Geomagnetic Storms of 2001
36 geomagnetic storms of G1 or more began in 2001: 17 G1, 6 G2, 8 G3, 3 G4, 2 G5. The strongest began March 31, 2001 and reached Kp 9-, rank 44 of every storm since 1932.
By month
Every storm of 2001
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 29, 03:00 | G1 Minor | 5 | 3 | 16 |
| Mar 5, 00:00 | G1 Minor | 5 | 3 | 20 |
| Mar 19, 15:00 | G3 Strong | 7+ | 27 | 74 |
| Mar 23, 03:00 | G1 Minor | 5 | 3 | 29 |
| Mar 27, 18:00 | G2 Moderate | 6+ | 24 | 45 |
| Mar 31, 00:00 | G5 Extreme | 9- | 33 | 192 |
| Apr 1, 21:00 | G1 Minor | 5 | 3 | 38 |
| Apr 4, 15:00 | G1 Minor | 5+ | 6 | 23 |
| Apr 8, 09:00 | G3 Strong | 7 | 15 | 63 |
| Apr 9, 15:00 | G1 Minor | 5 | 3 | 21 |
| Apr 11, 15:00 | G4 Severe | 8+ | 21 | 85 |
| Apr 13, 09:00 | G3 Strong | 7+ | 12 | 50 |
| Apr 18, 00:00 | G3 Strong | 7+ | 9 | 50 |
| Apr 22, 12:00 | G2 Moderate | 6+ | 6 | 37 |
| Apr 28, 03:00 | G2 Moderate | 6 | 15 | 40 |
| May 9, 00:00 | G1 Minor | 5+ | 30 | 39 |
| May 12, 12:00 | G1 Minor | 5+ | 15 | 30 |
| May 13, 18:00 | G1 Minor | 5+ | 3 | 27 |
| Jun 2, 00:00 | G1 Minor | 5+ | 3 | 23 |
| Jun 9, 18:00 | G2 Moderate | 6- | 9 | 25 |
| Jun 18, 06:00 | G1 Minor | 5+ | 9 | 36 |
| Jul 9, 00:00 | G1 Minor | 5 | 3 | 10 |
| Jul 31, 12:00 | G1 Minor | 5 | 3 | 26 |
| Aug 5, 12:00 | G1 Minor | 5 | 3 | 21 |
| Aug 13, 03:00 | G1 Minor | 5+ | 3 | 22 |
| Aug 17, 15:00 | G3 Strong | 7 | 9 | 42 |
| Sep 23, 06:00 | G2 Moderate | 6 | 15 | 41 |
| Sep 25, 18:00 | G3 Strong | 7+ | 15 | 33 |
| Sep 29, 21:00 | G1 Minor | 5+ | 3 | 28 |
| Sep 30, 15:00 | G3 Strong | 7 | 81 | 69 |
| Oct 11, 15:00 | G2 Moderate | 6 | 15 | 34 |
| Oct 21, 15:00 | G4 Severe | 8- | 36 | 96 |
| Oct 28, 03:00 | G3 Strong | 7- | 12 | 44 |
| Nov 1, 00:00 | G1 Minor | 5 | 3 | 24 |
| Nov 5, 18:00 | G5 Extreme | 9- | 33 | 142 |
| Nov 24, 03:00 | G4 Severe | 8+ | 15 | 104 |
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.