Aurora & Space WeatherHome › Geomagnetic history › 2003
Geomagnetic activity in April 2003
Mean Ap20.2No. 145 of 1138
G1+ days13
G3+ days0
Max Ap4530 Apr 2003
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Apr 2003 | 5- | 18 | G1 |
| 2 Apr 2003 | 5- | 24 | G1 |
| 4 Apr 2003 | 5o | 28 | G1 |
| 5 Apr 2003 | 5+ | 28 | G1 |
| 8 Apr 2003 | 5- | 22 | G1 |
| 9 Apr 2003 | 5- | 22 | G1 |
| 16 Apr 2003 | 5+ | 33 | G1 |
| 17 Apr 2003 | 5o | 28 | G1 |
| 21 Apr 2003 | 5- | 22 | G1 |
| 24 Apr 2003 | 5o | 27 | G1 |
| 25 Apr 2003 | 5+ | 33 | G1 |
| 29 Apr 2003 | 6o | 27 | G2 |
| 30 Apr 2003 | 6o | 45 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 2002 | 16.9 | 6 | 4 |
| April 2003 | 20.2 | 13 | 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 20.2 in April 2003, No. 145 of 1138 months since 1932; 13 days reached G1 or higher.