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Geomagnetic activity in October 1975
Mean Ap11.6No. 616 of 1138
G1+ days6
G3+ days1
Max Ap458 Oct 1975
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 6 Oct 1975 | 5- | 25 | G1 |
| 7 Oct 1975 | 5+ | 38 | G1 |
| 8 Oct 1975 | 7- | 45 | G3 |
| 9 Oct 1975 | 5+ | 37 | G1 |
| 10 Oct 1975 | 5o | 24 | G1 |
| 31 Oct 1975 | 5+ | 19 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1974 | 25.5 | 17 | 2 |
| October 1975 | 11.6 | 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.
← September 1975November 1975 →
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Mean Ap 11.6 in October 1975, No. 616 of 1138 months since 1932; 6 days reached G1 or higher.