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Geomagnetic activity in October 1981
Mean Ap23.5No. 84 of 1138
G1+ days15
G3+ days3
Max Ap7314 Oct 1981
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Oct 1981 | 6+ | 22 | G2 |
| 3 Oct 1981 | 6- | 36 | G2 |
| 7 Oct 1981 | 6+ | 32 | G2 |
| 8 Oct 1981 | 5o | 25 | G1 |
| 9 Oct 1981 | 5- | 21 | G1 |
| 10 Oct 1981 | 5o | 27 | G1 |
| 11 Oct 1981 | 6- | 46 | G2 |
| 13 Oct 1981 | 6- | 17 | G2 |
| 14 Oct 1981 | 8o | 73 | G4 |
| 20 Oct 1981 | 7o | 67 | G3 |
| 21 Oct 1981 | 6- | 33 | G2 |
| 22 Oct 1981 | 7o | 72 | G3 |
| 23 Oct 1981 | 6- | 27 | G2 |
| 24 Oct 1981 | 5o | 18 | G1 |
| 25 Oct 1981 | 5- | 18 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1980 | 14.0 | 7 | 0 |
| October 1981 | 23.5 | 15 | 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.
← September 1981November 1981 →
About this page
Mean Ap 23.5 in October 1981, No. 84 of 1138 months since 1932; 15 days reached G1 or higher.