Kp index — July 1999
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
7.7
30 Jul · G4
Storm nights
5
G1×4G4×1
Time at storm level
4.8%
intervals at Kp ≥ 5−
Avg Kp
1.7
all intervals
Tap a day — its eight intervals open here.
Highlights
- G4 storm · Jul 30–31 · peak Kp 7.7
1999 · the year at a glance — storm nights by month · year peak Kp 8.0
All-time record: Kp 9.0 — reached on 27 days, most recently 2024-05-11.