Aurora & Space WeatherHome › Geomagnetic history › 2017
Geomagnetic storm on 28 Sep 2017 (G3)
Max Kp7-G3
Ap51No. 2 in 2017
Consecutive G1+ days2
Ap rank890since 1932
Kp by 3-hour slot (UTC)
5+
6+
7-
5-
4-
4o
4-
5-
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 25 Sep 2017 | 2+ | 4 | – |
| 26 Sep 2017 | 2o | 3 | – |
| 27 Sep 2017 | 6+ | 37 | G2 |
| 28 Sep 2017 | 7- | 51 | G3 |
| 29 Sep 2017 | 3+ | 11 | – |
| 30 Sep 2017 | 4o | 14 | – |
| 1 Oct 2017 | 3+ | 11 | – |
Highest-Ap days of 2017
106
51
47
47
46
44
44
37
37
36
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
Max Kp 7-, Ap 51: No. 890 of 34,615 days since 1932 by Ap.