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1 前言 为了定量评估地震危害性,需要估算由给定震级地震产生的在一定距离上的地面震动,而为了得到这些估算值,需要建立一些半经验的公式,这些公式给出地面运动的某种量度,作为震级和距离的函数。
1 INTRODUCTION In order to quantitatively assess the hazard of earthquakes, it is necessary to estimate ground vibrations over a distance generated by a given magnitude earthquake. To obtain these estimates, we need to establish some semi-empirical formulas that give some measure of ground motion Measure as a function of magnitude and distance.