Geomagnetic Storms of 1989
70 geomagnetic storms of G1 or more began in 1989: 29 G1, 25 G2, 12 G3, 3 G4, 1 G5. The strongest began March 13, 1989 and reached Kp 9, rank 5 of every storm since 1932.
By month
Every storm of 1989
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 5, 03:00 | G2 Moderate | 6- | 6 | 33 |
| Jan 11, 15:00 | G2 Moderate | 6+ | 12 | 37 |
| Jan 15, 18:00 | G2 Moderate | 6- | 15 | 43 |
| Jan 17, 09:00 | G1 Minor | 5 | 3 | 28 |
| Jan 20, 12:00 | G3 Strong | 7- | 12 | 45 |
| Jan 22, 12:00 | G1 Minor | 5+ | 3 | 30 |
| Jan 31, 18:00 | G2 Moderate | 6 | 6 | 32 |
| Feb 1, 21:00 | G1 Minor | 5+ | 3 | 29 |
| Feb 2, 18:00 | G2 Moderate | 6- | 24 | 44 |
| Mar 2, 03:00 | G2 Moderate | 6- | 3 | 25 |
| Mar 3, 03:00 | G2 Moderate | 6- | 15 | 37 |
| Mar 5, 06:00 | G1 Minor | 5+ | 6 | 30 |
| Mar 8, 18:00 | G2 Moderate | 6- | 12 | 31 |
| Mar 12, 00:00 | G1 Minor | 5 | 3 | 23 |
| Mar 13, 00:00 | G5 Extreme | 9 | 60 | 246 |
| Mar 16, 03:00 | G3 Strong | 7- | 30 | 50 |
| Mar 18, 15:00 | G1 Minor | 5+ | 3 | 15 |
| Mar 19, 06:00 | G3 Strong | 7- | 12 | 55 |
| Mar 22, 18:00 | G2 Moderate | 6 | 6 | 39 |
| Mar 23, 12:00 | G2 Moderate | 6- | 15 | 36 |
| Mar 27, 12:00 | G3 Strong | 7 | 129 | 71 |
| Apr 2, 15:00 | G1 Minor | 5 | 3 | 26 |
| Apr 4, 15:00 | G2 Moderate | 6 | 18 | 46 |
| Apr 14, 21:00 | G2 Moderate | 6- | 9 | 27 |
| Apr 16, 21:00 | G1 Minor | 5 | 3 | 20 |
| Apr 25, 15:00 | G3 Strong | 7- | 78 | 76 |
| Apr 29, 18:00 | G1 Minor | 5 | 3 | 28 |
| May 4, 21:00 | G3 Strong | 7- | 12 | 44 |
| May 7, 06:00 | G2 Moderate | 6 | 18 | 46 |
| May 23, 12:00 | G3 Strong | 7+ | 36 | 68 |
| Jun 4, 03:00 | G1 Minor | 5 | 3 | 14 |
| Jun 7, 00:00 | G2 Moderate | 6 | 12 | 35 |
| Jun 8, 18:00 | G2 Moderate | 6+ | 9 | 34 |
| Jun 9, 21:00 | G3 Strong | 7 | 24 | 78 |
| Jun 14, 09:00 | G2 Moderate | 6 | 36 | 50 |
| Jun 20, 12:00 | G1 Minor | 5+ | 9 | 28 |
| Jul 1, 15:00 | G2 Moderate | 6+ | 6 | 26 |
| Aug 10, 06:00 | G2 Moderate | 6 | 21 | 41 |
| Aug 14, 06:00 | G3 Strong | 7- | 48 | 77 |
| Aug 17, 12:00 | G2 Moderate | 6- | 24 | 34 |
| Aug 20, 06:00 | G1 Minor | 5 | 9 | 26 |
| Aug 21, 18:00 | G1 Minor | 5+ | 6 | 21 |
| Aug 23, 12:00 | G1 Minor | 5+ | 9 | 28 |
| Aug 27, 18:00 | G2 Moderate | 6- | 3 | 26 |
| Aug 28, 21:00 | G3 Strong | 7+ | 12 | 58 |
| Sep 4, 00:00 | G2 Moderate | 6 | 6 | 30 |
| Sep 5, 06:00 | G1 Minor | 5+ | 3 | 21 |
| Sep 7, 15:00 | G2 Moderate | 6- | 3 | 23 |
| Sep 15, 18:00 | G2 Moderate | 6+ | 12 | 42 |
| Sep 18, 15:00 | G4 Severe | 8 | 21 | 70 |
| Sep 26, 12:00 | G3 Strong | 7 | 12 | 54 |
| Oct 19, 00:00 | G1 Minor | 5+ | 3 | 25 |
| Oct 20, 09:00 | G4 Severe | 8+ | 72 | 146 |
| Oct 25, 00:00 | G1 Minor | 5 | 6 | 23 |
| Oct 26, 18:00 | G1 Minor | 5 | 3 | 24 |
| Oct 30, 00:00 | G1 Minor | 5 | 3 | 23 |
| Nov 2, 18:00 | G1 Minor | 5 | 3 | 21 |
| Nov 4, 06:00 | G1 Minor | 5 | 6 | 28 |
| Nov 9, 15:00 | G1 Minor | 5 | 3 | 25 |
| Nov 13, 03:00 | G1 Minor | 5+ | 18 | 43 |
| Nov 17, 09:00 | G4 Severe | 8 | 24 | 109 |
| Nov 27, 21:00 | G1 Minor | 5 | 3 | 16 |
| Dec 1, 00:00 | G1 Minor | 5 | 3 | 38 |
| Dec 1, 15:00 | G2 Moderate | 6 | 6 | 38 |
| Dec 4, 00:00 | G1 Minor | 5+ | 6 | 31 |
| Dec 4, 21:00 | G1 Minor | 5+ | 6 | 31 |
| Dec 22, 12:00 | G1 Minor | 5+ | 9 | 27 |
| Dec 26, 18:00 | G1 Minor | 5 | 3 | 22 |
| Dec 29, 09:00 | G3 Strong | 7- | 18 | 51 |
| Dec 31, 03:00 | G2 Moderate | 6- | 6 | 35 |
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.