Geomagnetic Storms of 1944
43 geomagnetic storms of G1 or more began in 1944: 23 G1, 16 G2, 2 G3, 2 G4, 0 G5. The strongest began December 16, 1944 and reached Kp 8+, rank 102 of every storm since 1932.
By month
Every storm of 1944
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 1, 12:00 | G1 Minor | 5 | 3 | 19 |
| Jan 10, 21:00 | G2 Moderate | 6- | 3 | 15 |
| Jan 11, 15:00 | G2 Moderate | 6- | 6 | 32 |
| Jan 13, 00:00 | G1 Minor | 5 | 3 | 30 |
| Jan 14, 15:00 | G2 Moderate | 6- | 3 | 29 |
| Feb 7, 09:00 | G2 Moderate | 6 | 18 | 40 |
| Feb 8, 21:00 | G1 Minor | 5+ | 3 | 30 |
| Feb 13, 21:00 | G3 Strong | 7- | 15 | 49 |
| Mar 4, 09:00 | G2 Moderate | 6- | 3 | 26 |
| Mar 7, 12:00 | G1 Minor | 5+ | 6 | 31 |
| Mar 8, 18:00 | G1 Minor | 5 | 3 | 21 |
| Mar 9, 09:00 | G1 Minor | 5 | 3 | 29 |
| Mar 10, 06:00 | G1 Minor | 5+ | 9 | 40 |
| Mar 12, 15:00 | G1 Minor | 5 | 3 | 26 |
| Mar 18, 21:00 | G2 Moderate | 6+ | 9 | 33 |
| Mar 26, 06:00 | G3 Strong | 7+ | 30 | 61 |
| Mar 29, 03:00 | G1 Minor | 5 | 6 | 25 |
| Apr 2, 03:00 | G4 Severe | 8+ | 27 | 88 |
| Apr 4, 09:00 | G1 Minor | 5+ | 3 | 24 |
| Apr 6, 06:00 | G1 Minor | 5 | 6 | 26 |
| Apr 7, 21:00 | G1 Minor | 5 | 3 | 23 |
| Apr 8, 12:00 | G1 Minor | 5+ | 3 | 17 |
| Apr 10, 03:00 | G2 Moderate | 6- | 6 | 26 |
| Apr 16, 00:00 | G1 Minor | 5+ | 3 | 35 |
| Apr 16, 15:00 | G2 Moderate | 6- | 3 | 35 |
| Apr 30, 06:00 | G1 Minor | 5+ | 3 | 22 |
| May 1, 12:00 | G2 Moderate | 6 | 24 | 35 |
| May 4, 18:00 | G1 Minor | 5 | 6 | 20 |
| May 29, 21:00 | G2 Moderate | 6 | 3 | 25 |
| Aug 2, 21:00 | G2 Moderate | 6+ | 12 | 42 |
| Aug 18, 06:00 | G2 Moderate | 6- | 3 | 20 |
| Aug 28, 06:00 | G1 Minor | 5 | 3 | 20 |
| Sep 21, 00:00 | G1 Minor | 5+ | 3 | 19 |
| Sep 24, 00:00 | G1 Minor | 5+ | 3 | 27 |
| Sep 30, 15:00 | G2 Moderate | 6 | 6 | 32 |
| Oct 11, 00:00 | G2 Moderate | 6 | 18 | 33 |
| Oct 14, 21:00 | G2 Moderate | 6+ | 9 | 36 |
| Oct 15, 21:00 | G1 Minor | 5+ | 3 | 36 |
| Nov 5, 03:00 | G1 Minor | 5 | 3 | 29 |
| Nov 5, 21:00 | G1 Minor | 5+ | 3 | 29 |
| Dec 14, 03:00 | G1 Minor | 5 | 3 | 19 |
| Dec 16, 09:00 | G4 Severe | 8+ | 39 | 83 |
| Dec 27, 15:00 | G2 Moderate | 6- | 12 | 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.