Geomagnetic storms in 1991
In 1991, the maximum daily Kp reached storm level (Kp 5 or more) on 141 days. 38 days were strong (Kp 7 or more) and 5 extreme (Kp 9).
Max Kp9−
Storm days (Kp ≥ 5)141
Strong (Kp ≥ 7)38
Extreme (Kp 9)5
Storm days by month
Strongest storms
| Date | Max Kp | Daily Ap |
|---|---|---|
| June 5, 1991 | 9− | 196 |
| March 24, 1991 | 9− | 161 |
| July 13, 1991 | 9− | 134 |
| March 25, 1991 | 9− | 130 |
| October 29, 1991 | 8+ | 128 |
| June 13, 1991 | 8− | 120 |
| November 9, 1991 | 8+ | 119 |
| June 10, 1991 | 8− | 119 |
| July 9, 1991 | 8 | 117 |
| March 26, 1991 | 8 | 114 |
GFZ Potsdam, Kp index (CC BY 4.0), doi:10.5880/Kp.0001.