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Geomagnetic activity in May 1975
Mean Ap13.4No. 478 of 1138
G1+ days10
G3+ days0
Max Ap356 May 1975
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 5 May 1975 | 6- | 34 | G2 |
| 6 May 1975 | 6o | 35 | G2 |
| 7 May 1975 | 5- | 22 | G1 |
| 10 May 1975 | 5o | 19 | G1 |
| 14 May 1975 | 5- | 14 | G1 |
| 16 May 1975 | 6- | 28 | G2 |
| 19 May 1975 | 5o | 15 | G1 |
| 20 May 1975 | 5o | 23 | G1 |
| 25 May 1975 | 5- | 14 | G1 |
| 26 May 1975 | 5o | 18 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1974 | 17.8 | 14 | 0 |
| May 1975 | 13.4 | 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 13.4 in May 1975, No. 478 of 1138 months since 1932; 10 days reached G1 or higher.