Aurora & Space WeatherHome › Geomagnetic history › 1946
Geomagnetic activity in August 1946
Mean Ap11.3No. 641 of 1138
G1+ days7
G3+ days1
Max Ap5231 Aug 1946
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 7 Aug 1946 | 5o | 23 | G1 |
| 11 Aug 1946 | 5o | 28 | G1 |
| 12 Aug 1946 | 5- | 15 | G1 |
| 14 Aug 1946 | 6+ | 48 | G2 |
| 15 Aug 1946 | 5- | 23 | G1 |
| 16 Aug 1946 | 5o | 21 | G1 |
| 31 Aug 1946 | 8- | 52 | G4 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| August 1945 | 7.2 | 2 | 0 |
| August 1946 | 11.3 | 7 | 1 |
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 11.3 in August 1946, No. 641 of 1138 months since 1932; 7 days reached G1 or higher.