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Geomagnetic activity in May 1942
Mean Ap7.8No. 955 of 1138
G1+ days5
G3+ days0
Max Ap185 May 1942
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 May 1942 | 5- | 14 | G1 |
| 5 May 1942 | 6- | 18 | G2 |
| 14 May 1942 | 5o | 18 | G1 |
| 27 May 1942 | 5- | 16 | G1 |
| 28 May 1942 | 5o | 17 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1941 | 10.8 | 4 | 0 |
| May 1942 | 7.8 | 5 | 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 7.8 in May 1942, No. 955 of 1138 months since 1932; 5 days reached G1 or higher.