京西北地区近震波速、平均波速比及地壳厚度的测定  

THE SURVEY FOR WAVE VELOCITY OF NEAR EARTHQUAKES AND MEAN VP/VS RATIO IN NORTHWEST BEIJING AND THE DEPTH OF CRUST

作　　者：张从珍[1] 刘继禄[1] 陈立强[1] 

机构地区：[1]河北省地震局,石家庄050021

出　　处：《华北地震科学》2000年第2期70-75,共6页North China Earthquake Sciences

摘　　要：本文选取阳原台 DD- 2型地震仪在 1 998— 1 999年间记录清晰、可靠的 50次张北地震和记录到 Pn震相的 2 5次地震资料。通过计算 ,得到京西北地区直达波的平均传播速度为 :Vpg=5.99km/s,Vsg=3.47km/s,平均波速比 Vpg/Vsg=1 .73,京西北地区的地壳厚度为 41 Km。The data of 50 Zhangbei after shocks and the Pn seismic phase of 25 aftershocks recorded clearly and reliably by DD-2 Seimograph of Yangyuan seismostation during 1998 to 1999 period are analyzed.Through calculation we get the following results:the mean propagation velocity of direct wave in northwest Beijing area is Vps =5.99Km/s, Vsg =3.47Km/s,mean Vpg/Vsg =1.73,the crustal depth of the region is 41km.

关 键 词：地震波速比 地壳构造 震相 地壳厚度 

分 类 号：P315.3[天文地球—地震学] P315.2[天文地球—固体地球物理学]