Geomagnetic Storms of 1997
21 geomagnetic storms of G1 or more began in 1997: 7 G1, 8 G2, 6 G3, 0 G4, 0 G5. The strongest began November 22, 1997 and reached Kp 7+, rank 336 of every storm since 1932.
By month
Every storm of 1997
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 10, 06:00 | G2 Moderate | 6 | 6 | 32 |
| Feb 8, 12:00 | G2 Moderate | 6- | 6 | 22 |
| Feb 9, 18:00 | G1 Minor | 5+ | 3 | 20 |
| Feb 27, 21:00 | G3 Strong | 7 | 9 | 37 |
| Mar 28, 15:00 | G2 Moderate | 6- | 6 | 21 |
| Apr 10, 21:00 | G3 Strong | 7- | 9 | 37 |
| Apr 16, 21:00 | G1 Minor | 5+ | 9 | 24 |
| Apr 22, 00:00 | G1 Minor | 5+ | 3 | 15 |
| May 1, 18:00 | G2 Moderate | 6+ | 9 | 29 |
| May 15, 06:00 | G3 Strong | 7- | 12 | 56 |
| May 27, 03:00 | G2 Moderate | 6 | 3 | 21 |
| Jun 9, 00:00 | G2 Moderate | 6- | 9 | 33 |
| Aug 3, 15:00 | G1 Minor | 5 | 3 | 21 |
| Sep 3, 18:00 | G2 Moderate | 6+ | 9 | 27 |
| Sep 18, 00:00 | G1 Minor | 5 | 6 | 20 |
| Sep 21, 21:00 | G1 Minor | 5 | 3 | 16 |
| Oct 1, 06:00 | G3 Strong | 7 | 12 | 46 |
| Oct 10, 21:00 | G2 Moderate | 6+ | 9 | 30 |
| Oct 24, 12:00 | G1 Minor | 5+ | 15 | 20 |
| Nov 6, 21:00 | G3 Strong | 7 | 12 | 44 |
| Nov 22, 09:00 | G3 Strong | 7+ | 27 | 59 |
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.