Geomagnetic Storms of 1959
77 geomagnetic storms of G1 or more began in 1959: 34 G1, 28 G2, 6 G3, 7 G4, 2 G5. The strongest began July 15, 1959 and reached Kp 9, rank 15 of every storm since 1932.
By month
Every storm of 1959
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 5, 21:00 | G2 Moderate | 6- | 3 | 25 |
| Jan 9, 15:00 | G2 Moderate | 6+ | 30 | 45 |
| Jan 26, 12:00 | G2 Moderate | 6 | 3 | 22 |
| Feb 4, 00:00 | G1 Minor | 5 | 3 | 36 |
| Feb 4, 21:00 | G1 Minor | 5+ | 3 | 36 |
| Feb 9, 06:00 | G1 Minor | 5 | 3 | 23 |
| Feb 11, 09:00 | G2 Moderate | 6+ | 6 | 36 |
| Feb 12, 03:00 | G1 Minor | 5 | 3 | 24 |
| Feb 14, 12:00 | G2 Moderate | 6- | 24 | 37 |
| Feb 16, 00:00 | G2 Moderate | 6+ | 33 | 61 |
| Feb 25, 06:00 | G3 Strong | 7+ | 27 | 69 |
| Feb 27, 15:00 | G2 Moderate | 6- | 51 | 44 |
| Mar 25, 03:00 | G1 Minor | 5+ | 18 | 31 |
| Mar 26, 09:00 | G4 Severe | 8+ | 84 | 178 |
| Mar 30, 09:00 | G1 Minor | 5 | 3 | 20 |
| Mar 31, 21:00 | G1 Minor | 5 | 3 | 19 |
| Apr 8, 21:00 | G2 Moderate | 6+ | 9 | 44 |
| Apr 9, 18:00 | G4 Severe | 8- | 27 | 98 |
| Apr 11, 21:00 | G1 Minor | 5 | 3 | 23 |
| Apr 23, 15:00 | G3 Strong | 7- | 9 | 40 |
| Apr 29, 15:00 | G1 Minor | 5 | 3 | 24 |
| Apr 30, 15:00 | G1 Minor | 5 | 3 | 21 |
| May 4, 21:00 | G2 Moderate | 6+ | 9 | 29 |
| May 8, 03:00 | G1 Minor | 5+ | 9 | 33 |
| May 11, 21:00 | G4 Severe | 8+ | 24 | 108 |
| May 15, 12:00 | G2 Moderate | 6 | 21 | 36 |
| May 18, 21:00 | G1 Minor | 5 | 3 | 24 |
| May 24, 06:00 | G3 Strong | 7+ | 21 | 52 |
| May 31, 12:00 | G1 Minor | 5 | 3 | 22 |
| Jun 4, 21:00 | G1 Minor | 5 | 3 | 23 |
| Jun 11, 09:00 | G2 Moderate | 6 | 6 | 25 |
| Jun 24, 00:00 | G2 Moderate | 6 | 6 | 26 |
| Jun 27, 12:00 | G2 Moderate | 6 | 27 | 34 |
| Jun 29, 06:00 | G2 Moderate | 6+ | 33 | 51 |
| Jul 11, 15:00 | G3 Strong | 7- | 12 | 44 |
| Jul 15, 03:00 | G5 Extreme | 9 | 27 | 236 |
| Jul 16, 21:00 | G1 Minor | 5 | 3 | 47 |
| Jul 17, 15:00 | G5 Extreme | 9- | 36 | 119 |
| Jul 19, 15:00 | G1 Minor | 5 | 3 | 31 |
| Jul 24, 09:00 | G1 Minor | 5+ | 36 | 38 |
| Jul 26, 18:00 | G1 Minor | 5 | 3 | 33 |
| Aug 3, 06:00 | G1 Minor | 5 | 3 | 20 |
| Aug 6, 18:00 | G1 Minor | 5 | 3 | 22 |
| Aug 15, 15:00 | G4 Severe | 8+ | 66 | 130 |
| Aug 20, 03:00 | G2 Moderate | 6- | 18 | 38 |
| Aug 21, 09:00 | G1 Minor | 5+ | 12 | 35 |
| Aug 22, 18:00 | G1 Minor | 5 | 3 | 27 |
| Aug 24, 06:00 | G1 Minor | 5 | 3 | 20 |
| Sep 2, 03:00 | G1 Minor | 5+ | 6 | 34 |
| Sep 3, 21:00 | G4 Severe | 8- | 30 | 103 |
| Sep 5, 21:00 | G2 Moderate | 6- | 6 | 34 |
| Sep 13, 21:00 | G1 Minor | 5+ | 3 | 14 |
| Sep 17, 18:00 | G1 Minor | 5 | 6 | 23 |
| Sep 18, 21:00 | G2 Moderate | 6 | 15 | 36 |
| Sep 20, 03:00 | G3 Strong | 7 | 66 | 86 |
| Sep 23, 21:00 | G1 Minor | 5 | 3 | 25 |
| Sep 24, 12:00 | G1 Minor | 5 | 15 | 37 |
| Sep 25, 15:00 | G2 Moderate | 6- | 3 | 37 |
| Oct 1, 03:00 | G2 Moderate | 6 | 9 | 44 |
| Oct 2, 03:00 | G2 Moderate | 6- | 6 | 23 |
| Oct 3, 15:00 | G3 Strong | 7 | 24 | 51 |
| Oct 5, 18:00 | G2 Moderate | 6 | 27 | 53 |
| Oct 18, 09:00 | G1 Minor | 5+ | 3 | 36 |
| Oct 26, 12:00 | G1 Minor | 5 | 3 | 26 |
| Oct 30, 00:00 | G1 Minor | 5+ | 3 | 29 |
| Oct 30, 21:00 | G2 Moderate | 6+ | 96 | 69 |
| Nov 4, 12:00 | G2 Moderate | 6 | 21 | 36 |
| Nov 23, 00:00 | G2 Moderate | 6- | 12 | 40 |
| Nov 28, 00:00 | G4 Severe | 8 | 12 | 83 |
| Nov 30, 06:00 | G2 Moderate | 6 | 21 | 43 |
| Dec 2, 09:00 | G1 Minor | 5 | 3 | 30 |
| Dec 3, 00:00 | G2 Moderate | 6- | 24 | 50 |
| Dec 5, 12:00 | G4 Severe | 8- | 12 | 68 |
| Dec 13, 21:00 | G1 Minor | 5+ | 21 | 41 |
| Dec 23, 15:00 | G2 Moderate | 6 | 3 | 28 |
| Dec 27, 09:00 | G2 Moderate | 6- | 3 | 38 |
| Dec 28, 00:00 | G1 Minor | 5+ | 18 | 41 |
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.