Geomagnetic Storms of 2025
42 geomagnetic storms of G1 or more began in 2025: 21 G1, 12 G2, 5 G3, 3 G4, 1 G5. The strongest began November 12, 2025 and reached Kp 9-, rank 53 of every storm since 1932.
By month
Every storm of 2025
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 1, 03:00 | G4 Severe | 8 | 18 | 81 |
| Jan 4, 06:00 | G1 Minor | 5+ | 15 | 31 |
| Feb 15, 09:00 | G1 Minor | 5 | 3 | 28 |
| Feb 19, 00:00 | G1 Minor | 5 | 3 | 20 |
| Feb 27, 09:00 | G2 Moderate | 6- | 3 | 30 |
| Feb 28, 00:00 | G1 Minor | 5 | 3 | 31 |
| Mar 8, 21:00 | G2 Moderate | 6- | 15 | 31 |
| Mar 12, 15:00 | G1 Minor | 5+ | 36 | 36 |
| Mar 21, 18:00 | G2 Moderate | 6- | 12 | 32 |
| Mar 26, 12:00 | G2 Moderate | 6- | 9 | 41 |
| Apr 5, 00:00 | G2 Moderate | 6- | 6 | 40 |
| Apr 5, 18:00 | G1 Minor | 5+ | 9 | 40 |
| Apr 15, 15:00 | G4 Severe | 8- | 33 | 75 |
| Apr 20, 00:00 | G1 Minor | 5 | 3 | 13 |
| Apr 21, 12:00 | G1 Minor | 5+ | 9 | 34 |
| May 2, 00:00 | G1 Minor | 5 | 6 | 38 |
| May 2, 21:00 | G1 Minor | 5+ | 6 | 38 |
| May 17, 00:00 | G2 Moderate | 6+ | 6 | 39 |
| May 29, 00:00 | G2 Moderate | 6+ | 24 | 62 |
| Jun 1, 00:00 | G4 Severe | 8- | 66 | 98 |
| Jun 4, 12:00 | G1 Minor | 5+ | 6 | 27 |
| Jun 12, 18:00 | G3 Strong | 7- | 36 | 69 |
| Jun 26, 21:00 | G1 Minor | 5+ | 6 | 29 |
| Jul 6, 03:00 | G1 Minor | 5 | 3 | 23 |
| Jul 6, 21:00 | G1 Minor | 5 | 6 | 23 |
| Aug 8, 18:00 | G2 Moderate | 6- | 24 | 43 |
| Sep 1, 21:00 | G2 Moderate | 6- | 6 | 31 |
| Sep 6, 15:00 | G1 Minor | 5 | 3 | 25 |
| Sep 9, 21:00 | G1 Minor | 5+ | 3 | 17 |
| Sep 15, 00:00 | G3 Strong | 7- | 15 | 48 |
| Sep 29, 15:00 | G3 Strong | 7 | 63 | 74 |
| Oct 2, 18:00 | G1 Minor | 5 | 12 | 45 |
| Oct 12, 18:00 | G1 Minor | 5 | 3 | 32 |
| Oct 18, 18:00 | G2 Moderate | 6+ | 9 | 38 |
| Oct 30, 09:00 | G1 Minor | 5+ | 15 | 37 |
| Nov 5, 21:00 | G3 Strong | 7- | 12 | 43 |
| Nov 7, 00:00 | G1 Minor | 5+ | 9 | 31 |
| Nov 8, 00:00 | G2 Moderate | 6 | 9 | 33 |
| Nov 12, 00:00 | G5 Extreme | 9- | 33 | 137 |
| Dec 3, 18:00 | G3 Strong | 7- | 12 | 32 |
| Dec 10, 21:00 | G2 Moderate | 6 | 6 | 27 |
| Dec 12, 18:00 | G1 Minor | 5 | 3 | 27 |
More
Sources
Kp and ap from GFZ Helmholtz Centre for Geosciences, Geomagnetic Observatory Niemegk, licensed CC BY 4.0: Matzka, J., Stolle, C., Yamazaki, Y., Bronkalla, O. and Morschhauser, A., 2021, The geomagnetic Kp index and derived indices of geomagnetic activity, Space Weather, doi:10.1029/2020SW002641; data doi:10.5880/Kp.0001. Storms, levels and aurora reach worked out by WeatherOverTime from those values and NOAA’s space weather scales. Definitive through August 31, 2026; later values are preliminary. Rebuilt 2026-09-24.