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Geomagnetic activity in January 1985
Mean Ap15.9No. 308 of 1138
G1+ days10
G3+ days0
Max Ap5828 Jan 1985
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Jan 1985 | 6- | 33 | G2 |
| 2 Jan 1985 | 5- | 17 | G1 |
| 8 Jan 1985 | 5+ | 19 | G1 |
| 9 Jan 1985 | 6o | 46 | G2 |
| 10 Jan 1985 | 5o | 29 | G1 |
| 21 Jan 1985 | 5- | 12 | G1 |
| 22 Jan 1985 | 5- | 11 | G1 |
| 23 Jan 1985 | 6- | 36 | G2 |
| 28 Jan 1985 | 6o | 58 | G2 |
| 29 Jan 1985 | 6- | 24 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| January 1984 | 13.4 | 7 | 0 |
| January 1985 | 15.9 | 10 | 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 1984February 1985 →
About this page
Mean Ap 15.9 in January 1985, No. 308 of 1138 months since 1932; 10 days reached G1 or higher.