The 1919 Ayvalık earthquake struck Balıkesir Province in the Ottoman Empire on 19 November.

The earthquake had a moment magnitude of 7.0 and depth of 10 km (6.2 mi).

[1] Many homes, minarets and public buildings in Soma, Bergama, Ayvalık, Lesbos, Edremit and Balikesir were damaged or collapsed.

An estimated 3,000 people were killed and 16,000 buildings were heavily damaged.

[3]