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Geomagnetic activity in January 1977
Mean Ap10.1No. 749 of 1138
G1+ days5
G3+ days0
Max Ap3030 Jan 1977
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 11 Jan 1977 | 5o | 14 | G1 |
| 28 Jan 1977 | 5+ | 13 | G1 |
| 29 Jan 1977 | 5- | 15 | G1 |
| 30 Jan 1977 | 5- | 30 | G1 |
| 31 Jan 1977 | 5+ | 19 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| January 1976 | 13.5 | 6 | 2 |
| January 1977 | 10.1 | 5 | 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.
← December 1976February 1977 →
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Mean Ap 10.1 in January 1977, No. 749 of 1138 months since 1932; 5 days reached G1 or higher.