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本文利用中国东部苏鲁豫皖冀浙六省所属地区的80个区域地震台的资料,选取了该区及其附近的19个3～5级地震,分别对Z向和H向测定了Lg震相的走时和振幅,及最大震相Max的振幅,共有近3000组数据。测得本区Lg波传播速度为3.54km/s。根据Z向和H向,加权与不加权等几种计算方法,在50～1100Km范围内算得的各种衰减系数之间符合得很好。中国东部地区苏鲁豫皖冀浙六省及其邻近地区,约在28°N～42°N,110°E～124°E范围内(图1),我们研究了Lg波的传播速度、衰减特征和m_(lgz)、m_(lgh)、m_(mxz)、m_(mxh)四种近震震级。
In this paper, we use the data of 80 regional seismostats of the six provinces in eastern Shandong, Shandong, Shandong, Shandong and Anhui provinces to select 19 19 earthquakes of M 3 ~ 5 in the Z direction and H direction, Travel time and amplitude, and amplitude of the largest phase Max, a total of nearly 3000 sets of data. Measured in this area Lg wave propagation speed of 3.54km / s. According to Z and H direction, weighted and non-weighted several kinds of calculation methods, calculated in the range of 50 ~ 1100Km various attenuation coefficient in good agreement. In the eastern part of China, Sulu Yu, Anhui, Hebei and Zhejiang provinces and their adjacent areas, ranging from 28 ° N to 42 ° N and 110 ° E to 124 ° E (Fig. 1), we studied the propagation velocity and attenuation characteristics of Lg waves m_ (lgz), m_ (lgh), m_ (mxz), m_ (mxh) four kinds of earthquakes magnitude.