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Geomagnetic activity in August 1957
Mean Ap13.6No. 460 of 1138
G1+ days9
G3+ days3
Max Ap3830 Aug 1957
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 3 Aug 1957 | 6+ | 27 | G2 |
| 4 Aug 1957 | 5+ | 12 | G1 |
| 6 Aug 1957 | 6- | 31 | G2 |
| 9 Aug 1957 | 5- | 16 | G1 |
| 13 Aug 1957 | 6- | 33 | G2 |
| 21 Aug 1957 | 5+ | 19 | G1 |
| 29 Aug 1957 | 7- | 28 | G3 |
| 30 Aug 1957 | 7- | 38 | G3 |
| 31 Aug 1957 | 7o | 36 | G3 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| August 1956 | 15.5 | 9 | 1 |
| August 1957 | 13.6 | 9 | 3 |
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 13.6 in August 1957, No. 460 of 1138 months since 1932; 9 days reached G1 or higher.