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Geomagnetic activity in May 1989
Mean Ap16.5No. 271 of 1138
G1+ days7
G3+ days2
Max Ap6824 May 1989
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 May 1989 | 5o | 20 | G1 |
| 5 May 1989 | 7- | 44 | G3 |
| 7 May 1989 | 6o | 46 | G2 |
| 20 May 1989 | 5- | 15 | G1 |
| 23 May 1989 | 7+ | 47 | G3 |
| 24 May 1989 | 6+ | 68 | G2 |
| 25 May 1989 | 5- | 24 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| May 1988 | 12.1 | 4 | 1 |
| May 1989 | 16.5 | 7 | 2 |
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
Mean Ap 16.5 in May 1989, No. 271 of 1138 months since 1932; 7 days reached G1 or higher.