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Geomagnetic activity in July 2011
Mean Ap8.2No. 919 of 1138
G1+ days1
G3+ days0
Max Ap1820 Jul 2011
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 30 Jul 2011 | 5o | 16 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| July 2010 | 5.1 | 0 | 0 |
| July 2011 | 8.2 | 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 8.2 in July 2011, No. 919 of 1138 months since 1932; 1 days reached G1 or higher.