Kp index — August 1987
The Kp archive
GFZ definitive record · 3-hour UTC intervals · 1932 → 2026-07-31
Max Kp
6.0
25 Aug · G2
Storm nights
8
G1×4G2×4
Time at storm level
6.9%
intervals at Kp ≥ 5−
Avg Kp
2.5
all intervals
Tap a day — its eight intervals open here.
Highlights
- G2 storm · Aug 25–28 · peak Kp 6.0
1987 · the year at a glance — storm nights by month · year peak Kp 7.0
All-time record: Kp 9.0 — reached on 27 days, most recently 2024-05-11.