Investigations of the Aftershocks of July 4, 1968 Earthquake in Epidavros

Abstract

The spatial and tlie time distribution of the aftershocks<br />of the earthquake of July 1968 in Epidavros (Greece) has been studied.<br />It was found that the value of b in Gutenberg-Richter's relationship was<br />nearly the same for the primary as well as the secondary or second order<br />aftershocks of the sequence. The focal mechanism of the second order<br />aftershocks as observed from the sense of first motion of P-waves showed<br />some difference from that of the main shock or its primary aftershock.