Seismic waves velocity in the Kermanshah region using aftershocks of the 12 Novmber 2017 Mw 7.3 Sarpol-e Zahab earthquake

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عنوان دوره: نوزدهمین کنفرانس ژئوفیزیک ایران
کد مقاله : 1465-NIGS
نویسندگان
1موسسه ژئوفیزیک/دانشجو/دانشگاه تهران/تهران/ایران
2rezapour@ut.ac.ir
3زلزله شناسی، موسسه ژئوفیزیک، تهران، ایران
4دانشگاه تهران، موسسه ژئوفیزیک
چکیده
Seismic velocities data are often used to discriminate lithology of rocks and has a key role in locating occurred events. The Vp/Vs ratio and seismic wave velocity of Pg, Pn, Sg, and Sn phases directly affect the locating of earthquake in the region. In this study, we have used arrival times data of P- and S-waves recorded by 20 permanent stations. These stations are located near the active faults in the Kermanshah region with latitudes 32-36ºN and Longitudes 44-50ºE. We used observed arrival time data from about 8000 events. The average Vp/Vs ratio of 1.7471±0.003 is obtained for the study region. Also, in this study, velocity values of 8.156±0.005, 6.086±0.003 and 3.429±0.006 km/s, are obtained for the Pn, Pg, and Sg phases, respectively.
کلیدواژه ها
 
Title
Seismic waves velocity in the Kermanshah region using aftershocks of the 12 Novmber 2017 Mw 7.3 Sarpol-e Zahab earthquake
Authors
saeid rahimzadeh, mahdi rezapour, Milad Kaboli, Yasamin Moshasha
Abstract
Seismic velocities data are often used to discriminate lithology of rocks and has a key role in locating occurred events. The Vp/Vs ratio and seismic wave velocity of Pg, Pn, Sg, and Sn phases directly affect the locating of earthquake in the region. In this study, we have used arrival times data of P- and S-waves recorded by 20 permanent stations. These stations are located near the active faults in the Kermanshah region with latitudes 32-36ºN and Longitudes 44-50ºE. We used observed arrival time data from about 8000 events. The average Vp/Vs ratio of 1.7471±0.003 is obtained for the study region. Also, in this study, velocity values of 8.156±0.005, 6.086±0.003 and 3.429±0.006 km/s, are obtained for the Pn, Pg, and Sg phases, respectively.
Keywords
Seismic velocities, Vp/Vs ratio, Sarpol-e Zahab earthquake