DOI: 10.1016/j.tecto.2020.228398
论文题名: Seismology of the 2017 Hojedk earthquakes (MN 6.0–6.1), Kerman province, SE Iran
作者: Nemati M. ; Hajati F.J. ; Rashidi A. ; Hassanzadeh R.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 780 语种: 英语
中文关键词: Aftershock
; Directivity
; Hojedk and Iran
; Lakar Kuh fault
; Mechanism
英文关键词: Deformation
; Earthquakes
; Mechanisms
; Satellite imagery
; Seismic waves
; Strike-slip faults
; Aftershock
; Coseismic surface rupture
; Directivity
; High resolution satellite imagery
; Hojedk and Iran
; Right lateral strike slip fault
; Rupture directivity
; Strike-slip component
; Fault slips
; aftershock
; Coulomb criterion
; deformation mechanism
; earthquake event
; earthquake hypocenter
; earthquake magnitude
; earthquake mechanism
; earthquake rupture
; focal mechanism
; satellite imagery
; seismology
; tectonic setting
; Iran
; Kerman [Iran]
英文摘要: Three moderate earthquakes on 1 and 12 December 2017 with MN magnitudes of 6.0–6.1 (MS1, MS2 and MS3) occurred in the SE Iran. They happened in the area between Nayband and Kuh Banan fault systems, NE of the Kerman metropolice. We combined satellite imagery, seismicity, focal mechanism solutions, strong motions, and Coulomb stress to investigate the earthquakes. These events were located near the southeastern splay of the N-S Lakar Kuh right-lateral strike-slip fault. Active tectonics of the Lakar Kuh fault as well as the earthquake deformations were confirmed by satellite imagery and field photographs, respectively. Hypocenters of the three Mw ~6.0 earthquakes and their aftershocks indicated a migration of faulting from the SE towards the NW. According to high resolution satellite imagery, the third earthquake produced ~6 km of coseismic surface rupture in the alluvial fan deposits (east of Mian Kuh) with maximum deformation in the middle part. The focal mechanisms of both the mainshocks and the strongest aftershocks (MN > 4.6) determined from P wave first motions indicated ~NW-SE fault strikes for the 3 events (dipping SW for MS3), with dominant reverse slip and minor strike-slip components. General northwestward migration of mainshocks as well as strong motions recorded at accelerometers nearby showed evidence for northwestward rupture directivity in all three earthquakes. It was in accordance with the rupture geometry, hypocenter and centroid depth of MS3. The Coulomb stress investigation also revealed that the aftershocks of the 3 events partially covered the increasing areas of Coulomb stress. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170667
Appears in Collections: 气候变化与战略
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作者单位: Department of Geology, Faculty of Science and Earthquake Research Center of Shahid Bahonar University of Kerman, Iran; Department of Geology, University of Golestan, Iran; International Institute of Earthquake Engineering and Seismology, Tehran, Iran; Department of Geology, Graduate University of Advanced Technology, Kerman, Iran
Recommended Citation:
Nemati M.,Hajati F.J.,Rashidi A.,et al. Seismology of the 2017 Hojedk earthquakes (MN 6.0–6.1), Kerman province, SE Iran[J]. Tectonophysics,2020-01-01,780