Kp index — May 1981
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
7.0
10 May · G3
Storm nights
9
G1×2G2×3G3×4
Time at storm level
13.7%
intervals at Kp ≥ 5−
Avg Kp
2.7
all intervals
Tap a day — its eight intervals open here.
Highlights
- G3 storm · May 9–11 · peak Kp 7.0
1981 · the year at a glance — storm nights by month · year peak Kp 8.3
All-time record: Kp 9.0 — reached on 27 days, most recently 2024-05-11.