新丰江地震震源机制解及构造应力场  

FOCAL MECHANISMS AND TECTONIC STRESS FIELD OF THE XINFENGJIANG EARTHQUAKES

作　　者：魏柏林[1] 陈庞龙[1] 李富光[1] 黄河生[1] 

机构地区：[1]广东省地震局,中国广州510070

出　　处：《地震学报》1991年第4期462-470,共9页Acta Seismologica Sinica

摘　　要：本文根据新丰江无线遥测台网1983年10月1日—1987年4月30日165次小震中的83次8个子台都记录到的 P 波初动资料,按 P 波初动的异同,划分出37个类型,把相同类型叠加作成震源机制解且归为5个大类.根据5个大类的各应力轴及节面的特征来讨论本区的现今构造应力场.显然,与前人认识是不同的,与笔者1981年提出的结果类似,但更显示了以南北向挤压为特征的构造应力场.Altogether 83 events were recorded clearly by all the 8 sub- seismometric stations of the telemetered seismic network in the Xinfeng Jang area during the period from October 1st 1983 to April 30th 1987- Based upon the difference of the initial motion of P waves, the authors divided the 83 earthquakes into 37 pattens. Combining similar pattens, we have got 5 types of focal mechanism solutions. The recent tectonic stress field of the Xinfengjiang region is discussed. The characteristics of the stress axis and the nodal planes are different from which our predecessors got earlier; but the present result is similar to which put forward by the authors in 1981. This paper shows that the tectonic stress field is clearly characteristic by a compression in the NS direction.

关 键 词：地震 震源机制 构造应力场 新丰江 

分 类 号：P315.1[天文地球—地震学]