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Geomagnetic activity in May 2004
Mean Ap8.4No. 899 of 1138
G1+ days1
G3+ days0
Max Ap167 May 2004
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 12 May 2004 | 5- | 12 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 2003 | 26.1 | 17 | 4 |
| May 2004 | 8.4 | 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 8.4 in May 2004, No. 899 of 1138 months since 1932; 1 days reached G1 or higher.