Earthquake - triggered mass movements.

Earthquakes are considered to be a major triggering cause of mass movements in many geological materials. One of the first earthquake-triggered landslide was documented as early as 372-373 B.C. when Helice, a Greek city on the northern coast of the Peloponnese, slid into the sea after having been razed to the ground. Many other examples occurred in historical times . In this chapter worldwide examples of earthquake - triggered mass movements are described. More in detail, examples in Italy and the study methodologies in Italy are illustrated. The real causes of earthquake-triggered mass movements are not completely understood. Nevertheless, according to existing studies and taking into account the research experience in Italy, some final remarks are expressed.