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Geomagnetic activity in February 1947
Mean Ap11.8No. 603 of 1138
G1+ days6
G3+ days0
Max Ap4416 Feb 1947
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 8 Feb 1947 | 5o | 27 | G1 |
| 9 Feb 1947 | 5- | 23 | G1 |
| 16 Feb 1947 | 6o | 44 | G2 |
| 17 Feb 1947 | 6+ | 39 | G2 |
| 19 Feb 1947 | 5o | 24 | G1 |
| 20 Feb 1947 | 5- | 11 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1946 | 22.2 | 9 | 2 |
| February 1947 | 11.8 | 6 | 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 11.8 in February 1947, No. 603 of 1138 months since 1932; 6 days reached G1 or higher.