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Geomagnetic activity in August 1985
Mean Ap12.9No. 509 of 1138
G1+ days5
G3+ days0
Max Ap4113 Aug 1985
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 12 Aug 1985 | 6+ | 27 | G2 |
| 13 Aug 1985 | 6o | 41 | G2 |
| 22 Aug 1985 | 5o | 28 | G1 |
| 25 Aug 1985 | 5o | 18 | G1 |
| 31 Aug 1985 | 5o | 32 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| August 1984 | 16.0 | 11 | 1 |
| August 1985 | 12.9 | 5 | 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.
About this page
Mean Ap 12.9 in August 1985, No. 509 of 1138 months since 1932; 5 days reached G1 or higher.