Geomagnetic Storms of 1968
31 geomagnetic storms of G1 or more began in 1968: 14 G1, 13 G2, 2 G3, 2 G4, 0 G5. The strongest began October 31, 1968 and reached Kp 8+, rank 74 of every storm since 1932.
By month
Every storm of 1968
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 2, 06:00 | G2 Moderate | 6 | 6 | 35 |
| Feb 10, 15:00 | G2 Moderate | 6+ | 24 | 51 |
| Feb 15, 15:00 | G1 Minor | 5+ | 3 | 25 |
| Feb 20, 06:00 | G2 Moderate | 6 | 21 | 35 |
| Feb 28, 18:00 | G1 Minor | 5+ | 6 | 30 |
| Mar 14, 21:00 | G1 Minor | 5 | 12 | 29 |
| Mar 16, 12:00 | G2 Moderate | 6- | 3 | 26 |
| Apr 1, 03:00 | G1 Minor | 5 | 3 | 26 |
| Apr 5, 18:00 | G3 Strong | 7 | 18 | 36 |
| Apr 14, 09:00 | G1 Minor | 5 | 6 | 26 |
| Apr 26, 21:00 | G2 Moderate | 6- | 3 | 26 |
| May 7, 03:00 | G3 Strong | 7- | 15 | 53 |
| May 12, 00:00 | G2 Moderate | 6- | 6 | 27 |
| May 21, 15:00 | G1 Minor | 5 | 3 | 24 |
| May 24, 00:00 | G1 Minor | 5 | 3 | 19 |
| Jun 10, 06:00 | G4 Severe | 8 | 81 | 103 |
| Jun 14, 06:00 | G1 Minor | 5+ | 3 | 26 |
| Jun 17, 06:00 | G1 Minor | 5+ | 3 | 18 |
| Jul 10, 03:00 | G1 Minor | 5+ | 21 | 35 |
| Jul 13, 15:00 | G2 Moderate | 6 | 12 | 22 |
| Aug 16, 15:00 | G2 Moderate | 6 | 27 | 41 |
| Sep 7, 21:00 | G2 Moderate | 6- | 21 | 48 |
| Sep 13, 00:00 | G2 Moderate | 6- | 15 | 43 |
| Sep 15, 15:00 | G1 Minor | 5 | 3 | 30 |
| Oct 2, 00:00 | G2 Moderate | 6- | 36 | 47 |
| Oct 12, 03:00 | G2 Moderate | 6+ | 24 | 51 |
| Oct 29, 12:00 | G2 Moderate | 6 | 9 | 37 |
| Oct 31, 06:00 | G4 Severe | 8+ | 69 | 122 |
| Nov 4, 18:00 | G1 Minor | 5 | 3 | 27 |
| Dec 5, 06:00 | G1 Minor | 5+ | 6 | 25 |
| Dec 25, 03:00 | G1 Minor | 5 | 3 | 21 |
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 2026-09-25.