The fault of Antissa is located a few kilometers South-West of the settlement of the same name, and cuts the volcanic rocks of Skamioudas hill. The fault is recognized by the large morphological step, created by the action of the fault through successive seismic events.
Faults are structures that are created when the stresses that develop in the Earth’s crust exceed the strength limit of the rocks, causing them to break.
On the mirror surface of the fault, impressive slip lines appear, which are witnesses to the movement of the fault. These lines, which appear as scratches on the rocks, are the marks left by the opposite movement of the two parts.
The Antissa fault is part of the deformation structures of Lesvos related to the great dextral fault of Anatolia and the intense seismic activity of the North Aegean.