1952 Severo-Kurilsk earthquake
A magnitude 9.0 megathrust earthquake ruptured the Kuril-Kamchatka trench on November 4, 1952. Tsunami waves up to 18 meters high struck Severo-Kurilsk on Paramushir island minutes later, leveling the town. More than 2,000 people were killed.
Severo-Kurilsk was rebuilt on higher ground away from the harbor.
The disaster pushed the Soviet Union to build and expand Pacific tsunami warning capabilities.
It marks the catastrophic ceiling of this subduction zone: shallow megathrust quakes can push tsunamis ashore, unlike the deep October 2026 event.
