Geomagnetic Storms of 1934
20 geomagnetic storms of G1 or more began in 1934: 12 G1, 8 G2, 0 G3, 0 G4, 0 G5. The strongest began September 24, 1934 and reached Kp 6+, rank 834 of every storm since 1932.
By month
Every storm of 1934
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 1, 15:00 | G1 Minor | 5+ | 6 | 20 |
| Feb 9, 00:00 | G1 Minor | 5 | 6 | 26 |
| Feb 16, 12:00 | G2 Moderate | 6- | 9 | 24 |
| Mar 4, 21:00 | G2 Moderate | 6 | 12 | 32 |
| Mar 22, 21:00 | G1 Minor | 5 | 3 | 17 |
| Mar 25, 00:00 | G1 Minor | 5+ | 3 | 22 |
| Mar 31, 06:00 | G1 Minor | 5 | 3 | 24 |
| Apr 4, 21:00 | G1 Minor | 5 | 3 | 15 |
| Apr 5, 15:00 | G1 Minor | 5 | 3 | 18 |
| May 2, 21:00 | G1 Minor | 5+ | 3 | 17 |
| May 11, 21:00 | G2 Moderate | 6+ | 3 | 17 |
| May 18, 12:00 | G2 Moderate | 6 | 6 | 29 |
| Jul 3, 12:00 | G1 Minor | 5+ | 3 | 18 |
| Jul 30, 06:00 | G2 Moderate | 6- | 9 | 31 |
| Aug 27, 03:00 | G1 Minor | 5 | 3 | 21 |
| Sep 22, 00:00 | G1 Minor | 5 | 3 | 11 |
| Sep 24, 21:00 | G2 Moderate | 6+ | 24 | 54 |
| Oct 24, 03:00 | G1 Minor | 5 | 3 | 25 |
| Dec 3, 21:00 | G2 Moderate | 6+ | 12 | 40 |
| Dec 29, 18:00 | G2 Moderate | 6- | 3 | 24 |
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.