Abstract
The spatial and tlie time distribution of the aftershocks of the earthquake of July 1968 in Epidavros (Greece) has been studied. It was found that the value of b in Gutenberg-Richter's relationship was nearly the same for the primary as well as the secondary or second order aftershocks of the sequence. The focal mechanism of the second order aftershocks as observed from the sense of first motion of P-waves showed some difference from that of the main shock or its primary aftershock.
Highlights
Study of aftershocks of an earthquake may possibly provide important clues for solving the mechanism of earthquake occurrence
The time distribution of aftershocks has been studied by many Japanese investigators
4.0 where t is the time after the main shock, n(t)dt is the number of aftershocks occurring in the time interval t and t + dt and k, c and h are constant chosen to fit the data
Summary
Study of aftershocks of an earthquake may possibly provide important clues for solving the mechanism of earthquake occurrence. There were more than 300 aftershocks recorded with their magnitudes between 2.2 and 4. 4.0 where t is the time after the main shock, n(t)dt is the number of aftershocks occurring in the time interval t and t + dt and k, c and h are constant chosen to fit the data.
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