The 1894 Istanbul earthquake occurred in the Çınarcık Basin or Gulf of Izmit in the Sea of Marmara on 10 July at 12:24pm.

[3] At least an estimated 1,349 people were killed in towns around the Gulf of Izmit such as Yalova, Sapanca and Adapazarı, and in Ottoman Constantinople (present day Istanbul).

[4] Movement on the Gulf of Izmit section of the fault, which bounds the Çınarcık Basin, is the most likely cause of the 1894 event.

The earthquake is estimated to have generated shaking with a modified Mercalli intensity of 9 at Sapanca, 8.5 at Yalova, and 8 at Adapazarı, Büyükçekmece, Gebze, Kartal, Küçükçekmece and on the Princes' Islands.

[2] Numerous civil society organisations in Belgrade, capital of the nascent Kingdom of Serbia, organized benefit events to collect aid for victims of the catastrophe.