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Geomagnetic activity in June 1987
Mean Ap7.1No. 997 of 1138
G1+ days1
G3+ days0
Max Ap256 Jun 1987
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 6 Jun 1987 | 5o | 25 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| June 1986 | 8.4 | 2 | 0 |
| June 1987 | 7.1 | 1 | 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 7.1 in June 1987, No. 997 of 1138 months since 1932; 1 days reached G1 or higher.