The 1944 Gulf of Edremit–Ayvacik earthquake occurred on October 6 at 05:34:48 local time in Balıkesir Province, Turkey.

It measured 6.7 on the moment magnitude scale (Mw ) and occurred at a depth of 15 km (9 mi).

Off the north coast of the gulf is a notable east northeast–west southwest trending normal fault that dips to the south.

The total length of the surface rupture was 38 km (24 mi),[5] with the eastern half located offshore.

[4] The focal mechanism solution suggest normal faulting with a small strike-slip component.

It was strongly felt on two ships docked at a harbour in Ayvalık, a city across the bay on the southern shores.

Severe damage occurred in Kozluca and has been attributed to the local geology consisting of unconsolidated erosion sediments.

The tsunami broke wooden boat piers and deposited marine debris onto the roads of Hayrettinpasa and Vehbibey.