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Geomagnetic activity in February 2004
Mean Ap13.0No. 504 of 1138
G1+ days5
G3+ days0
Max Ap3012 Feb 2004
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 6 Feb 2004 | 5- | 21 | G1 |
| 11 Feb 2004 | 6+ | 28 | G2 |
| 12 Feb 2004 | 5o | 30 | G1 |
| 15 Feb 2004 | 5- | 24 | G1 |
| 29 Feb 2004 | 5+ | 24 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 2003 | 16.9 | 6 | 0 |
| February 2004 | 13.0 | 5 | 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 13.0 in February 2004, No. 504 of 1138 months since 1932; 5 days reached G1 or higher.