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Geomagnetic activity in August 2011
Mean Ap7.3No. 981 of 1138
G1+ days2
G3+ days1
Max Ap425 Aug 2011
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 5 Aug 2011 | 8- | 42 | G4 |
| 6 Aug 2011 | 6+ | 31 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| August 2010 | 7.8 | 3 | 1 |
| August 2011 | 7.3 | 2 | 1 |
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 7.3 in August 2011, No. 981 of 1138 months since 1932; 2 days reached G1 or higher.