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Geomagnetic activity in March 1938
Mean Ap13.2No. 487 of 1138
G1+ days7
G3+ days0
Max Ap5223 Mar 1938
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Mar 1938 | 5o | 28 | G1 |
| 5 Mar 1938 | 6- | 35 | G2 |
| 6 Mar 1938 | 5o | 20 | G1 |
| 22 Mar 1938 | 6o | 46 | G2 |
| 23 Mar 1938 | 6o | 52 | G2 |
| 24 Mar 1938 | 6+ | 43 | G2 |
| 26 Mar 1938 | 6+ | 26 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| March 1937 | 11.9 | 9 | 1 |
| March 1938 | 13.2 | 7 | 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 13.2 in March 1938, No. 487 of 1138 months since 1932; 7 days reached G1 or higher.