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Geomagnetic activity in September 2014
Mean Ap9.8No. 779 of 1138
G1+ days2
G3+ days0
Max Ap3712 Sep 2014
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 12 Sep 2014 | 6+ | 37 | G2 |
| 19 Sep 2014 | 5- | 20 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 2013 | 5.3 | 0 | 0 |
| September 2014 | 9.8 | 2 | 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 9.8 in September 2014, No. 779 of 1138 months since 1932; 2 days reached G1 or higher.