On Mapping of Seismic Activity in Greece

Abstract

For mapping the seismic activity tlie earthquake energyreleaseil per square degree per liundred years was determined, and tlie valuesobtained were used for drawing isoenergetical lines. Two maps constructedin this way for the periods 1710-1959 and 1841-1959 show clearly tliat theearthquake activity in the Greek area is concentrated, for the most part, alongthe large fault zone bordering the western and southern coasts of Greece.It is believed tliat this fault zone marks the trend of a marginai geosyncline,which is now in the course of development in the Eastern Mediterranean.Tlie map of earthquake efflciency in Greece sliows clearly tliat the mainpart of the earthquake energy released in the Greek area comes frolli twowell developed centres of higher seismic activity, located along the abovementionedlarge fault zone.