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Geomagnetic storm on 12 May 2021 (G3)
Max Kp7oG3
Ap42No. 3 in 2021
Consecutive G1+ days1
Ap rank1,476since 1932
Kp by 3-hour slot (UTC)
1o
1o
4o
4+
7o
7-
2o
3o
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 9 May 2021 | 1+ | 3 | – |
| 10 May 2021 | 2o | 6 | – |
| 11 May 2021 | 2- | 2 | – |
| 12 May 2021 | 7o | 42 | G3 |
| 13 May 2021 | 2o | 6 | – |
| 14 May 2021 | 2o | 3 | – |
| 15 May 2021 | 3+ | 7 | – |
Highest-Ap days of 2021
72
46
42
28
27
25
24
23
23
22
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 7o, Ap 42: No. 1,476 of 34,615 days since 1932 by Ap.