Aurora & Space WeatherHome › Geomagnetic history › 1985
Geomagnetic activity in October 1985
Mean Ap14.1No. 427 of 1138
G1+ days7
G3+ days1
Max Ap665 Oct 1985
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 5 Oct 1985 | 7o | 66 | G3 |
| 6 Oct 1985 | 6- | 41 | G2 |
| 7 Oct 1985 | 5o | 27 | G1 |
| 12 Oct 1985 | 5- | 12 | G1 |
| 13 Oct 1985 | 5- | 20 | G1 |
| 15 Oct 1985 | 5+ | 18 | G1 |
| 21 Oct 1985 | 5o | 16 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1984 | 23.5 | 18 | 3 |
| October 1985 | 14.1 | 7 | 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 1985November 1985 →
About this page
Mean Ap 14.1 in October 1985, No. 427 of 1138 months since 1932; 7 days reached G1 or higher.