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Geomagnetic activity in June 1991
Mean Ap44.3No. 2 of 1138
G1+ days17
G3+ days11
Max Ap1965 Jun 1991
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Jun 1991 | 7+ | 74 | G3 |
| 2 Jun 1991 | 7o | 60 | G3 |
| 4 Jun 1991 | 7+ | 58 | G3 |
| 5 Jun 1991 | 9- | 196 | G5 |
| 6 Jun 1991 | 7- | 49 | G3 |
| 7 Jun 1991 | 5+ | 27 | G1 |
| 8 Jun 1991 | 5+ | 26 | G1 |
| 9 Jun 1991 | 7- | 58 | G3 |
| 10 Jun 1991 | 8- | 119 | G4 |
| 11 Jun 1991 | 7+ | 88 | G3 |
| 12 Jun 1991 | 7- | 66 | G3 |
| 13 Jun 1991 | 8- | 120 | G4 |
| 17 Jun 1991 | 7+ | 67 | G3 |
| 18 Jun 1991 | 5- | 26 | G1 |
| 21 Jun 1991 | 5- | 25 | G1 |
| 23 Jun 1991 | 6o | 47 | G2 |
| 24 Jun 1991 | 5o | 31 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| June 1990 | 16.1 | 7 | 3 |
| June 1991 | 44.3 | 17 | 11 |
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 44.3 in June 1991, No. 2 of 1138 months since 1932; 17 days reached G1 or higher.