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Geomagnetic activity in January 2003
Mean Ap12.5No. 544 of 1138
G1+ days9
G3+ days0
Max Ap2825 Jan 2003
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 3 Jan 2003 | 5o | 18 | G1 |
| 4 Jan 2003 | 5- | 16 | G1 |
| 20 Jan 2003 | 5- | 19 | G1 |
| 22 Jan 2003 | 5o | 19 | G1 |
| 23 Jan 2003 | 5+ | 20 | G1 |
| 25 Jan 2003 | 6- | 28 | G2 |
| 26 Jan 2003 | 5- | 20 | G1 |
| 30 Jan 2003 | 5o | 25 | G1 |
| 31 Jan 2003 | 5- | 17 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| January 2002 | 8.1 | 2 | 0 |
| January 2003 | 12.5 | 9 | 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.
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Mean Ap 12.5 in January 2003, No. 544 of 1138 months since 1932; 9 days reached G1 or higher.