甘青区域地震波走时表

THE TRAVEL-TIME TABLE OF REGIONAL SEISMIC WAVES IN GANSU,QINGHAI AREAS

摘要:

1985年作者编算了甘青区域地震波走时表,采用双层地壳模型,H₁=22.0公里,V_p1=6.10公里/秒,V_s1=3.55公里/秒,H₂=29.5公里,V_p2=6.47公里/秒,V_s2=3.81公里秒,H=51.5公里,V_pn=8.17公里/秒,V_sn=4.62公里/秒。表中除了按通常走时表给出了style="text-decoration:overline">p、s、P₂、S₂、P_n、S_n波的走时外,还给出中间层界面上的反射波P₁、S₁和莫霍界面上的反射波P_n、S_n的走时。该表使用方便,比用单层模型计算的甘肃及邻近地区地震波走时表更接近实际,比用甘肃地区的4层定位模型计算的走时精度高。

Abstract:

In 1985, we calculated the travel-time table of regional seismic waves by using a two-layer crustal model, H₁=22.0km, V_p1=6.10km/—sec, V_s1=3.55km/sec; H₂=29.5km, V_p2=6.47km/sec, V_s2=3.81km/sec; H=51.5km, V_pn= 8.17km/sec, V_sn=4.62km/sec. Besides giving the travel times ofp,s, P₂, S₂, P_n, S_n waves with the general travel-time table, it also gave the travel times of P₁, S₁ reflection waves at the surface of the middel layer and of P_m, S_m reflection waves at the Moho surface. This table is more practical than that calculated by a one-layer model of Gansu and its adjacent areas, and more accurate than that calculated by a four-layer location model of Gansu area. It is used conveniently.