Source mechanism and stress analysis of 23 October 2011 Van Earthquake (Mw=7.1) and aftershocks

被引：15
|
作者：
Kalafat, Dogan [1 ,2 ]
Kekovali, Kivanc [1 ,2 ]
Akkoyunlu, Feyza [1 ,2 ]
Ogutcu, Zafer [1 ,2 ]
机构：
[1] Bogazici Univ, Natl Earthquake Monitoring Ctr, Kandilli Observ, TR-34684 Istanbul, Turkey
[2] Bogazici Univ, Natl Earthquake Monitoring Ctr, Earthquake Res Inst, TR-34684 Istanbul, Turkey
来源：
JOURNAL OF SEISMOLOGY | 2014年 / 18卷 / 03期
关键词：
Lake Van; Pure compressional tectonic regime; b value; Source parameters; Stress analysis; EASTERN TURKEY; ACTIVE TECTONICS; PLATEAU; PROGRAM;
D O I：
10.1007/s10950-013-9413-0
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
On 23 October 2011 at 1341 local time, a strong earthquake (Mw = 7.1) occurred east of Lake Van (KOERI; Kandilli Observatory and Earthquake Research Institute). The focal parameters of the main shock and 29 aftershocks with M a parts per thousand yenaEuro parts per thousand 4.0 were obtained from regional broadband seismic data from KOERI network by using Regional Moment Tensor Inversion Code (Dreger 2002). It is confirmed that the main shock had thrust faulting mechanism. The stress tensor analysis was completed using the focal mechanism solutions and the software developed by (Gephart Comp Geosci 16: 953-989, 1990). The maximum principal stress (P compressional) of the main shock is aligned in a N-S (NNW/SSE) direction and the tensional axis (T dilatation) is aligned in an E-W (ENE-WSW) direction. The b value is calculated as 0.96 using the maximum likelihood method (Utsu 1999).
引用
收藏
页码：371 / 384
页数：14
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