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Geomagnetic activity in February 2005
Mean Ap11.3No. 644 of 1138
G1+ days4
G3+ days0
Max Ap328 Feb 2005
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 7 Feb 2005 | 6- | 30 | G2 |
| 8 Feb 2005 | 5+ | 32 | G1 |
| 9 Feb 2005 | 5- | 25 | G1 |
| 18 Feb 2005 | 6+ | 32 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 2004 | 13.0 | 5 | 0 |
| February 2005 | 11.3 | 4 | 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 11.3 in February 2005, No. 644 of 1138 months since 1932; 4 days reached G1 or higher.