Kp index — June 1991
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
8.7
5 Jun · G4
Storm nights
17
G1×5G2×1G3×8G4×3
Time at storm level
31.7%
intervals at Kp ≥ 5−
Avg Kp
4.0
all intervals
Tap a day — its eight intervals open here.
Highlights
- G4 storm · Jun 4–13 · 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.