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The 18 August 2014 M (sub w) 6.2 Murmuri, southwest Iran, earthquake; aftershock sequence analysis

Mehdi Rezapour and Ali Asghar Mottaghi
The 18 August 2014 M (sub w) 6.2 Murmuri, southwest Iran, earthquake; aftershock sequence analysis
Bulletin of the Seismological Society of America (June 2018) 108 (4): 1905-1917

Abstract

The Murmuri earthquake with magnitude M (sub w) 6.2 occurred in 18 August 2014 in southwest Iran and was followed by many aftershocks. In this article, we analyze the approximately 3 months of aftershock sequence. The general pattern of relocated aftershocks distribution shows two connected seismic zones covering areas of approximately 35X15 and 20X7 km (super 2) . The Murmuri sequence shows a secondary aftershock sequence, which started on 15 October approximately 2 months after the mainshock, with a significant increase in activity, concerning both events and their magnitudes. The mainshock and its large aftershock on 15 October occurred by activation of two separate faults with nearly the same strikes in northwest-southeast (NW-SE) direction. The cross sections through aftershock locations show that the dominant depth range of aftershocks is from approximately 6 to approximately 16 km, and they present an aseismic zone along rupture from the surface down to 6 km depth. The sections show that the deeper aftershocks are located in the southwestern part of the causative faults for the mainshock and the aftershock on 15 October. This geometry is consistent with a unilateral rupture toward southeast in the causative faults for the mainshock and the large event on 15 October.


ISSN: 0037-1106
EISSN: 1943-3573
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 108
Serial Issue: 4
Title: The 18 August 2014 M (sub w) 6.2 Murmuri, southwest Iran, earthquake; aftershock sequence analysis
Affiliation: University of Tehran, Institute of Geoophysics, Tehran, Iran
Pages: 1905-1917
Published: 20180619
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 43
Accession Number: 2018-057702
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sketch maps
N31°00'00" - N34°00'00", E46°00'00" - E51°00'00"
Secondary Affiliation: Urmia University, IRN, Iran
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201831
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