Geomagnetic Storms of 1988
35 geomagnetic storms of G1 or more began in 1988: 19 G1, 10 G2, 4 G3, 2 G4, 0 G5. The strongest began April 3, 1988 and reached Kp 8, rank 154 of every storm since 1932.
By month
Every storm of 1988
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 2, 09:00 | G1 Minor | 5+ | 12 | 29 |
| Jan 4, 21:00 | G1 Minor | 5+ | 3 | 14 |
| Jan 6, 15:00 | G2 Moderate | 6 | 12 | 31 |
| Jan 12, 12:00 | G1 Minor | 5 | 3 | 21 |
| Jan 14, 03:00 | G3 Strong | 7+ | 33 | 63 |
| Feb 5, 06:00 | G1 Minor | 5 | 3 | 29 |
| Feb 21, 21:00 | G3 Strong | 7+ | 33 | 97 |
| Mar 8, 03:00 | G1 Minor | 5 | 6 | 26 |
| Mar 26, 18:00 | G3 Strong | 7 | 9 | 49 |
| Mar 27, 18:00 | G1 Minor | 5+ | 3 | 34 |
| Mar 28, 18:00 | G2 Moderate | 6 | 36 | 34 |
| Apr 3, 06:00 | G4 Severe | 8 | 45 | 78 |
| Apr 5, 21:00 | G2 Moderate | 6+ | 15 | 49 |
| Apr 22, 03:00 | G1 Minor | 5+ | 24 | 44 |
| May 5, 21:00 | G3 Strong | 7+ | 24 | 106 |
| May 17, 12:00 | G1 Minor | 5 | 15 | 24 |
| Jun 25, 15:00 | G1 Minor | 5 | 3 | 27 |
| Jun 29, 18:00 | G1 Minor | 5 | 3 | 26 |
| Jul 16, 12:00 | G1 Minor | 5 | 3 | 22 |
| Jul 21, 06:00 | G2 Moderate | 6- | 6 | 26 |
| Aug 20, 12:00 | G1 Minor | 5 | 3 | 17 |
| Aug 22, 00:00 | G2 Moderate | 6 | 6 | 24 |
| Sep 11, 06:00 | G2 Moderate | 6 | 21 | 51 |
| Sep 18, 00:00 | G2 Moderate | 6 | 6 | 34 |
| Sep 18, 21:00 | G1 Minor | 5+ | 3 | 34 |
| Oct 6, 00:00 | G1 Minor | 5 | 3 | 39 |
| Oct 6, 15:00 | G2 Moderate | 6- | 6 | 39 |
| Oct 10, 06:00 | G4 Severe | 8- | 18 | 85 |
| Oct 18, 15:00 | G1 Minor | 5 | 3 | 30 |
| Nov 2, 15:00 | G1 Minor | 5+ | 6 | 30 |
| Nov 30, 09:00 | G2 Moderate | 6+ | 9 | 37 |
| Dec 12, 03:00 | G1 Minor | 5 | 3 | 14 |
| Dec 16, 15:00 | G1 Minor | 5 | 3 | 25 |
| Dec 17, 18:00 | G2 Moderate | 6+ | 6 | 35 |
| Dec 26, 09:00 | G1 Minor | 5 | 3 | 25 |
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.