Geomagnetic Storms of 2003
78 geomagnetic storms of G1 or more began in 2003: 33 G1, 32 G2, 10 G3, 1 G4, 2 G5. The strongest began October 29, 2003 and reached Kp 9, rank 2 of every storm since 1932.
By month
Every storm of 2003
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 3, 15:00 | G1 Minor | 5 | 3 | 18 |
| Jan 22, 21:00 | G1 Minor | 5+ | 6 | 20 |
| Jan 25, 06:00 | G2 Moderate | 6- | 3 | 28 |
| Jan 30, 00:00 | G1 Minor | 5 | 3 | 25 |
| Feb 2, 00:00 | G2 Moderate | 6- | 27 | 53 |
| Feb 4, 03:00 | G2 Moderate | 6- | 6 | 31 |
| Feb 18, 03:00 | G1 Minor | 5+ | 3 | 21 |
| Feb 27, 00:00 | G1 Minor | 5 | 3 | 30 |
| Mar 3, 18:00 | G1 Minor | 5+ | 9 | 34 |
| Mar 14, 12:00 | G1 Minor | 5+ | 15 | 26 |
| Mar 16, 18:00 | G2 Moderate | 6 | 30 | 42 |
| Mar 21, 09:00 | G1 Minor | 5 | 15 | 30 |
| Mar 23, 09:00 | G1 Minor | 5 | 3 | 22 |
| Mar 28, 21:00 | G2 Moderate | 6- | 6 | 37 |
| Mar 29, 18:00 | G1 Minor | 5+ | 9 | 39 |
| Mar 30, 18:00 | G2 Moderate | 6- | 6 | 39 |
| Mar 31, 12:00 | G2 Moderate | 6+ | 9 | 43 |
| Apr 4, 21:00 | G1 Minor | 5 | 3 | 29 |
| Apr 5, 18:00 | G1 Minor | 5+ | 3 | 29 |
| Apr 16, 09:00 | G1 Minor | 5+ | 12 | 33 |
| Apr 17, 09:00 | G1 Minor | 5 | 3 | 28 |
| Apr 24, 21:00 | G1 Minor | 5 | 9 | 33 |
| Apr 25, 21:00 | G1 Minor | 5+ | 3 | 33 |
| Apr 29, 15:00 | G3 Strong | 7- | 39 | 45 |
| May 2, 03:00 | G1 Minor | 5 | 3 | 15 |
| May 6, 12:00 | G2 Moderate | 6- | 21 | 38 |
| May 8, 15:00 | G3 Strong | 7- | 42 | 42 |
| May 11, 06:00 | G2 Moderate | 6- | 9 | 31 |
| May 14, 15:00 | G1 Minor | 5 | 3 | 29 |
| May 21, 18:00 | G2 Moderate | 6 | 9 | 29 |
| May 27, 18:00 | G2 Moderate | 6- | 9 | 34 |
| May 29, 12:00 | G4 Severe | 8+ | 42 | 109 |
| Jun 2, 03:00 | G1 Minor | 5+ | 21 | 38 |
| Jun 3, 21:00 | G1 Minor | 5+ | 3 | 29 |
| Jun 8, 15:00 | G2 Moderate | 6- | 9 | 37 |
| Jun 9, 21:00 | G2 Moderate | 6 | 12 | 28 |
| Jun 14, 15:00 | G1 Minor | 5 | 3 | 28 |
| Jun 16, 09:00 | G3 Strong | 7- | 57 | 60 |
| Jun 27, 12:00 | G1 Minor | 5 | 3 | 31 |
| Jun 28, 09:00 | G2 Moderate | 6+ | 6 | 42 |
| Jul 3, 18:00 | G1 Minor | 5 | 3 | 19 |
| Jul 11, 06:00 | G3 Strong | 7- | 27 | 52 |
| Jul 15, 00:00 | G1 Minor | 5 | 3 | 28 |
| Jul 16, 06:00 | G2 Moderate | 6 | 18 | 48 |
| Jul 19, 21:00 | G2 Moderate | 6- | 3 | 30 |
| Jul 26, 15:00 | G2 Moderate | 6 | 12 | 33 |
| Jul 28, 12:00 | G1 Minor | 5+ | 3 | 21 |
| Jul 29, 12:00 | G1 Minor | 5+ | 12 | 38 |
| Jul 31, 09:00 | G2 Moderate | 6- | 3 | 35 |
| Aug 1, 00:00 | G1 Minor | 5+ | 24 | 39 |
| Aug 6, 00:00 | G2 Moderate | 6- | 9 | 32 |
| Aug 7, 15:00 | G3 Strong | 7- | 15 | 33 |
| Aug 17, 21:00 | G3 Strong | 7+ | 30 | 108 |
| Aug 20, 21:00 | G2 Moderate | 6 | 60 | 58 |
| Aug 29, 18:00 | G1 Minor | 5 | 3 | 16 |
| Sep 10, 00:00 | G1 Minor | 5 | 3 | 21 |
| Sep 16, 12:00 | G3 Strong | 7 | 75 | 70 |
| Sep 24, 00:00 | G2 Moderate | 6- | 9 | 41 |
| Oct 14, 06:00 | G3 Strong | 7+ | 45 | 67 |
| Oct 17, 03:00 | G2 Moderate | 6- | 6 | 32 |
| Oct 19, 18:00 | G2 Moderate | 6- | 30 | 37 |
| Oct 21, 12:00 | G2 Moderate | 6 | 30 | 49 |
| Oct 24, 15:00 | G3 Strong | 7- | 9 | 38 |
| Oct 29, 06:00 | G5 Extreme | 9 | 69 | 204 |
| Nov 4, 06:00 | G3 Strong | 7 | 6 | 38 |
| Nov 6, 18:00 | G2 Moderate | 6- | 3 | 17 |
| Nov 9, 12:00 | G2 Moderate | 6- | 9 | 29 |
| Nov 11, 00:00 | G2 Moderate | 6 | 21 | 61 |
| Nov 12, 15:00 | G2 Moderate | 6 | 39 | 52 |
| Nov 15, 06:00 | G2 Moderate | 6 | 12 | 41 |
| Nov 16, 06:00 | G1 Minor | 5+ | 45 | 41 |
| Nov 20, 06:00 | G5 Extreme | 9- | 27 | 150 |
| Nov 22, 18:00 | G2 Moderate | 6 | 12 | 30 |
| Dec 5, 03:00 | G2 Moderate | 6- | 12 | 39 |
| Dec 8, 18:00 | G1 Minor | 5+ | 3 | 35 |
| Dec 9, 21:00 | G1 Minor | 5+ | 6 | 41 |
| Dec 10, 15:00 | G2 Moderate | 6- | 21 | 41 |
| Dec 14, 15:00 | G1 Minor | 5 | 3 | 27 |
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.