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Geomagnetic activity in January 2004
Mean Ap21.6No. 115 of 1138
G1+ days15
G3+ days1
Max Ap6422 Jan 2004
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Jan 2004 | 5- | 24 | G1 |
| 3 Jan 2004 | 5- | 22 | G1 |
| 5 Jan 2004 | 5- | 25 | G1 |
| 6 Jan 2004 | 6o | 24 | G2 |
| 7 Jan 2004 | 5o | 29 | G1 |
| 9 Jan 2004 | 5o | 23 | G1 |
| 10 Jan 2004 | 5+ | 26 | G1 |
| 11 Jan 2004 | 5- | 19 | G1 |
| 16 Jan 2004 | 5- | 29 | G1 |
| 22 Jan 2004 | 7o | 64 | G3 |
| 23 Jan 2004 | 6o | 43 | G2 |
| 24 Jan 2004 | 5o | 18 | G1 |
| 25 Jan 2004 | 6- | 38 | G2 |
| 28 Jan 2004 | 6- | 23 | G2 |
| 30 Jan 2004 | 5- | 19 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| January 2003 | 12.5 | 9 | 0 |
| January 2004 | 21.6 | 15 | 1 |
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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Mean Ap 21.6 in January 2004, No. 115 of 1138 months since 1932; 15 days reached G1 or higher.