Kp index — March 1977
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
5.3
9 Mar · G1
Storm nights
5
G1×5
Time at storm level
3.2%
intervals at Kp ≥ 5−
Avg Kp
2.1
all intervals
Tap a day — its eight intervals open here.
Highlights
- G1 storm · Mar 8–9 · peak Kp 5.3
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.