Geomagnetic Storms of 1961
52 geomagnetic storms of G1 or more began in 1961: 21 G1, 19 G2, 5 G3, 5 G4, 2 G5. The strongest began October 28, 1961 and reached Kp 9-, rank 58 of every storm since 1932.
By month
Every storm of 1961
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 9, 21:00 | G1 Minor | 5 | 3 | 30 |
| Jan 15, 21:00 | G2 Moderate | 6- | 3 | 19 |
| Jan 19, 18:00 | G2 Moderate | 6 | 15 | 41 |
| Feb 4, 12:00 | G3 Strong | 7 | 21 | 43 |
| Feb 6, 06:00 | G1 Minor | 5 | 3 | 23 |
| Feb 13, 09:00 | G1 Minor | 5 | 3 | 23 |
| Feb 16, 09:00 | G1 Minor | 5+ | 3 | 27 |
| Feb 17, 12:00 | G3 Strong | 7- | 30 | 51 |
| Feb 20, 15:00 | G1 Minor | 5+ | 3 | 30 |
| Mar 5, 21:00 | G3 Strong | 7- | 9 | 37 |
| Mar 10, 06:00 | G3 Strong | 7 | 9 | 46 |
| Mar 15, 12:00 | G1 Minor | 5 | 3 | 24 |
| Mar 16, 06:00 | G1 Minor | 5+ | 3 | 21 |
| Mar 19, 03:00 | G2 Moderate | 6 | 15 | 38 |
| Mar 27, 15:00 | G2 Moderate | 6 | 3 | 22 |
| Apr 3, 03:00 | G2 Moderate | 6 | 3 | 27 |
| Apr 9, 09:00 | G2 Moderate | 6+ | 3 | 25 |
| Apr 11, 03:00 | G1 Minor | 5+ | 15 | 26 |
| Apr 13, 15:00 | G1 Minor | 5+ | 3 | 15 |
| Apr 14, 15:00 | G4 Severe | 8- | 18 | 61 |
| May 2, 00:00 | G2 Moderate | 6- | 3 | 19 |
| May 5, 15:00 | G1 Minor | 5+ | 18 | 30 |
| May 13, 00:00 | G1 Minor | 5+ | 3 | 22 |
| May 16, 03:00 | G1 Minor | 5+ | 3 | 28 |
| May 25, 03:00 | G2 Moderate | 6- | 6 | 34 |
| Jun 1, 12:00 | G2 Moderate | 6- | 6 | 30 |
| Jun 2, 18:00 | G1 Minor | 5 | 3 | 28 |
| Jun 6, 15:00 | G1 Minor | 5+ | 3 | 17 |
| Jun 7, 12:00 | G1 Minor | 5 | 3 | 24 |
| Jun 21, 00:00 | G3 Strong | 7 | 48 | 58 |
| Jun 29, 03:00 | G2 Moderate | 6+ | 3 | 25 |
| Jul 4, 21:00 | G2 Moderate | 6+ | 18 | 45 |
| Jul 13, 09:00 | G4 Severe | 8+ | 36 | 102 |
| Jul 16, 00:00 | G2 Moderate | 6- | 3 | 23 |
| Jul 17, 18:00 | G4 Severe | 8- | 33 | 93 |
| Jul 20, 21:00 | G2 Moderate | 6- | 12 | 35 |
| Jul 23, 15:00 | G1 Minor | 5 | 3 | 17 |
| Jul 26, 18:00 | G4 Severe | 8+ | 30 | 114 |
| Aug 2, 00:00 | G2 Moderate | 6+ | 9 | 42 |
| Aug 29, 18:00 | G1 Minor | 5 | 3 | 16 |
| Aug 30, 12:00 | G2 Moderate | 6 | 21 | 37 |
| Sep 12, 06:00 | G1 Minor | 5 | 3 | 17 |
| Sep 14, 12:00 | G2 Moderate | 6 | 3 | 28 |
| Sep 24, 09:00 | G2 Moderate | 6 | 24 | 42 |
| Sep 30, 21:00 | G5 Extreme | 9- | 15 | 114 |
| Oct 12, 00:00 | G1 Minor | 5 | 3 | 21 |
| Oct 20, 00:00 | G1 Minor | 5+ | 3 | 18 |
| Oct 26, 06:00 | G1 Minor | 5+ | 24 | 31 |
| Oct 28, 06:00 | G5 Extreme | 9- | 27 | 129 |
| Nov 7, 09:00 | G2 Moderate | 6+ | 18 | 42 |
| Nov 18, 00:00 | G2 Moderate | 6+ | 21 | 49 |
| Dec 1, 09:00 | G4 Severe | 8- | 54 | 66 |
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.