Hall of storms · #2 / 10
The Gannon storm
May 10–11, 2024
Peak Kp
Kp 9.0
G5 — top storm class
Peak moment
00:00 UTC
May 11, 2024
Duration
2 days
May 10–11, 2024
At the ceiling
9.0 ×2
2 intervals at Kp 9.0
What it reached
worldwide — aurora photographed on every continent, the strongest storm in two decades
Open in the archive
May 2024 — the three-hourly Kp values, day by day