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Geomagnetic activity in February 1981
Mean Ap14.1No. 414 of 1138
G1+ days7
G3+ days1
Max Ap486 Feb 1981
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Feb 1981 | 5- | 22 | G1 |
| 6 Feb 1981 | 7- | 48 | G3 |
| 7 Feb 1981 | 6o | 20 | G2 |
| 9 Feb 1981 | 5+ | 22 | G1 |
| 24 Feb 1981 | 5- | 20 | G1 |
| 25 Feb 1981 | 5- | 24 | G1 |
| 26 Feb 1981 | 6o | 29 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1980 | 11.0 | 4 | 1 |
| February 1981 | 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.
About this page
Mean Ap 14.1 in February 1981, No. 414 of 1138 months since 1932; 7 days reached G1 or higher.