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Geomagnetic activity in February 1955
Mean Ap11.6No. 613 of 1138
G1+ days4
G3+ days0
Max Ap3228 Feb 1955
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 Feb 1955 | 5- | 18 | G1 |
| 11 Feb 1955 | 5- | 15 | G1 |
| 21 Feb 1955 | 5- | 14 | G1 |
| 28 Feb 1955 | 6o | 32 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1954 | 16.4 | 8 | 0 |
| February 1955 | 11.6 | 4 | 0 |
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 11.6 in February 1955, No. 613 of 1138 months since 1932; 4 days reached G1 or higher.