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Geomagnetic storm on 21 May 1973 (G3)
Max Kp7oG3
Ap48No. 20 in 1973
Consecutive G1+ days2
Ap rank1,022since 1932
Kp by 3-hour slot (UTC)
4o
5o
7o
6+
5-
3-
2-
4-
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 18 May 1973 | 5- | 22 | G1 |
| 19 May 1973 | 4+ | 22 | – |
| 20 May 1973 | 4+ | 24 | – |
| 21 May 1973 | 7o | 48 | G3 |
| 22 May 1973 | 5o | 21 | G1 |
| 23 May 1973 | 4- | 14 | – |
| 24 May 1973 | 2- | 4 | – |
Highest-Ap days of 1973
91
86
82
80
80
63
60
59
58
57
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 48: No. 1,022 of 34,615 days since 1932 by Ap.