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Geomagnetic storm on 23 Aug 1990 (G3)
Max Kp7oG3
Ap77No. 6 in 1990
Consecutive G1+ days5
Ap rank340since 1932
Kp by 3-hour slot (UTC)
4+
6+
5+
6o
7o
6+
6+
4+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 20 Aug 1990 | 5- | 19 | G1 |
| 21 Aug 1990 | 6o | 38 | G2 |
| 22 Aug 1990 | 6- | 49 | G2 |
| 23 Aug 1990 | 7o | 77 | G3 |
| 24 Aug 1990 | 5+ | 24 | G1 |
| 25 Aug 1990 | 3- | 6 | – |
| 26 Aug 1990 | 7- | 63 | G3 |
Highest-Ap days of 1990
124
102
99
89
79
77
76
75
70
69
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 7o, Ap 77: No. 340 of 34,615 days since 1932 by Ap.