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Geomagnetic activity in January 1942
Mean Ap9.1No. 836 of 1138
G1+ days3
G3+ days0
Max Ap244 Jan 1942
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 Jan 1942 | 5o | 24 | G1 |
| 17 Jan 1942 | 5- | 18 | G1 |
| 19 Jan 1942 | 5+ | 16 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| January 1941 | 14.1 | 6 | 0 |
| January 1942 | 9.1 | 3 | 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.
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Mean Ap 9.1 in January 1942, No. 836 of 1138 months since 1932; 3 days reached G1 or higher.