Kp index — December 1977
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
7.0
2 Dec · G3
Storm nights
6
G1×4G2×1G3×1
Time at storm level
6.0%
intervals at Kp ≥ 5−
Avg Kp
1.8
all intervals
Tap a day — its eight intervals open here.
Highlights
- G3 storm · Dec 2 · peak Kp 7.0
1977 · the year at a glance — storm nights by month · year peak Kp 7.3
All-time record: Kp 9.0 — reached on 27 days, most recently 2024-05-11.