Geomagnetic Storms of 1993
63 geomagnetic storms of G1 or more began in 1993: 34 G1, 18 G2, 9 G3, 2 G4, 0 G5. The strongest began April 4, 1993 and reached Kp 8-, rank 215 of every storm since 1932.
By month
Every storm of 1993
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 3, 00:00 | G1 Minor | 5+ | 6 | 33 |
| Jan 4, 00:00 | G1 Minor | 5+ | 3 | 31 |
| Jan 10, 06:00 | G2 Moderate | 6 | 3 | 25 |
| Jan 11, 12:00 | G1 Minor | 5+ | 3 | 21 |
| Jan 25, 12:00 | G1 Minor | 5+ | 15 | 25 |
| Jan 31, 03:00 | G2 Moderate | 6 | 24 | 59 |
| Feb 1, 15:00 | G1 Minor | 5 | 3 | 31 |
| Feb 7, 18:00 | G1 Minor | 5+ | 24 | 40 |
| Feb 10, 18:00 | G1 Minor | 5 | 3 | 17 |
| Feb 17, 12:00 | G3 Strong | 7- | 6 | 36 |
| Feb 20, 21:00 | G1 Minor | 5 | 3 | 26 |
| Feb 21, 15:00 | G1 Minor | 5 | 3 | 27 |
| Feb 22, 06:00 | G2 Moderate | 6 | 3 | 30 |
| Mar 3, 18:00 | G2 Moderate | 6- | 12 | 35 |
| Mar 7, 03:00 | G1 Minor | 5 | 3 | 23 |
| Mar 8, 21:00 | G3 Strong | 7- | 15 | 64 |
| Mar 10, 00:00 | G1 Minor | 5 | 3 | 15 |
| Mar 11, 12:00 | G3 Strong | 7- | 15 | 50 |
| Mar 12, 18:00 | G1 Minor | 5 | 27 | 31 |
| Mar 15, 06:00 | G2 Moderate | 6- | 39 | 45 |
| Mar 18, 00:00 | G1 Minor | 5 | 3 | 18 |
| Mar 21, 09:00 | G1 Minor | 5+ | 6 | 30 |
| Mar 24, 03:00 | G3 Strong | 7+ | 9 | 58 |
| Mar 29, 03:00 | G1 Minor | 5 | 3 | 18 |
| Apr 4, 12:00 | G4 Severe | 8- | 33 | 87 |
| Apr 8, 18:00 | G1 Minor | 5 | 3 | 26 |
| Apr 9, 15:00 | G2 Moderate | 6- | 9 | 28 |
| Apr 12, 03:00 | G1 Minor | 5+ | 3 | 16 |
| Apr 13, 03:00 | G2 Moderate | 6- | 9 | 32 |
| Apr 15, 21:00 | G1 Minor | 5+ | 3 | 29 |
| Apr 20, 03:00 | G1 Minor | 5 | 3 | 23 |
| Apr 21, 15:00 | G2 Moderate | 6- | 3 | 33 |
| Apr 22, 18:00 | G1 Minor | 5 | 3 | 21 |
| May 7, 21:00 | G2 Moderate | 6- | 12 | 41 |
| May 8, 21:00 | G2 Moderate | 6+ | 42 | 48 |
| May 17, 18:00 | G1 Minor | 5 | 3 | 19 |
| Jun 4, 03:00 | G2 Moderate | 6 | 27 | 54 |
| Jun 5, 18:00 | G1 Minor | 5 | 3 | 37 |
| Jun 10, 18:00 | G3 Strong | 7 | 6 | 28 |
| Jun 23, 18:00 | G1 Minor | 5+ | 3 | 17 |
| Jul 2, 21:00 | G2 Moderate | 6 | 6 | 29 |
| Jul 11, 03:00 | G1 Minor | 5 | 3 | 20 |
| Jul 29, 18:00 | G1 Minor | 5 | 3 | 18 |
| Aug 4, 15:00 | G1 Minor | 5+ | 12 | 25 |
| Aug 15, 21:00 | G3 Strong | 7 | 33 | 78 |
| Aug 27, 15:00 | G2 Moderate | 6 | 3 | 26 |
| Sep 3, 12:00 | G2 Moderate | 6- | 12 | 36 |
| Sep 12, 21:00 | G4 Severe | 8- | 36 | 91 |
| Sep 20, 21:00 | G1 Minor | 5+ | 6 | 21 |
| Sep 23, 21:00 | G1 Minor | 5 | 3 | 12 |
| Sep 29, 15:00 | G1 Minor | 5 | 6 | 25 |
| Sep 30, 21:00 | G1 Minor | 5 | 6 | 26 |
| Oct 9, 03:00 | G3 Strong | 7- | 27 | 48 |
| Oct 11, 15:00 | G1 Minor | 5+ | 3 | 28 |
| Oct 25, 09:00 | G2 Moderate | 6+ | 9 | 40 |
| Oct 27, 12:00 | G1 Minor | 5 | 9 | 38 |
| Oct 28, 21:00 | G1 Minor | 5 | 3 | 21 |
| Nov 3, 21:00 | G3 Strong | 7- | 36 | 77 |
| Nov 18, 12:00 | G2 Moderate | 6 | 18 | 31 |
| Dec 1, 21:00 | G2 Moderate | 6 | 3 | 29 |
| Dec 2, 18:00 | G3 Strong | 7- | 15 | 48 |
| Dec 7, 21:00 | G2 Moderate | 6+ | 15 | 47 |
| Dec 31, 06:00 | G1 Minor | 5 | 3 | 20 |
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.