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Geomagnetic activity in January 2015
Mean Ap9.4No. 807 of 1138
G1+ days4
G3+ days0
Max Ap317 Jan 2015
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 3 Jan 2015 | 5- | 12 | G1 |
| 4 Jan 2015 | 5o | 18 | G1 |
| 5 Jan 2015 | 5+ | 15 | G1 |
| 7 Jan 2015 | 6+ | 31 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| January 2014 | 5.5 | 0 | 0 |
| January 2015 | 9.4 | 4 | 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.
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About this page
Mean Ap 9.4 in January 2015, No. 807 of 1138 months since 1932; 4 days reached G1 or higher.