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Geomagnetic storm on 4 Nov 2021 (G4)
Max Kp8-G4
Ap72No. 1 in 2021
Consecutive G1+ days3
Ap rank396since 1932
Kp by 3-hour slot (UTC)
6+
6-
7o
8-
6-
4-
2-
2o
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Nov 2021 | 3+ | 8 | – |
| 2 Nov 2021 | 5- | 17 | G1 |
| 3 Nov 2021 | 6+ | 19 | G2 |
| 4 Nov 2021 | 8- | 72 | G4 |
| 5 Nov 2021 | 4- | 11 | – |
| 6 Nov 2021 | 4o | 17 | – |
| 7 Nov 2021 | 4o | 5 | – |
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 8-, Ap 72: No. 396 of 34,615 days since 1932 by Ap.