Geomagnetic Storms of 1935
25 geomagnetic storms of G1 or more began in 1935: 14 G1, 11 G2, 0 G3, 0 G4, 0 G5. The strongest began September 11, 1935 and reached Kp 6+, rank 845 of every storm since 1932.
By month
Every storm of 1935
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 17, 00:00 | G1 Minor | 5+ | 3 | 28 |
| Jan 28, 00:00 | G1 Minor | 5+ | 3 | 18 |
| Feb 2, 03:00 | G1 Minor | 5+ | 3 | 24 |
| Feb 13, 21:00 | G2 Moderate | 6 | 6 | 29 |
| Mar 13, 18:00 | G2 Moderate | 6 | 24 | 42 |
| Apr 9, 03:00 | G1 Minor | 5 | 3 | 16 |
| Apr 10, 15:00 | G2 Moderate | 6- | 33 | 51 |
| Apr 13, 00:00 | G1 Minor | 5 | 3 | 25 |
| May 1, 12:00 | G2 Moderate | 6+ | 12 | 30 |
| May 20, 03:00 | G1 Minor | 5 | 3 | 17 |
| Jun 7, 15:00 | G2 Moderate | 6+ | 12 | 30 |
| Jun 9, 12:00 | G1 Minor | 5 | 3 | 26 |
| Jun 18, 18:00 | G2 Moderate | 6+ | 3 | 32 |
| Jul 8, 06:00 | G1 Minor | 5 | 3 | 18 |
| Jul 24, 21:00 | G1 Minor | 5+ | 9 | 32 |
| Aug 27, 18:00 | G1 Minor | 5 | 3 | 12 |
| Sep 11, 12:00 | G2 Moderate | 6+ | 18 | 50 |
| Sep 17, 00:00 | G1 Minor | 5 | 3 | 23 |
| Sep 23, 12:00 | G2 Moderate | 6- | 15 | 28 |
| Sep 25, 03:00 | G2 Moderate | 6 | 9 | 46 |
| Oct 20, 09:00 | G2 Moderate | 6 | 9 | 35 |
| Oct 21, 15:00 | G1 Minor | 5+ | 9 | 34 |
| Oct 24, 06:00 | G2 Moderate | 6 | 12 | 40 |
| Oct 27, 21:00 | G1 Minor | 5+ | 3 | 24 |
| Dec 28, 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.