Kp index — 1973
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
8.3
1 Apr · G4
Storm nights
18
G1×7G2×7G3×2G4×2
Time at storm level
32.5%
intervals at Kp ≥ 5−
Avg Kp
3.4
all intervals
Tap a day — its eight intervals open here.
Highlights
- G4 storm · Apr 1–3 · peak Kp 8.3
- 18 storm nights — most in a month since 1962
1973 · 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.