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Geomagnetic activity in September 2002
Mean Ap13.0No. 508 of 1138
G1+ days7
G3+ days2
Max Ap577 Sep 2002
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 Sep 2002 | 6+ | 42 | G2 |
| 7 Sep 2002 | 7+ | 57 | G3 |
| 8 Sep 2002 | 7+ | 36 | G3 |
| 10 Sep 2002 | 5- | 24 | G1 |
| 11 Sep 2002 | 5o | 26 | G1 |
| 19 Sep 2002 | 5- | 15 | G1 |
| 30 Sep 2002 | 5o | 28 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 2001 | 12.6 | 6 | 1 |
| September 2002 | 13.0 | 7 | 2 |
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 13.0 in September 2002, No. 508 of 1138 months since 1932; 7 days reached G1 or higher.