There was further damage and casualties in the Sea of Marmara area which had been affected by another major earthquake in May 1766.

The Sea of Marmara represents a pull-apart basin in a zone of complex strike-slip tectonic interactions associated with the North Anatolian Fault.

These basins are bounded by short strike-slip and normal faults suggesting significant extensional tectonics in the area.

Continuing west, the fault runs underwater in the North Aegean Sea through the Gulf of Saros for at least 40 km (25 mi).

Its eastern length lies under the Sea of Marmara, trending east–west, into the central basin where it terminates at a restraining bend.

Geologic trenching along the North Anatolian Fault where it plunges into the Gulf of Saros indicate evidence of rupture associated with this event.

The observed maximum Modified Mercalli intensity (MMI) was X (Extreme) at Hoşköy (Hora).

MMI IX (Violent) was observed at Gülcük, Gelibolu, Gaziköy, Mürefte, Sarkoy, Tekirdag and Evrese.

[7] The earthquake's felt area extended as far as Athos, Thessaloniki, Aydın and İzmir.