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Geomagnetic activity in March 1981
Mean Ap18.0No. 206 of 1138
G1+ days11
G3+ days1
Max Ap815 Mar 1981
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Mar 1981 | 5o | 28 | G1 |
| 2 Mar 1981 | 5o | 25 | G1 |
| 5 Mar 1981 | 7+ | 81 | G3 |
| 7 Mar 1981 | 5- | 20 | G1 |
| 13 Mar 1981 | 5+ | 28 | G1 |
| 14 Mar 1981 | 6o | 45 | G2 |
| 15 Mar 1981 | 5- | 19 | G1 |
| 17 Mar 1981 | 5- | 18 | G1 |
| 25 Mar 1981 | 6- | 36 | G2 |
| 26 Mar 1981 | 5o | 28 | G1 |
| 31 Mar 1981 | 5+ | 26 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| March 1980 | 7.6 | 1 | 0 |
| March 1981 | 18.0 | 11 | 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 18.0 in March 1981, No. 206 of 1138 months since 1932; 11 days reached G1 or higher.