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Geomagnetic activity in April 2017
Mean Ap11.7No. 610 of 1138
G1+ days6
G3+ days0
Max Ap4722 Apr 2017
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 Apr 2017 | 5- | 19 | G1 |
| 9 Apr 2017 | 5- | 15 | G1 |
| 20 Apr 2017 | 6- | 28 | G2 |
| 21 Apr 2017 | 5o | 17 | G1 |
| 22 Apr 2017 | 6- | 47 | G2 |
| 23 Apr 2017 | 5+ | 36 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 2016 | 9.0 | 7 | 0 |
| April 2017 | 11.7 | 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 11.7 in April 2017, No. 610 of 1138 months since 1932; 6 days reached G1 or higher.