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Geomagnetic activity in April 1942
Mean Ap17.1No. 241 of 1138
G1+ days11
G3+ days1
Max Ap704 Apr 1942
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Apr 1942 | 5o | 26 | G1 |
| 3 Apr 1942 | 6o | 30 | G2 |
| 4 Apr 1942 | 7+ | 70 | G3 |
| 8 Apr 1942 | 5- | 26 | G1 |
| 11 Apr 1942 | 6- | 42 | G2 |
| 13 Apr 1942 | 5o | 23 | G1 |
| 14 Apr 1942 | 6+ | 28 | G2 |
| 17 Apr 1942 | 6+ | 46 | G2 |
| 18 Apr 1942 | 5+ | 33 | G1 |
| 23 Apr 1942 | 5+ | 27 | G1 |
| 28 Apr 1942 | 6o | 18 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 1941 | 15.0 | 10 | 1 |
| April 1942 | 17.1 | 11 | 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 17.1 in April 1942, No. 241 of 1138 months since 1932; 11 days reached G1 or higher.