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Geomagnetic storm on 22 Aug 1947 (G4)
Max Kp8+G4
Ap71No. 12 in 1947
Consecutive G1+ days12
Ap rank401since 1932
Kp by 3-hour slot (UTC)
3-
4o
5o
8+
6+
6o
5-
4+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 19 Aug 1947 | 6+ | 52 | G2 |
| 20 Aug 1947 | 6o | 44 | G2 |
| 21 Aug 1947 | 5+ | 41 | G1 |
| 22 Aug 1947 | 8+ | 71 | G4 |
| 23 Aug 1947 | 7o | 55 | G3 |
| 24 Aug 1947 | 4+ | 21 | – |
| 25 Aug 1947 | 5+ | 28 | 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 8+, Ap 71: No. 401 of 34,615 days since 1932 by Ap.