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Geomagnetic activity in April 2007
Mean Ap9.1No. 833 of 1138
G1+ days6
G3+ days0
Max Ap291 Apr 2007
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Apr 2007 | 5o | 29 | G1 |
| 2 Apr 2007 | 5o | 22 | G1 |
| 23 Apr 2007 | 5o | 16 | G1 |
| 27 Apr 2007 | 5o | 16 | G1 |
| 28 Apr 2007 | 5- | 28 | G1 |
| 29 Apr 2007 | 5- | 21 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 2006 | 10.9 | 5 | 1 |
| April 2007 | 9.1 | 6 | 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 9.1 in April 2007, No. 833 of 1138 months since 1932; 6 days reached G1 or higher.