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Geomagnetic activity in July 1937
Mean Ap12.2No. 567 of 1138
G1+ days9
G3+ days0
Max Ap3522 Jul 1937
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 9 Jul 1937 | 5o | 15 | G1 |
| 10 Jul 1937 | 5o | 12 | G1 |
| 14 Jul 1937 | 5+ | 31 | G1 |
| 19 Jul 1937 | 6o | 21 | G2 |
| 20 Jul 1937 | 5o | 19 | G1 |
| 22 Jul 1937 | 6- | 35 | G2 |
| 23 Jul 1937 | 5- | 22 | G1 |
| 24 Jul 1937 | 6o | 34 | G2 |
| 25 Jul 1937 | 5- | 23 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| July 1936 | 10.5 | 5 | 0 |
| July 1937 | 12.2 | 9 | 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 12.2 in July 1937, No. 567 of 1138 months since 1932; 9 days reached G1 or higher.