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岫岩M_S5.4地震前烟台形变异常特征及机理分析
Study on the characteristics and mechanism of deformation anomaly in Yantai region before Xiuyan earthquake with M_S5.4
【摘要】 运用直接调和分析和速率合成方法对岫岩地震前后烟台形变观测资料进行了处理分析。结果表明,岫岩5.4级地震前,烟台地区形变观测资料出现了短临前兆异常,此次异常很可能是岫岩发震断层活动引起了相关的蓬莱-威海断裂活动,最终导致区域应力场增强的结果。
【Abstract】 By using the methods of direct harmonic analysis and velocity synthesis,the deformation data observed at Yantai monitoring station before and after the M_S5.4 Xiuyan earthquake were analyzed.The results show that short-term deformation anomaly emerged before the event.The anomaly probably is the result of regional stress field enhancement caused by the motion of Weihai-penglai fault triggered by Xiuyan seismogenic fault.
【关键词】 岫岩地震;
形变异常;
发震断层;
烟台地区;
【Key words】 Xiuyan earthquake; Deformation anomaly; Seismogenic fault; Yantai area;
【Key words】 Xiuyan earthquake; Deformation anomaly; Seismogenic fault; Yantai area;
【基金】 中国地震局联合基金项目(106085);中国地震局2006~2020年地震重点监测防御区确定项目;2005年山东省地震局合同制项目
- 【文献出处】 地震 ,Earthquake , 编辑部邮箱 ,2006年03期
- 【分类号】P315.72
- 【被引频次】11
- 【下载频次】61