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Geomagnetic activity in August 1947
Mean Ap25.3No. 59 of 1138
G1+ days13
G3+ days4
Max Ap7122 Aug 1947
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 12 Aug 1947 | 5o | 28 | G1 |
| 13 Aug 1947 | 5+ | 26 | G1 |
| 14 Aug 1947 | 5- | 12 | G1 |
| 15 Aug 1947 | 7+ | 55 | G3 |
| 16 Aug 1947 | 7+ | 54 | G3 |
| 17 Aug 1947 | 6o | 58 | G2 |
| 18 Aug 1947 | 6+ | 60 | G2 |
| 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 |
| 25 Aug 1947 | 5+ | 28 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| August 1946 | 11.3 | 7 | 1 |
| August 1947 | 25.3 | 13 | 4 |
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
Mean Ap 25.3 in August 1947, No. 59 of 1138 months since 1932; 13 days reached G1 or higher.