Kp index — September 1953
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
7.3
3 Sep · G3
Storm nights
15
G1×8G2×4G3×3
Time at storm level
17.5%
intervals at Kp ≥ 5−
Avg Kp
2.9
all intervals
Tap a day — its eight intervals open here.
Highlights
- G3 storm · Sep 2–6 · peak Kp 7.3
1953 · the year at a glance — storm nights by month · year peak Kp 7.7
All-time record: Kp 9.0 — reached on 27 days, most recently 2024-05-11.