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Geomagnetic activity in July 2004
Mean Ap22.8No. 95 of 1138
G1+ days8
G3+ days4
Max Ap18627 Jul 2004
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 11 Jul 2004 | 5o | 18 | G1 |
| 17 Jul 2004 | 6o | 21 | G2 |
| 22 Jul 2004 | 7o | 31 | G3 |
| 23 Jul 2004 | 6o | 52 | G2 |
| 24 Jul 2004 | 6o | 37 | G2 |
| 25 Jul 2004 | 8o | 154 | G4 |
| 26 Jul 2004 | 7+ | 47 | G3 |
| 27 Jul 2004 | 9- | 186 | G5 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| July 2003 | 19.5 | 13 | 1 |
| July 2004 | 22.8 | 8 | 4 |
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 22.8 in July 2004, No. 95 of 1138 months since 1932; 8 days reached G1 or higher.