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1817 Earthquake and Tsunami

When
23 August 1817
Where
Site of ancient Helike
Part of
1817 earthquake near Helike, Greece

An earthquake followed by a tsunami struck the site of Helike on 23 August 1817, causing 65 deaths.

The disaster occurred at the same spot as the ancient submersion of Helike. It was located in the regional unit of Achaea, northern Peloponnesos, near the Corinthian Gulf. The event is described as a similar disaster to the 373 BC catastrophe, resulting in significant loss of life.

Sources

  1. 1817 Wikipedia, revision of 2026-06-20
  2. Helike Wikipedia, revision of 2026-07-18

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.