Aurora & Space WeatherHome › Geomagnetic history › 1971
Geomagnetic storm on 17 Dec 1971 (G3)
Max Kp7+G3
Ap67No. 2 in 1971
Consecutive G1+ days2
Ap rank460since 1932
Kp by 3-hour slot (UTC)
5+
5+
4+
3+
4+
7o
7+
5+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 14 Dec 1971 | 1+ | 3 | – |
| 15 Dec 1971 | 2o | 3 | – |
| 16 Dec 1971 | 4+ | 8 | – |
| 17 Dec 1971 | 7+ | 67 | G3 |
| 18 Dec 1971 | 5o | 22 | G1 |
| 19 Dec 1971 | 4- | 11 | – |
| 20 Dec 1971 | 3- | 3 | – |
Highest-Ap days of 1971
73
67
53
50
47
45
43
43
39
39
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 67: No. 460 of 34,615 days since 1932 by Ap.