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Geomagnetic activity in April 2015
Mean Ap10.7No. 690 of 1138
G1+ days5
G3+ days0
Max Ap4216 Apr 2015
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Apr 2015 | 5- | 12 | G1 |
| 10 Apr 2015 | 5+ | 33 | G1 |
| 15 Apr 2015 | 5+ | 28 | G1 |
| 16 Apr 2015 | 6o | 42 | G2 |
| 17 Apr 2015 | 5o | 22 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 2014 | 8.0 | 2 | 0 |
| April 2015 | 10.7 | 5 | 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 10.7 in April 2015, No. 690 of 1138 months since 1932; 5 days reached G1 or higher.