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引言华东地区(北纬30°—37°,东径113°—121°)近震地震波的平均传播速度为V_(?)=6.17公里/秒,V_(?)=3.57公里/秒,V_φ=8.52公里/秒。但是,在该区域内,地震波的传播速度是否存在差异,对此,本文根据华东地区地震台网布局,地震震源深度分布和地震活动情况,把该地区划分为8个小区(见图1),并利用苏、鲁、皖、豫、浙、沪六省(市)波速比工作会议核定过的资料,对各小区地壳上部震波传播速度进行了计算。
Introduction The average propagation velocities of near earthquakes in East China (30 ° -37 ° North latitude and 113 ° -121 ° East longitude) are V _ (?) = 6.17 km / sec, V_ (?) = 3.57 km / sec and V_φ = 8.52 Kilometers / second. However, there are differences in the propagation speed of seismic waves in this area. According to the distribution of seismic network in East China, the depth distribution of seismic focal depths and the seismic activity in this area, the paper divides the area into 8 districts (see Figure 1) Based on the data approved by the working group of wave speed ratio of six provinces (cities) in Jiangsu, Shandong, Anhui, Henan, Zhejiang and Shanghai, the velocity of shock wave propagation in the upper crust of each plot was calculated.