Kp index — August 1990
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
7.0
23 Aug · G3
Storm nights
12
G1×8G2×2G3×2
Time at storm level
14.5%
intervals at Kp ≥ 5−
Avg Kp
2.8
all intervals
Tap a day — its eight intervals open here.
Highlights
- G3 storm · Aug 20–24 · peak Kp 7.0
1990 · 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.