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Geomagnetic activity in March 1975
Mean Ap20.1No. 151 of 1138
G1+ days12
G3+ days2
Max Ap8010 Mar 1975
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Mar 1975 | 5- | 21 | G1 |
| 5 Mar 1975 | 5o | 30 | G1 |
| 9 Mar 1975 | 5- | 8 | G1 |
| 10 Mar 1975 | 7o | 80 | G3 |
| 11 Mar 1975 | 7- | 53 | G3 |
| 12 Mar 1975 | 5+ | 37 | G1 |
| 13 Mar 1975 | 6o | 29 | G2 |
| 14 Mar 1975 | 6- | 29 | G2 |
| 16 Mar 1975 | 5+ | 27 | G1 |
| 18 Mar 1975 | 5- | 17 | G1 |
| 27 Mar 1975 | 6+ | 34 | G2 |
| 28 Mar 1975 | 6o | 38 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| March 1974 | 22.7 | 15 | 2 |
| March 1975 | 20.1 | 12 | 2 |
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 20.1 in March 1975, No. 151 of 1138 months since 1932; 12 days reached G1 or higher.