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Geomagnetic storm on 13 Jan 1999 (G3)
Max Kp7oG3
Ap40No. 11 in 1999
Consecutive G1+ days3
Ap rank1,615since 1932
Kp by 3-hour slot (UTC)
2+
2o
1+
3+
4o
5+
6-
7o
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 10 Jan 1999 | 3o | 6 | – |
| 11 Jan 1999 | 2o | 6 | – |
| 12 Jan 1999 | 2+ | 5 | – |
| 13 Jan 1999 | 7o | 40 | G3 |
| 14 Jan 1999 | 5+ | 29 | G1 |
| 15 Jan 1999 | 5- | 20 | G1 |
| 16 Jan 1999 | 3+ | 8 | – |
Highest-Ap days of 1999
91
80
53
50
47
46
46
43
43
41
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 40: No. 1,615 of 34,615 days since 1932 by Ap.