Home › Geomagnetic history › 1991
Geomagnetic storm on 26 Mar 1991 (G4)
Max Kp8oG4
Ap114No. 10 in 1991
Consecutive G1+ days4
Ap rank121since 1932
Kp by 3-hour slot (UTC)
7o
7+
7o
7-
8o
6o
5+
5-
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 23 Mar 1991 | 4- | 11 | – |
| 24 Mar 1991 | 9- | 161 | G5 |
| 25 Mar 1991 | 9- | 130 | G5 |
| 26 Mar 1991 | 8o | 114 | G4 |
| 27 Mar 1991 | 5- | 31 | G1 |
| 28 Mar 1991 | 4+ | 20 | – |
| 29 Mar 1991 | 2+ | 4 | – |
Highest-Ap days of 1991
196
161
134
130
128
120
119
119
117
114
Dates and time slots are UTC. Kp is the 3-hourly planetary geomagnetic index (0–9); Ap is the daily average disturbance. G1–G5 follow the NOAA storm scale (Kp 5- and above counted as G1). Aurora visibility also depends on weather and location. The latest values are preliminary.
About this page
Max Kp 8o, Ap 114: No. 121 of 34,615 days since 1932 by Ap.