Geomagnetic Storms of 1942
60 geomagnetic storms of G1 or more began in 1942: 36 G1, 16 G2, 7 G3, 1 G4, 0 G5. The strongest began March 1, 1942 and reached Kp 8, rank 152 of every storm since 1932.
By month
Every storm of 1942
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 4, 03:00 | G1 Minor | 5 | 3 | 24 |
| Jan 19, 03:00 | G1 Minor | 5+ | 3 | 16 |
| Feb 5, 18:00 | G1 Minor | 5 | 3 | 22 |
| Feb 6, 09:00 | G1 Minor | 5 | 3 | 33 |
| Feb 23, 12:00 | G2 Moderate | 6 | 21 | 39 |
| Feb 28, 12:00 | G2 Moderate | 6 | 6 | 29 |
| Mar 1, 06:00 | G4 Severe | 8 | 24 | 111 |
| Mar 3, 06:00 | G2 Moderate | 6 | 12 | 42 |
| Mar 5, 15:00 | G3 Strong | 7 | 15 | 52 |
| Mar 8, 00:00 | G2 Moderate | 6+ | 6 | 39 |
| Mar 8, 18:00 | G2 Moderate | 6+ | 12 | 41 |
| Mar 13, 12:00 | G1 Minor | 5+ | 3 | 29 |
| Mar 14, 06:00 | G1 Minor | 5+ | 6 | 27 |
| Mar 20, 00:00 | G1 Minor | 5+ | 3 | 17 |
| Mar 26, 09:00 | G1 Minor | 5+ | 9 | 25 |
| Apr 2, 12:00 | G1 Minor | 5 | 3 | 26 |
| Apr 3, 03:00 | G2 Moderate | 6 | 3 | 30 |
| Apr 4, 06:00 | G3 Strong | 7+ | 15 | 70 |
| Apr 11, 00:00 | G2 Moderate | 6- | 15 | 42 |
| Apr 13, 21:00 | G2 Moderate | 6+ | 6 | 28 |
| Apr 17, 00:00 | G2 Moderate | 6+ | 12 | 47 |
| Apr 18, 12:00 | G1 Minor | 5+ | 3 | 33 |
| Apr 23, 12:00 | G1 Minor | 5+ | 6 | 27 |
| Apr 28, 00:00 | G2 Moderate | 6 | 3 | 18 |
| May 5, 00:00 | G2 Moderate | 6- | 3 | 18 |
| May 14, 06:00 | G1 Minor | 5 | 3 | 18 |
| May 28, 03:00 | G1 Minor | 5 | 3 | 17 |
| Jul 8, 09:00 | G1 Minor | 5+ | 12 | 32 |
| Jul 11, 03:00 | G2 Moderate | 6 | 15 | 47 |
| Jul 15, 18:00 | G1 Minor | 5+ | 6 | 29 |
| Aug 10, 15:00 | G1 Minor | 5+ | 6 | 24 |
| Aug 16, 03:00 | G1 Minor | 5 | 3 | 35 |
| Aug 16, 18:00 | G3 Strong | 7- | 3 | 35 |
| Aug 23, 12:00 | G2 Moderate | 6 | 12 | 43 |
| Aug 25, 03:00 | G1 Minor | 5 | 3 | 19 |
| Sep 2, 06:00 | G1 Minor | 5 | 3 | 17 |
| Sep 6, 21:00 | G1 Minor | 5 | 3 | 26 |
| Sep 11, 21:00 | G3 Strong | 7- | 15 | 54 |
| Sep 13, 21:00 | G1 Minor | 5 | 3 | 24 |
| Sep 14, 18:00 | G1 Minor | 5 | 6 | 31 |
| Sep 16, 21:00 | G1 Minor | 5+ | 21 | 34 |
| Sep 18, 18:00 | G1 Minor | 5 | 3 | 26 |
| Sep 20, 12:00 | G1 Minor | 5+ | 3 | 25 |
| Sep 21, 06:00 | G1 Minor | 5+ | 6 | 38 |
| Oct 2, 12:00 | G3 Strong | 7- | 30 | 48 |
| Oct 4, 15:00 | G1 Minor | 5+ | 3 | 31 |
| Oct 12, 09:00 | G2 Moderate | 6 | 6 | 36 |
| Oct 13, 15:00 | G2 Moderate | 6 | 3 | 33 |
| Oct 14, 12:00 | G1 Minor | 5+ | 12 | 34 |
| Oct 19, 00:00 | G1 Minor | 5 | 3 | 33 |
| Oct 19, 15:00 | G1 Minor | 5+ | 3 | 33 |
| Oct 28, 12:00 | G3 Strong | 7+ | 39 | 80 |
| Oct 30, 15:00 | G1 Minor | 5+ | 3 | 39 |
| Oct 31, 12:00 | G1 Minor | 5 | 3 | 30 |
| Nov 23, 21:00 | G3 Strong | 7- | 24 | 62 |
| Nov 25, 21:00 | G2 Moderate | 6- | 9 | 37 |
| Nov 26, 18:00 | G1 Minor | 5 | 3 | 37 |
| Dec 9, 21:00 | G1 Minor | 5+ | 6 | 23 |
| Dec 21, 03:00 | G1 Minor | 5 | 12 | 33 |
| Dec 23, 09:00 | G1 Minor | 5 | 6 | 31 |
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.