Geomagnetic Storms of 1969
29 geomagnetic storms of G1 or more began in 1969: 11 G1, 12 G2, 2 G3, 4 G4, 0 G5. The strongest began September 28, 1969 and reached Kp 8, rank 139 of every storm since 1932.
By month
Every storm of 1969
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 26, 00:00 | G2 Moderate | 6- | 3 | 23 |
| Feb 2, 18:00 | G4 Severe | 8 | 30 | 54 |
| Feb 10, 21:00 | G2 Moderate | 6+ | 27 | 62 |
| Feb 27, 12:00 | G2 Moderate | 6+ | 6 | 32 |
| Mar 11, 21:00 | G2 Moderate | 6 | 12 | 39 |
| Mar 17, 00:00 | G2 Moderate | 6- | 6 | 38 |
| Mar 19, 21:00 | G1 Minor | 5+ | 6 | 22 |
| Mar 23, 18:00 | G4 Severe | 8 | 21 | 79 |
| Mar 25, 06:00 | G1 Minor | 5 | 3 | 22 |
| Apr 1, 18:00 | G2 Moderate | 6- | 6 | 24 |
| Apr 3, 00:00 | G1 Minor | 5+ | 3 | 17 |
| Apr 14, 00:00 | G1 Minor | 5 | 3 | 16 |
| Apr 28, 03:00 | G3 Strong | 7+ | 12 | 60 |
| Apr 30, 03:00 | G1 Minor | 5 | 3 | 27 |
| May 2, 18:00 | G2 Moderate | 6+ | 3 | 28 |
| May 13, 00:00 | G2 Moderate | 6- | 27 | 50 |
| May 14, 18:00 | G4 Severe | 8- | 42 | 131 |
| May 18, 18:00 | G1 Minor | 5 | 3 | 20 |
| Jun 12, 03:00 | G1 Minor | 5 | 3 | 18 |
| Jun 14, 06:00 | G2 Moderate | 6- | 9 | 32 |
| Jul 1, 06:00 | G1 Minor | 5 | 3 | 17 |
| Jul 26, 12:00 | G3 Strong | 7 | 21 | 45 |
| Aug 26, 09:00 | G1 Minor | 5 | 3 | 15 |
| Aug 27, 03:00 | G2 Moderate | 6 | 3 | 21 |
| Sep 8, 06:00 | G1 Minor | 5 | 3 | 19 |
| Sep 28, 09:00 | G4 Severe | 8 | 60 | 90 |
| Oct 2, 15:00 | G1 Minor | 5+ | 3 | 31 |
| Nov 9, 03:00 | G2 Moderate | 6- | 15 | 41 |
| Nov 10, 06:00 | G2 Moderate | 6- | 9 | 37 |
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.