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Geomagnetic activity in June 1938
Mean Ap8.9No. 862 of 1138
G1+ days4
G3+ days0
Max Ap318 Jun 1938
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Jun 1938 | 5o | 16 | G1 |
| 8 Jun 1938 | 5- | 31 | G1 |
| 12 Jun 1938 | 5+ | 30 | G1 |
| 13 Jun 1938 | 5o | 27 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| June 1937 | 12.0 | 5 | 0 |
| June 1938 | 8.9 | 4 | 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 8.9 in June 1938, No. 862 of 1138 months since 1932; 4 days reached G1 or higher.