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Geomagnetic activity in August 1981
Mean Ap15.6No. 321 of 1138
G1+ days10
G3+ days0
Max Ap5623 Aug 1981
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 6 Aug 1981 | 5- | 14 | G1 |
| 10 Aug 1981 | 5- | 16 | G1 |
| 11 Aug 1981 | 5- | 15 | G1 |
| 15 Aug 1981 | 5- | 13 | G1 |
| 17 Aug 1981 | 5o | 25 | G1 |
| 18 Aug 1981 | 5- | 23 | G1 |
| 23 Aug 1981 | 6+ | 56 | G2 |
| 24 Aug 1981 | 5o | 28 | G1 |
| 27 Aug 1981 | 5+ | 25 | G1 |
| 31 Aug 1981 | 5+ | 15 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| August 1980 | 9.9 | 5 | 0 |
| August 1981 | 15.6 | 10 | 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 15.6 in August 1981, No. 321 of 1138 months since 1932; 10 days reached G1 or higher.