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Geomagnetic activity in October 2004
Mean Ap8.1No. 927 of 1138
G1+ days1
G3+ days0
Max Ap3313 Oct 2004
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 13 Oct 2004 | 5o | 33 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 2003 | 34.7 | 16 | 5 |
| October 2004 | 8.1 | 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.
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About this page
Mean Ap 8.1 in October 2004, No. 927 of 1138 months since 1932; 1 days reached G1 or higher.