摘要
采用双差定位法对2018年5月6日称多5.3级地震及其余震序列进行重新定位,至2018年7月15日共获取129个地震的重新定位结果。结果显示,称多5.3级地震序列主要呈NWW或NNW向分布,其中长轴沿NWW向展布,长约11 km,震源深度主要分布在6-12 km范围内,优势分布为8-11 km。此次地震的震源机制解为走滑型,最佳波形拟合深度为10.1 km。结合精定位、震源机制等综合分析,认为主破裂面走向呈NNW向,发震构造应为巴颜喀拉山主峰断裂。
In this article, the relocating of the aftershock sequence of the Chengduo M_S 5.3 earthquake in Qinghai Province was implemented with the double difference relocation method. Up to July 15, 2018, totally 129 aftershocks were relocated. It shows that the Chengduo M_S 5.3 earthquake sequence are mainly distributed along NWW direction or NNW direction with length of about 11 km along the long axis orienting NWW direction. The source depth distribution of most earthquakes is among 6-12 km with the advantage depth of 8-11 km. The focal mechanism solution of this earthquake is belonging to strike-slip type with the best-fit focal depth of 10.1 km. Combined with the comprehensive analysis of the precise location and the source mechanism, the seismogenic structure of the Chengduo M_S 5.3 earthquake may be the main peak fault of Bayankala mountain.
作者
李启雷
李玉丽
刘文邦
Li Qilei;Li Yuli;Liu Wenbang(Qinghai Earthquake Agency, Xining 810001, China)
出处
《地震地磁观测与研究》
2019年第3期1-6,共6页
Seismological and Geomagnetic Observation and Research
基金
青海省地震科学基金(项目编号:2019B02)
关键词
称多5.3级地震
地震序列
双差定位
震源机制
发震构造
Chengduo MS 5.3 earthquake
earthquake sequence
double difference relocation method
focal mechanism
seismogenic structure
