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Geomagnetic activity in October 1957
Mean Ap13.8No. 451 of 1138
G1+ days6
G3+ days1
Max Ap5014 Oct 1957
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 3 Oct 1957 | 5- | 19 | G1 |
| 13 Oct 1957 | 5+ | 26 | G1 |
| 14 Oct 1957 | 6+ | 50 | G2 |
| 21 Oct 1957 | 7- | 28 | G3 |
| 23 Oct 1957 | 5o | 20 | G1 |
| 30 Oct 1957 | 5- | 16 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1956 | 13.5 | 7 | 1 |
| October 1957 | 13.8 | 6 | 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.
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Mean Ap 13.8 in October 1957, No. 451 of 1138 months since 1932; 6 days reached G1 or higher.