摘要
选用新疆台网的地震波形资料,将2017年8月9日精河M S6.6地震及附近区域2010年1月1日~2017年12月31日MS3.0以上地震用CAP方法反演震源机制解及深度,结果表明:(1)2017年8月9日精河M S6.6地震为逆断型,矩震级M W6.2,矩心深度为20.8 km;节面Ⅰ的参数:走向70°,倾角42°,滑动角78°;节面Ⅱ的参数:走向266°,倾角49°,滑动角101°;P轴方位角349°,倾角4°,T轴方位角235°,倾角81°。反演所得结果同中国地震台网中心提供的结果较为一致。(2)初步推断精河MS6.6地震破裂面为节面Ⅱ,此区域地震以倾向滑动为主,地震破裂优势走向为NWW—SEE,本次地震可能受控于库松木楔克山前断层附近的应力场。
On basis of waveform data from digital seismic network of Xinjiang,we obtained the focal mechanism of this earthquake and its adjacent regions of above MS3.0 in the area from 2010 to 2017 with the CAP method.The results showed:①on August 9,2017 Jinghe earthquake with MS6.6 was a thrust fault,moment magnitude was 6.2,and focal depth was about 20.8 km;the strike,dip and rake angles of nodal plane Ⅰ were 70°,42°and 78°;those of nodal plane Ⅱ were 266°,49°and 101°;azimuth and dip angle were 349°and 4°for P axis,235°and 81°for T axis.The result compared with the results of China Earthquake Networks Center,and the results were consistent.②It was deduced that the rupture plane of Jinghe earthquake with MS6.6 was nodal plane Ⅱ.The earthquake in this area was mainly inclined to slip,and the dominant trend of earthquake rupture was NWW-SEE,the stress field of this earthquake could be controlled by Kusongmuxieke Mountain Front Fault nearby.
作者
金花
张志斌
赵石柱
闫新义
JIN Hua;ZHANG Zhi-bin;ZHAO Shi-zhu;YAN Xin-yi(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)
出处
《内陆地震》
2019年第3期209-217,共9页
Inland Earthquake
基金
地震科技星火计划公关项目(XH18055)
