Kp index — January 1938
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
8.7
25 Jan · G4
Storm nights
18
G1×10G2×3G4×5
Time at storm level
19.8%
intervals at Kp ≥ 5−
Avg Kp
3.1
all intervals
Tap a day — its eight intervals open here.
Highlights
- G4 storm · Jan 25–26 · peak Kp 8.7
1938 · the year at a glance — storm nights by month · year peak Kp 9.0
All-time record: Kp 9.0 — reached on 27 days, most recently 2024-05-11.