Geomagnetic Storms of 1965
16 geomagnetic storms of G1 or more began in 1965: 8 G1, 6 G2, 1 G3, 1 G4, 0 G5. The strongest began April 18, 1965 and reached Kp 8-, rank 271 of every storm since 1932.
By month
Every storm of 1965
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 22, 06:00 | G2 Moderate | 6- | 3 | 20 |
| Feb 7, 03:00 | G2 Moderate | 6- | 6 | 31 |
| Feb 8, 18:00 | G1 Minor | 5+ | 6 | 17 |
| Feb 25, 00:00 | G1 Minor | 5 | 3 | 14 |
| Mar 4, 03:00 | G2 Moderate | 6 | 3 | 21 |
| Mar 23, 18:00 | G1 Minor | 5 | 3 | 25 |
| Mar 25, 06:00 | G1 Minor | 5 | 3 | 20 |
| Apr 18, 03:00 | G4 Severe | 8- | 12 | 68 |
| May 5, 03:00 | G1 Minor | 5+ | 6 | 26 |
| May 16, 12:00 | G1 Minor | 5+ | 3 | 18 |
| Jun 16, 00:00 | G3 Strong | 7 | 30 | 73 |
| Jun 17, 21:00 | G2 Moderate | 6- | 3 | 34 |
| Aug 18, 18:00 | G2 Moderate | 6+ | 15 | 27 |
| Aug 20, 21:00 | G1 Minor | 5 | 3 | 17 |
| Sep 16, 00:00 | G1 Minor | 5+ | 15 | 35 |
| Sep 27, 21:00 | G2 Moderate | 6- | 6 | 27 |
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.