Kp index — May 1989
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
7.3
23 May · G3
Storm nights
7
G1×3G2×2G3×2
Time at storm level
9.7%
intervals at Kp ≥ 5−
Avg Kp
2.6
all intervals
Tap a day — its eight intervals open here.
Highlights
- G3 storm · May 23–25 · peak Kp 7.3
1989 · the year at a glance — storm nights by month · year peak Kp 9.0
All-time record: Kp 9.0 — reached on 27 days, most recently 2024-05-11.