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Geomagnetic activity in April 1961
Mean Ap14.0No. 432 of 1138
G1+ days7
G3+ days2
Max Ap6115 Apr 1961
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Apr 1961 | 5- | 17 | G1 |
| 3 Apr 1961 | 6o | 27 | G2 |
| 9 Apr 1961 | 6+ | 24 | G2 |
| 11 Apr 1961 | 5+ | 26 | G1 |
| 13 Apr 1961 | 5+ | 15 | G1 |
| 14 Apr 1961 | 7+ | 54 | G3 |
| 15 Apr 1961 | 8- | 61 | G4 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 1960 | 41.8 | 22 | 9 |
| April 1961 | 14.0 | 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 14.0 in April 1961, No. 432 of 1138 months since 1932; 7 days reached G1 or higher.