Aurora & Space WeatherHome › Geomagnetic history › 2005
Geomagnetic activity in January 2005
Mean Ap23.7No. 80 of 1138
G1+ days13
G3+ days5
Max Ap8418 Jan 2005
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Jan 2005 | 6- | 37 | G2 |
| 4 Jan 2005 | 5- | 26 | G1 |
| 7 Jan 2005 | 8- | 40 | G4 |
| 8 Jan 2005 | 7o | 36 | G3 |
| 12 Jan 2005 | 5+ | 32 | G1 |
| 14 Jan 2005 | 5o | 16 | G1 |
| 17 Jan 2005 | 6+ | 58 | G2 |
| 18 Jan 2005 | 8- | 84 | G4 |
| 19 Jan 2005 | 7- | 60 | G3 |
| 20 Jan 2005 | 5- | 17 | G1 |
| 21 Jan 2005 | 8o | 66 | G4 |
| 22 Jan 2005 | 6o | 33 | G2 |
| 31 Jan 2005 | 5- | 19 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| January 2004 | 21.6 | 15 | 1 |
| January 2005 | 23.7 | 13 | 5 |
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.
← December 2004February 2005 →
About this page
Mean Ap 23.7 in January 2005, No. 80 of 1138 months since 1932; 13 days reached G1 or higher.