Geomagnetic Storms of 2009
3 geomagnetic storms of G1 or more began in 2009: 1 G1, 2 G2, 0 G3, 0 G4, 0 G5. The strongest began July 22, 2009 and reached Kp 6-, rank 1,954 of every storm since 1932.
By month
Every storm of 2009
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jun 24, 18:00 | G1 Minor | 5 | 3 | 16 |
| Jul 22, 03:00 | G2 Moderate | 6- | 6 | 24 |
| Aug 30, 15:00 | G2 Moderate | 6- | 3 | 20 |
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.