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Geomagnetic activity in May 1937
Mean Ap12.8No. 514 of 1138
G1+ days7
G3+ days1
Max Ap655 May 1937
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 May 1937 | 5- | 18 | G1 |
| 4 May 1937 | 5- | 17 | G1 |
| 5 May 1937 | 7o | 65 | G3 |
| 26 May 1937 | 5- | 16 | G1 |
| 27 May 1937 | 5+ | 24 | G1 |
| 28 May 1937 | 6- | 50 | G2 |
| 29 May 1937 | 5+ | 26 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1936 | 10.2 | 6 | 0 |
| May 1937 | 12.8 | 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 12.8 in May 1937, No. 514 of 1138 months since 1932; 7 days reached G1 or higher.