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Geomagnetic activity in February 1958
Mean Ap26.9No. 45 of 1138
G1+ days14
G3+ days1
Max Ap19911 Feb 1958
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 4 Feb 1958 | 5- | 17 | G1 |
| 5 Feb 1958 | 5- | 30 | G1 |
| 6 Feb 1958 | 5- | 30 | G1 |
| 8 Feb 1958 | 5- | 27 | G1 |
| 10 Feb 1958 | 5o | 24 | G1 |
| 11 Feb 1958 | 9o | 199 | G5 |
| 12 Feb 1958 | 6+ | 59 | G2 |
| 14 Feb 1958 | 5o | 23 | G1 |
| 17 Feb 1958 | 5- | 31 | G1 |
| 18 Feb 1958 | 5o | 32 | G1 |
| 19 Feb 1958 | 5- | 25 | G1 |
| 20 Feb 1958 | 5- | 26 | G1 |
| 21 Feb 1958 | 5o | 31 | G1 |
| 22 Feb 1958 | 5- | 25 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1957 | 16.8 | 7 | 1 |
| February 1958 | 26.9 | 14 | 1 |
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 26.9 in February 1958, No. 45 of 1138 months since 1932; 14 days reached G1 or higher.