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前言地震P波在地震学方面被广泛的用来研究和讨论问题。因此掌握P波最大振幅和相应周期之比随震中距的变化关系是非常有益的,在我国地震资料的分析处理中,人们早就发现P波的影区存在,但影区的范围多大说法不一,其中绝大多数人是引用Gutenberg,Richter等人的国外某一地区或世界范围的平均结果,本文是依据我国的观测资料对我国P波的影区及随震中距的变化情况进行讨论,同时给出我国P波变化曲线的结果。
Preface Seismic P waves are widely used in seismology to study and discuss problems. Therefore, it is very beneficial to master the relationship between the maximum amplitude of P wave and the corresponding period with the variation of epicenter distance. In the analysis and processing of seismic data in China, people have long found that there is a shadow of P wave. However, First, the vast majority of them refer to the average result of a certain area or world abroad cited by Gutenberg, Richter and others. Based on the observation data of our country, the paper discusses the shadow of P-wave in our country and the change of the distance with the epicenter, At the same time, the result of P wave in our country is given.