Kp index — May 1974
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
6.0
31 May · G2
Storm nights
14
G1×10G2×4
Time at storm level
11.7%
intervals at Kp ≥ 5−
Avg Kp
2.9
all intervals
Tap a day — its eight intervals open here.
Highlights
- G2 storm · May 30–31 · peak Kp 6.0
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.