Kp index — March 1990
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
8.0
30 Mar · G4
Storm nights
15
G1×6G2×5G3×3G4×1
Time at storm level
17.3%
intervals at Kp ≥ 5−
Avg Kp
3.2
all intervals
Tap a day — its eight intervals open here.
Highlights
- G4 storm · Mar 29–30 · peak Kp 8.0
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.