Kp index — June 1939
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
7.0
14 Jun · G3
Storm nights
7
G1×5G3×2
Time at storm level
5.4%
intervals at Kp ≥ 5−
Avg Kp
2.6
all intervals
Tap a day — its eight intervals open here.
Highlights
- G3 storm · Jun 14 · peak Kp 7.0
1939 · the year at a glance — storm nights by month · year peak Kp 8.7
All-time record: Kp 9.0 — reached on 27 days, most recently 2024-05-11.