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Geomagnetic activity in April 1989
Mean Ap22.7No. 96 of 1138
G1+ days15
G3+ days1
Max Ap7626 Apr 1989
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Apr 1989 | 6- | 42 | G2 |
| 2 Apr 1989 | 5o | 26 | G1 |
| 3 Apr 1989 | 5- | 21 | G1 |
| 4 Apr 1989 | 6o | 46 | G2 |
| 5 Apr 1989 | 6o | 42 | G2 |
| 7 Apr 1989 | 5- | 27 | G1 |
| 14 Apr 1989 | 6- | 24 | G2 |
| 15 Apr 1989 | 5+ | 27 | G1 |
| 16 Apr 1989 | 5o | 20 | G1 |
| 25 Apr 1989 | 6o | 34 | G2 |
| 26 Apr 1989 | 7- | 76 | G3 |
| 27 Apr 1989 | 6- | 49 | G2 |
| 28 Apr 1989 | 5o | 39 | G1 |
| 29 Apr 1989 | 5o | 28 | G1 |
| 30 Apr 1989 | 5- | 17 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 1988 | 16.0 | 6 | 2 |
| April 1989 | 22.7 | 15 | 1 |
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 22.7 in April 1989, No. 96 of 1138 months since 1932; 15 days reached G1 or higher.