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Geomagnetic storm on 30 Mar 1990 (G4)
Max Kp8oG4
Ap69No. 10 in 1990
Consecutive G1+ days2
Ap rank432since 1932
Kp by 3-hour slot (UTC)
4+
5-
8o
7o
5+
5+
3+
2+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 27 Mar 1990 | 5+ | 34 | G1 |
| 28 Mar 1990 | 4+ | 24 | – |
| 29 Mar 1990 | 5+ | 27 | G1 |
| 30 Mar 1990 | 8o | 69 | G4 |
| 31 Mar 1990 | 2+ | 7 | – |
| 1 Apr 1990 | 2+ | 6 | – |
| 2 Apr 1990 | 3+ | 11 | – |
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 8o, Ap 69: No. 432 of 34,615 days since 1932 by Ap.