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Geomagnetic activity in January 1946
Mean Ap12.6No. 540 of 1138
G1+ days5
G3+ days1
Max Ap703 Jan 1946
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 3 Jan 1946 | 7o | 70 | G3 |
| 4 Jan 1946 | 6o | 52 | G2 |
| 11 Jan 1946 | 5+ | 23 | G1 |
| 23 Jan 1946 | 5o | 16 | G1 |
| 24 Jan 1946 | 5o | 30 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| January 1945 | 10.2 | 6 | 1 |
| January 1946 | 12.6 | 5 | 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.
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Mean Ap 12.6 in January 1946, No. 540 of 1138 months since 1932; 5 days reached G1 or higher.