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Geomagnetic activity in July 1958
Mean Ap24.7No. 65 of 1138
G1+ days15
G3+ days3
Max Ap2008 Jul 1958
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Jul 1958 | 5o | 17 | G1 |
| 3 Jul 1958 | 5- | 15 | G1 |
| 4 Jul 1958 | 5- | 21 | G1 |
| 8 Jul 1958 | 9o | 200 | G5 |
| 9 Jul 1958 | 7o | 75 | G3 |
| 10 Jul 1958 | 5o | 17 | G1 |
| 17 Jul 1958 | 5- | 16 | G1 |
| 18 Jul 1958 | 5+ | 34 | G1 |
| 19 Jul 1958 | 5o | 25 | G1 |
| 20 Jul 1958 | 5- | 22 | G1 |
| 21 Jul 1958 | 7+ | 53 | G3 |
| 22 Jul 1958 | 5o | 20 | G1 |
| 24 Jul 1958 | 5- | 18 | G1 |
| 27 Jul 1958 | 5o | 28 | G1 |
| 31 Jul 1958 | 5+ | 15 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| July 1957 | 15.6 | 9 | 3 |
| July 1958 | 24.7 | 15 | 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 24.7 in July 1958, No. 65 of 1138 months since 1932; 15 days reached G1 or higher.