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Geomagnetic activity in October 1971
Mean Ap11.9No. 591 of 1138
G1+ days8
G3+ days0
Max Ap379 Oct 1971
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Oct 1971 | 5- | 21 | G1 |
| 3 Oct 1971 | 5o | 20 | G1 |
| 6 Oct 1971 | 5o | 20 | G1 |
| 7 Oct 1971 | 5o | 16 | G1 |
| 8 Oct 1971 | 5+ | 23 | G1 |
| 9 Oct 1971 | 6o | 37 | G2 |
| 28 Oct 1971 | 5- | 17 | G1 |
| 29 Oct 1971 | 5o | 27 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1970 | 12.5 | 7 | 1 |
| October 1971 | 11.9 | 8 | 0 |
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 11.9 in October 1971, No. 591 of 1138 months since 1932; 8 days reached G1 or higher.