Geomagnetic Storms of 1967
34 geomagnetic storms of G1 or more began in 1967: 17 G1, 7 G2, 6 G3, 3 G4, 1 G5. The strongest began May 25, 1967 and reached Kp 9, rank 14 of every storm since 1932.
By month
Every storm of 1967
Times are UT, when the first block at Kp 5 or more began.
| Began (UTC) | Level | Peak Kp | Hours | Highest daily Ap |
|---|---|---|---|---|
| Jan 1, 15:00 | G1 Minor | 5+ | 3 | 18 |
| Jan 7, 15:00 | G3 Strong | 7- | 27 | 60 |
| Jan 13, 12:00 | G4 Severe | 8- | 24 | 61 |
| Feb 7, 15:00 | G2 Moderate | 6+ | 15 | 46 |
| Feb 16, 06:00 | G4 Severe | 8 | 9 | 64 |
| Mar 18, 15:00 | G2 Moderate | 6+ | 3 | 23 |
| Mar 19, 15:00 | G1 Minor | 5+ | 3 | 26 |
| Apr 4, 12:00 | G1 Minor | 5 | 3 | 15 |
| Apr 23, 15:00 | G1 Minor | 5+ | 15 | 29 |
| May 2, 09:00 | G1 Minor | 5+ | 3 | 25 |
| May 3, 00:00 | G3 Strong | 7 | 21 | 87 |
| May 25, 09:00 | G5 Extreme | 9 | 30 | 146 |
| May 28, 09:00 | G3 Strong | 7- | 30 | 55 |
| May 30, 12:00 | G3 Strong | 7 | 21 | 43 |
| Jun 5, 18:00 | G4 Severe | 8 | 12 | 46 |
| Jun 6, 21:00 | G3 Strong | 7- | 6 | 46 |
| Jun 25, 18:00 | G2 Moderate | 6 | 9 | 24 |
| Jun 27, 03:00 | G1 Minor | 5 | 3 | 19 |
| Jul 30, 03:00 | G1 Minor | 5 | 3 | 17 |
| Aug 11, 15:00 | G1 Minor | 5 | 3 | 25 |
| Aug 17, 09:00 | G1 Minor | 5 | 3 | 19 |
| Sep 13, 09:00 | G1 Minor | 5 | 9 | 29 |
| Sep 20, 12:00 | G3 Strong | 7+ | 36 | 85 |
| Sep 28, 06:00 | G1 Minor | 5+ | 60 | 45 |
| Oct 9, 21:00 | G1 Minor | 5+ | 6 | 33 |
| Oct 28, 21:00 | G1 Minor | 5+ | 3 | 25 |
| Oct 29, 12:00 | G1 Minor | 5+ | 18 | 25 |
| Nov 3, 15:00 | G1 Minor | 5+ | 3 | 23 |
| Nov 11, 21:00 | G2 Moderate | 6- | 3 | 17 |
| Dec 1, 09:00 | G2 Moderate | 6- | 18 | 33 |
| Dec 5, 21:00 | G1 Minor | 5 | 3 | 13 |
| Dec 8, 18:00 | G1 Minor | 5+ | 3 | 26 |
| Dec 19, 18:00 | G2 Moderate | 6- | 12 | 32 |
| Dec 31, 03:00 | G2 Moderate | 6 | 21 | 59 |
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.