Aurora & Space WeatherHome › Geomagnetic history › 1973
Geomagnetic storm on 13 Apr 1973 (G3)
Max Kp7+G3
Ap46No. 23 in 1973
Consecutive G1+ days2
Ap rank1,135since 1932
Kp by 3-hour slot (UTC)
1+
4+
5-
6-
7+
5o
2o
3-
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 10 Apr 1973 | 1+ | 4 | – |
| 11 Apr 1973 | 5- | 24 | G1 |
| 12 Apr 1973 | 1o | 3 | – |
| 13 Apr 1973 | 7+ | 46 | G3 |
| 14 Apr 1973 | 8- | 57 | G4 |
| 15 Apr 1973 | 3- | 9 | – |
| 16 Apr 1973 | 6+ | 60 | G2 |
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 7+, Ap 46: No. 1,135 of 34,615 days since 1932 by Ap.