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Geomagnetic storm on 18 Jul 1947 (G3)
Max Kp7-G3
Ap80No. 9 in 1947
Consecutive G1+ days4
Ap rank299since 1932
Kp by 3-hour slot (UTC)
6o
5+
5+
6o
7-
7-
6+
5o
The days around it
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 15 Jul 1947 | 3o | 8 | – |
| 16 Jul 1947 | 3+ | 5 | – |
| 17 Jul 1947 | 8o | 68 | G4 |
| 18 Jul 1947 | 7- | 80 | G3 |
| 19 Jul 1947 | 5+ | 28 | G1 |
| 20 Jul 1947 | 5+ | 30 | G1 |
| 21 Jul 1947 | 3+ | 12 | – |
Highest-Ap days of 1947
128
100
100
90
90
84
82
81
80
75
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
Max Kp 7-, Ap 80: No. 299 of 34,615 days since 1932 by Ap.