【摘要】 利用P、SH、SV波的初动及振幅比获得2001年4月至2012年8月山东及附近区域132次地震震源机制解,对该区域地震断层的错动性质及地壳应力场特征进行分析。结果表明,山东及附近区域地震断层错动的基本方向为北东向和北西向,错动方式以走向滑动为主,部分为斜向滑动。分区研究表明:聊考断裂带附近区域所受挤压作用相对较强,逆断型地震破裂较多;胶东半岛及北侧海域所受拉张作用略占优势,逆断型地震破裂较少;沂沐断裂带南部附近区域逆断型与正断型的地震破裂所占比例差别不大。更多还原

【Abstract】 The properties of earthquake fault slip and characteristics of the contemporary tectonic stress field of Shandong and nearby regions is analyzed based on 132 times focal mechanism solutions which obtained by P,SH and SV wave initial motion and amplitude from April2001 to August 2012.Results show that the earthquake fault slip extend at large in NE and NW direction,the movements of earthquake faults are mainly of strike-slip with small number of oblique-slip.The sub-regions studies have shown that,the compression is relatively strong in Liao-kao fault area and the tensile is slightly dominant in Jiaodong peninsula and its northern sea area;the thrust fault earthquake rupture significantly more than the normal fault rupture in Liao-kao fault zone;In Jiaodong peninsula and its northern side of the sea area,the thrust fault rupture is far less than the normal fault rupture;the normal fault rupture is as much as the thrust fault earthquake rupture in the southern section of Yishu fault zone and its neighbor areas.更多还原