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Geomagnetic storm on 17 Apr 1947 (G5)
Max Kp9-G5
Ap100No. 2 in 1947
Consecutive G1+ days4
Ap rank165since 1932
Kp by 3-hour slot (UTC)
4-
4-
2-
2-
6+
7-
9-
8+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 14 Apr 1947 | 3+ | 12 | – |
| 15 Apr 1947 | 4o | 17 | – |
| 16 Apr 1947 | 3+ | 14 | – |
| 17 Apr 1947 | 9- | 100 | G5 |
| 18 Apr 1947 | 6o | 50 | G2 |
| 19 Apr 1947 | 5- | 25 | G1 |
| 20 Apr 1947 | 5o | 30 | G1 |
Highest-Ap days of 1947
128
100
100
90
90
84
82
81
80
75
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 9-, Ap 100: No. 165 of 34,615 days since 1932 by Ap.