Aurora & Space WeatherHome › Geomagnetic history › 1991
Geomagnetic storm on 4 Jun 1991 (G3)
Max Kp7+G3
Ap58No. 28 in 1991
Consecutive G1+ days10
Ap rank671since 1932
Kp by 3-hour slot (UTC)
2o
3-
2+
3o
5-
7+
7o
6+
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Jun 1991 | 7+ | 74 | G3 |
| 2 Jun 1991 | 7o | 60 | G3 |
| 3 Jun 1991 | 4+ | 16 | – |
| 4 Jun 1991 | 7+ | 58 | G3 |
| 5 Jun 1991 | 9- | 196 | G5 |
| 6 Jun 1991 | 7- | 49 | G3 |
| 7 Jun 1991 | 5+ | 27 | G1 |
Highest-Ap days of 1991
196
161
134
130
128
120
119
119
117
114
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 58: No. 671 of 34,615 days since 1932 by Ap.