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Geomagnetic activity in December 2013
Mean Ap4.7No. 1109 of 1138
G1+ days1
G3+ days0
Max Ap288 Dec 2013
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 8 Dec 2013 | 6o | 28 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 2012 | 3.4 | 0 | 0 |
| December 2013 | 4.7 | 1 | 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.
About this page
Mean Ap 4.7 in December 2013, No. 1109 of 1138 months since 1932; 1 days reached G1 or higher.