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Geomagnetic activity in May 2017
Mean Ap8.1No. 928 of 1138
G1+ days2
G3+ days1
Max Ap4728 May 2017
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 27 May 2017 | 6- | 13 | G2 |
| 28 May 2017 | 7o | 47 | G3 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 2016 | 11.6 | 4 | 0 |
| May 2017 | 8.1 | 2 | 1 |
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 8.1 in May 2017, No. 928 of 1138 months since 1932; 2 days reached G1 or higher.