Aurora & Space WeatherHome › Geomagnetic history › 1998
Geomagnetic storm on 4 May 1998 (G5)
Max Kp9-G5
Ap101No. 3 in 1998
Consecutive G1+ days4
Ap rank161since 1932
Kp by 3-hour slot (UTC)
6o
9-
8+
6-
6o
4-
2+
3o
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 May 1998 | 4+ | 9 | – |
| 2 May 1998 | 7- | 63 | G3 |
| 3 May 1998 | 6o | 62 | G2 |
| 4 May 1998 | 9- | 101 | G5 |
| 5 May 1998 | 7- | 42 | G3 |
| 6 May 1998 | 2+ | 5 | – |
| 7 May 1998 | 3o | 10 | – |
Highest-Ap days of 1998
144
117
101
75
66
64
64
63
62
62
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 9-, Ap 101: No. 161 of 34,615 days since 1932 by Ap.