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Geomagnetic activity in January 1957
Mean Ap16.7No. 262 of 1138
G1+ days9
G3+ days2
Max Ap8221 Jan 1957
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Jan 1957 | 5+ | 25 | G1 |
| 10 Jan 1957 | 5o | 31 | G1 |
| 21 Jan 1957 | 9- | 82 | G5 |
| 22 Jan 1957 | 8+ | 70 | G4 |
| 23 Jan 1957 | 5o | 26 | G1 |
| 24 Jan 1957 | 5+ | 27 | G1 |
| 25 Jan 1957 | 5o | 22 | G1 |
| 29 Jan 1957 | 5o | 24 | G1 |
| 30 Jan 1957 | 6- | 36 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| January 1956 | 17.8 | 13 | 0 |
| January 1957 | 16.7 | 9 | 2 |
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 16.7 in January 1957, No. 262 of 1138 months since 1932; 9 days reached G1 or higher.