Kp index — April 1974
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
6.3
18 Apr · G2
Storm nights
19
G1×13G2×6
Time at storm level
16.7%
intervals at Kp ≥ 5−
Avg Kp
3.1
all intervals
Tap a day — its eight intervals open here.
Highlights
- G2 storm · Apr 18–24 · peak Kp 6.3
- 19 storm nights — most in a month since 1960
1974 · 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.