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Geomagnetic activity in February 1957
Mean Ap16.8No. 261 of 1138
G1+ days7
G3+ days1
Max Ap6224 Feb 1957
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 Feb 1957 | 5+ | 31 | G1 |
| 5 Feb 1957 | 6o | 39 | G2 |
| 13 Feb 1957 | 6+ | 43 | G2 |
| 19 Feb 1957 | 5- | 23 | G1 |
| 21 Feb 1957 | 5+ | 35 | G1 |
| 23 Feb 1957 | 6o | 32 | G2 |
| 24 Feb 1957 | 7o | 62 | G3 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1956 | 15.4 | 7 | 1 |
| February 1957 | 16.8 | 7 | 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 16.8 in February 1957, No. 261 of 1138 months since 1932; 7 days reached G1 or higher.