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Geomagnetic activity in July 1989
Mean Ap7.7No. 959 of 1138
G1+ days2
G3+ days0
Max Ap261 Jul 1989
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Jul 1989 | 6+ | 26 | G2 |
| 5 Jul 1989 | 5- | 15 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| July 1988 | 10.5 | 3 | 0 |
| July 1989 | 7.7 | 2 | 0 |
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 7.7 in July 1989, No. 959 of 1138 months since 1932; 2 days reached G1 or higher.