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Source: Everything.explained.today, Washington Edu, Wikipedia

The Kamchatka Peninsula was near the epicenter of the Severo-Kurilsk earthquake in 1952. On November 4, 1952, at 16:58, the 9.0 Mw earthquake struck Severo-Kurilsk, Kuril Islands, Sakhalin Oblast, Russian SFSR, and USSR (UTC). Many communities in Sakhalin Oblast and Kamchatka Oblast were destroyed as a result, with Severo-Kurilsk suffering the worst. It was the strongest earthquake ever recorded in Russia and the seventh most violent earthquake on record since 1900.

Tsunami
With three waves that were each around 15 feet high, the tsunami struck Severo-Kurilsk from 130 kilometers (80 miles) offshore of Kamchatka. Most residents of Severo-Kurilsk fled to the nearby hills after the earthquake, where they were able to avoid the initial wave. The majority of them, though, went back to the town and perished in the second wave. Authorities claim that 2,336 individuals died out of a total population of 6,000. The surviving were transported to Russia's interior. The settlement was afterwards relocated and reconstructed there.