Kp index — April 1970
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
8.3
21 Apr · G4
Storm nights
8
G1×6G3×1G4×1
Time at storm level
7.5%
intervals at Kp ≥ 5−
Avg Kp
2.4
all intervals
Tap a day — its eight intervals open here.
Highlights
- G4 storm · Apr 17–22 · peak Kp 8.3
1970 · the year at a glance — storm nights by month · year peak Kp 9.0
All-time record: Kp 9.0 — reached on 27 days, most recently 2024-05-11.