Geomagnetic Storms of 2018
10 geomagnetic storms of G1 or more began in 2018: 3 G1, 6 G2, 1 G3, 0 G4, 0 G5. The strongest began August 26, 2018 and reached Kp 7+, rank 354 of every storm since 1932.
By month
Every storm of 2018
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Feb 27, 03:00 | G1 Minor | 5+ | 3 | 18 |
| Mar 18, 21:00 | G2 Moderate | 6 | 3 | 23 |
| Apr 20, 06:00 | G2 Moderate | 6 | 15 | 43 |
| May 5, 21:00 | G2 Moderate | 6- | 6 | 27 |
| Jun 25, 21:00 | G1 Minor | 5 | 3 | 12 |
| Aug 26, 00:00 | G3 Strong | 7+ | 21 | 67 |
| Aug 27, 15:00 | G2 Moderate | 6- | 6 | 25 |
| Sep 10, 15:00 | G2 Moderate | 6 | 21 | 35 |
| Oct 7, 15:00 | G1 Minor | 5+ | 6 | 24 |
| Nov 4, 21:00 | G2 Moderate | 6- | 12 | 32 |
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.