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Geomagnetic activity in April 1941
Mean Ap15.0No. 357 of 1138
G1+ days10
G3+ days1
Max Ap6324 Apr 1941
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 9 Apr 1941 | 5- | 18 | G1 |
| 10 Apr 1941 | 5o | 27 | G1 |
| 11 Apr 1941 | 5o | 23 | G1 |
| 12 Apr 1941 | 5o | 19 | G1 |
| 18 Apr 1941 | 5o | 17 | G1 |
| 19 Apr 1941 | 6+ | 39 | G2 |
| 24 Apr 1941 | 7- | 63 | G3 |
| 25 Apr 1941 | 6o | 42 | G2 |
| 26 Apr 1941 | 5+ | 18 | G1 |
| 29 Apr 1941 | 5+ | 14 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 1940 | 17.6 | 6 | 5 |
| April 1941 | 15.0 | 10 | 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 15.0 in April 1941, No. 357 of 1138 months since 1932; 10 days reached G1 or higher.