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Geomagnetic activity in June 1990
Mean Ap16.1No. 289 of 1138
G1+ days7
G3+ days3
Max Ap8912 Jun 1990
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 7 Jun 1990 | 5+ | 22 | G1 |
| 9 Jun 1990 | 6- | 32 | G2 |
| 10 Jun 1990 | 5- | 17 | G1 |
| 12 Jun 1990 | 8+ | 89 | G4 |
| 13 Jun 1990 | 8- | 70 | G4 |
| 14 Jun 1990 | 8- | 79 | G4 |
| 27 Jun 1990 | 5- | 12 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| June 1989 | 17.1 | 10 | 1 |
| June 1990 | 16.1 | 7 | 3 |
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 16.1 in June 1990, No. 289 of 1138 months since 1932; 7 days reached G1 or higher.