Aurora & Space WeatherHome › Geomagnetic history › 1990
Geomagnetic storm on 27 May 1990 (G3)
Max Kp7-G3
Ap45No. 18 in 1990
Consecutive G1+ days2
Ap rank1,215since 1932
Kp by 3-hour slot (UTC)
4-
6+
7-
5+
3o
4+
3-
3o
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 24 May 1990 | 3+ | 8 | – |
| 25 May 1990 | 4+ | 20 | – |
| 26 May 1990 | 7+ | 47 | G3 |
| 27 May 1990 | 7- | 45 | G3 |
| 28 May 1990 | 3o | 7 | – |
| 29 May 1990 | 3+ | 10 | – |
| 30 May 1990 | 5o | 23 | G1 |
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 7-, Ap 45: No. 1,215 of 34,615 days since 1932 by Ap.