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Study of the Montenegro earthquake sequence (March-July 1979)

ISTITUTO NAZIONALE DI GEOFISICA OSSERVATORIO GEOFISICO CENTRALE, MONTE PORZIO CATONE, ROME, Italy

Abstract

Data from more than 80 European seismic stations, concerning foreshocks, the main shock, and aftershocks of the earthquake which occurred near the coast of Montenegro on 15 April 1979, have been collected and analyzed. The data have allowed the focal mechanism of the two strongest shocks to be estimated. The hypocentral coordinates of more than 180 aftershocks and some foreshocks have been also computed, giving the time-space distribution of the sequence. The shocks are mostly contained in an area about 100 km long and 30 km wide, almost corresponding to the Adriatic coast line of the Yugoslavia-Albania border region. The hypocentral depths, although determined approximately, appear to be in the order of 15 to 20 km. The results have been compared with previous knowledge of the tectonics of the zone.