to commence and persist through the majority of 02 Sep.
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: 2025-09-01 20:41 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025-09-01 20:40 UTC
Valid To: 2025-09-02 23:59 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: 2025-09-01 20:40 UTC
Valid To: 2025-09-02 23:59 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: 2025-09-01 20:39 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2025-09-01 20:45 UTC
Valid To: 2025-09-01 21:45 UTC
IP Shock Passage Observed: 2025-09-01 20:30 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2025-09-01 20:45 UTC
Valid To: 2025-09-01 21:45 UTC
IP Shock Passage Observed: 2025-09-01 20:30 UTC
Issue Time: 2025-09-01 09:34 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2025-09-01 09:30 UTC
Valid To: 2025-09-01 23:59 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2025-09-01 09:30 UTC
Valid To: 2025-09-01 23:59 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
Issue Time: 2025-08-31 04:58 UTC
WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day
Aug 31: None (Below G1) Sep 01: G2 (Moderate) Sep 02: G3 (Strong)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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
Aug 31: None (Below G1) Sep 01: G2 (Moderate) Sep 02: G3 (Strong)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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.
Built 2025-09-03 03:03 from source