龙门山断裂带四川北段震源位置的精确修定  

Accruacy Amcndment of Foca1 Location along the Longmenshan Fault in the North of sichuan

作　　者：赵珠[1] 陈农[1] 

机构地区：[1]四川省地震局

出　　处：《四川地震》1995年第4期19-30,共12页Earthquake Research in Sichuan

摘　　要：本文采用人工地震折射测线和天然地震观测资料，给出了龙门山断裂带四川省境内北段Ｐ波和Ｓ波地壳速度模型，以此模型为基础，采用一种数值性能极好的定位方法和走时与慢度结合确定震源深度的方法，修定了沿龙门山断裂带四川北段及东侧盆地边缘的１１０个地震，给出了震源位置的精确解，讨论了震源深度的分布。本文还特定位结果与常规的四川台网地震目录进行了比较，对台网目录的精度进行了评价，并提出了提高台网定位精度的意见和建议。Using the data of refraction stirvey of artificial earthquake and natural earthquake observatiOn、,wep、it forward the crustal velocity model of p-and S-wave along the Longmenshanfault in the north of Sichuan in this paper.Based on the model,we amended ll0 earthquakesoccLirred along the Longmenshan fault in the north of Sichuan and in the east of basin edgeusing the location method with an excellent numerical property and the determining focaldepth nlethod combining travel-time with slowness;gave the accuracy solution of fOcal location; cliscussed focal depth distribution。In this paper,we compared the determining resultswith the earthqtiake catalogue of the Sichuan、network;evaluated the accuracy of network cat-alogue;aclvanced the ideas and suggestion of improving network location accuracy。

关 键 词：速度结构 地震波 震源深度 断裂带 震源位置 

分 类 号：P315.3[天文地球—地震学]