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Geomagnetic activity in April 1956
Mean Ap27.4No. 37 of 1138
G1+ days11
G3+ days6
Max Ap17227 Apr 1956
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Apr 1956 | 5- | 14 | G1 |
| 3 Apr 1956 | 5+ | 20 | G1 |
| 7 Apr 1956 | 5+ | 20 | G1 |
| 17 Apr 1956 | 5o | 22 | G1 |
| 21 Apr 1956 | 7o | 59 | G3 |
| 22 Apr 1956 | 7+ | 80 | G3 |
| 26 Apr 1956 | 8- | 40 | G4 |
| 27 Apr 1956 | 9- | 172 | G5 |
| 28 Apr 1956 | 7o | 64 | G3 |
| 29 Apr 1956 | 8- | 58 | G4 |
| 30 Apr 1956 | 6+ | 51 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 1955 | 13.9 | 6 | 2 |
| April 1956 | 27.4 | 11 | 6 |
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 27.4 in April 1956, No. 37 of 1138 months since 1932; 11 days reached G1 or higher.