Kp index — 1991
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
8.7
24 Mar · G4
Storm nights
13
G1×7G2×2G3×1G4×3
Time at storm level
14.5%
intervals at Kp ≥ 5−
Avg Kp
3.0
all intervals
Tap a day — its eight intervals open here.
Highlights
- G4 storm · Mar 24–27 · peak Kp 8.7
1991 · 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.