Goharan earthquakes (2013, SE Iran) in western Makran accretionary wedge: An earthquake swarm or earthquake sequence?
عنوان دوره: بیستمین کنفرانس ژئوفیزیک ایران
کد مقاله : 1828-NIGS
نویسندگان
1موسسه ژئوفیزیک/دانشجو/دانشگاه تهران/تهران/ایران
2Institute of Geophysics, University of Tehran, Tehran, Iran
3زلزله شناسی، موسسه ژئوفیزیک، دانشگاه تهران، تهران، ایران
چکیده
Makran accretionary wedge as one of the largest accretionary wedges on the world, has been formed by the convergence between Arabian and Eurasian Plates. Twelve earthquakes with magnitudes Mw ≥ 5.0 occurred in May and July 2013 in a low seismicity small area of western Makran accretionary wedge, SE Iran. The focal mechanism solutions show dominated strike-slip type. These events occurred on an ENE striking fault that allows the almost oblique convergence (N10ºE) to partition into deformation front-perpendicular motion on the subduction interface and deformation front-parallel motion on the Goharan fault. The aftershock sequence share common features with seismic swarm.
کلیدواژه ها
Title
Goharan earthquakes (2013, SE Iran) in western Makran accretionary wedge: An earthquake swarm or earthquake sequence?
Authors
saeid rahimzadeh, Noorbakhsh Mirzaei, milad kaboli
Abstract
Makran accretionary wedge as one of the largest accretionary wedges on the world, has been formed by the convergence between Arabian and Eurasian Plates. Twelve earthquakes with magnitudes Mw ≥ 5.0 occurred in May and July 2013 in a low seismicity small area of western Makran accretionary wedge, SE Iran. The focal mechanism solutions show dominated strike-slip type. These events occurred on an ENE striking fault that allows the almost oblique convergence (N10ºE) to partition into deformation front-perpendicular motion on the subduction interface and deformation front-parallel motion on the Goharan fault. The aftershock sequence share common features with seismic swarm.
Keywords
Earthquake sequence, Earthquake swarm, Strike-slip fault, Makran accretionary wedge