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Geomagnetic activity in January 1964
Mean Ap11.8No. 595 of 1138
G1+ days6
G3+ days1
Max Ap532 Jan 1964
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Jan 1964 | 7- | 53 | G3 |
| 9 Jan 1964 | 5- | 20 | G1 |
| 10 Jan 1964 | 5- | 21 | G1 |
| 16 Jan 1964 | 5o | 27 | G1 |
| 25 Jan 1964 | 5- | 16 | G1 |
| 31 Jan 1964 | 5o | 26 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| January 1963 | 10.5 | 7 | 0 |
| January 1964 | 11.8 | 6 | 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.
← December 1963February 1964 →
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Mean Ap 11.8 in January 1964, No. 595 of 1138 months since 1932; 6 days reached G1 or higher.