Aurora & Space WeatherHome › Geomagnetic history › 1938
Geomagnetic activity in February 1938
Mean Ap15.9No. 306 of 1138
G1+ days7
G3+ days1
Max Ap516 Feb 1938
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 6 Feb 1938 | 7- | 51 | G3 |
| 7 Feb 1938 | 5o | 24 | G1 |
| 8 Feb 1938 | 6+ | 36 | G2 |
| 9 Feb 1938 | 6- | 32 | G2 |
| 10 Feb 1938 | 6o | 31 | G2 |
| 11 Feb 1938 | 6- | 27 | G2 |
| 14 Feb 1938 | 6- | 39 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1937 | 12.8 | 2 | 1 |
| February 1938 | 15.9 | 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 15.9 in February 1938, No. 306 of 1138 months since 1932; 7 days reached G1 or higher.