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Geomagnetic activity in December 2008
Mean Ap4.5No. 1114 of 1138
G1+ days0
G3+ days0
Max Ap176 Dec 2008
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| – | – | – | – |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 2007 | 6.0 | 0 | 0 |
| December 2008 | 4.5 | 0 | 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 4.5 in December 2008, No. 1114 of 1138 months since 1932; 0 days reached G1 or higher.