Kp index — 1963
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
8.7
22 Sep · G4
Storm nights
14
G1×5G2×4G3×3G4×2
Time at storm level
20.4%
intervals at Kp ≥ 5−
Avg Kp
3.3
all intervals
Tap a day — its eight intervals open here.
Highlights
- G4 storm · Sep 21–28 · peak Kp 8.7
1963 · 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.