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Geomagnetic activity in April 1955
Mean Ap13.9No. 445 of 1138
G1+ days6
G3+ days2
Max Ap5427 Apr 1955
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Apr 1955 | 5o | 16 | G1 |
| 5 Apr 1955 | 5- | 19 | G1 |
| 24 Apr 1955 | 5o | 19 | G1 |
| 27 Apr 1955 | 8- | 54 | G4 |
| 28 Apr 1955 | 7o | 44 | G3 |
| 29 Apr 1955 | 5o | 27 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 1954 | 13.9 | 4 | 2 |
| April 1955 | 13.9 | 6 | 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 13.9 in April 1955, No. 445 of 1138 months since 1932; 6 days reached G1 or higher.