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Geomagnetic activity in June 1939
Mean Ap15.1No. 354 of 1138
G1+ days7
G3+ days2
Max Ap6114 Jun 1939
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Jun 1939 | 5- | 15 | G1 |
| 2 Jun 1939 | 5- | 23 | G1 |
| 14 Jun 1939 | 7o | 61 | G3 |
| 16 Jun 1939 | 7- | 35 | G3 |
| 26 Jun 1939 | 5- | 14 | G1 |
| 27 Jun 1939 | 5- | 18 | G1 |
| 29 Jun 1939 | 5o | 23 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| June 1938 | 8.9 | 4 | 0 |
| June 1939 | 15.1 | 7 | 2 |
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 15.1 in June 1939, No. 354 of 1138 months since 1932; 7 days reached G1 or higher.