Geomagnetic Storms of 2023
32 geomagnetic storms of G1 or more began in 2023: 17 G1, 10 G2, 3 G3, 2 G4, 0 G5. The strongest began April 23, 2023 and reached Kp 8+, rank 111 of every storm since 1932.
By month
Every storm of 2023
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 15, 21:00 | G1 Minor | 5 | 3 | 28 |
| Feb 15, 06:00 | G1 Minor | 5+ | 3 | 27 |
| Feb 16, 06:00 | G1 Minor | 5 | 3 | 23 |
| Feb 26, 18:00 | G3 Strong | 7- | 33 | 91 |
| Mar 15, 03:00 | G2 Moderate | 6- | 3 | 30 |
| Mar 15, 21:00 | G2 Moderate | 6- | 3 | 30 |
| Mar 23, 12:00 | G4 Severe | 8 | 21 | 73 |
| Mar 30, 18:00 | G1 Minor | 5 | 3 | 18 |
| Apr 23, 15:00 | G4 Severe | 8+ | 21 | 72 |
| May 6, 03:00 | G2 Moderate | 6 | 3 | 29 |
| May 10, 03:00 | G1 Minor | 5+ | 3 | 24 |
| May 12, 12:00 | G1 Minor | 5+ | 3 | 18 |
| May 20, 00:00 | G2 Moderate | 6- | 6 | 32 |
| May 21, 18:00 | G2 Moderate | 6- | 6 | 26 |
| Jun 15, 15:00 | G2 Moderate | 6 | 15 | 32 |
| Jun 25, 00:00 | G1 Minor | 5 | 3 | 16 |
| Aug 5, 00:00 | G2 Moderate | 6+ | 9 | 33 |
| Sep 2, 12:00 | G1 Minor | 5+ | 15 | 37 |
| Sep 12, 12:00 | G1 Minor | 5+ | 6 | 23 |
| Sep 18, 15:00 | G2 Moderate | 6+ | 27 | 47 |
| Sep 24, 18:00 | G2 Moderate | 6- | 9 | 23 |
| Sep 26, 12:00 | G1 Minor | 5 | 3 | 28 |
| Oct 5, 03:00 | G1 Minor | 5 | 3 | 15 |
| Oct 21, 06:00 | G1 Minor | 5 | 3 | 21 |
| Nov 5, 09:00 | G3 Strong | 7+ | 21 | 61 |
| Nov 6, 18:00 | G1 Minor | 5+ | 9 | 36 |
| Nov 13, 00:00 | G1 Minor | 5 | 3 | 15 |
| Nov 22, 03:00 | G1 Minor | 5+ | 6 | 30 |
| Nov 25, 18:00 | G2 Moderate | 6+ | 3 | 37 |
| Dec 1, 09:00 | G3 Strong | 7- | 18 | 52 |
| Dec 17, 12:00 | G1 Minor | 5+ | 6 | 33 |
| Dec 18, 06:00 | G1 Minor | 5+ | 3 | 23 |
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.