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Vol. 60, n.3, September 2019
pp. 443-456

A statistical study of the MW 5.3 Valandovo (northern Macedonia) earthquake seismic sequence

P. Raykova, D. Solakov and S. Simeonova

Received: 10 December 2018; accepted: 21 March 2019

Abstract

Studying of the space-time distribution of earthquakes is very important for understanding the physics of the earthquake generation process. The 2009 Valandovo earthquake, northern Macedonia, with moment magnitude MW 5.3, was preceded by a foreshock sequence and followed by an intensive aftershock activity. We analyse the space-temporal pattern of earthquake distribution in the foreshock and aftershock sequences of the main event. We find short-distance clustering in both the pre-shock and aftershock period. The temporal distribution of foreshocks shows non-random features. Although dominated by the classic power law decay in time, the aftershocks suggest the existence of secondary aftershock sequence.



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