论文部分内容阅读
根据常用公式 h=Δ_i/10~((I_0-I_i)/s)-1~(1/2), 式中h为震源深度,Δ_i为烈度为I_i的等震綫半径,I_0为震中烈度,S为一系数;取(1)式的对数得 logh=logΔ_i-1/2log[10~((I_0-I_i)/s)-1], 按(2)式可以作成一量版,以同时測定h和s。利用这个量版測定了19个中国地震的s和h,結合文献[4]的資料,指出中国东部的s系数比西部的偏低;且当深度加大时,s系数加大。采用文献[1,5]的資料測定了61个地震的s系数,結果表明s的数值随深度的增加而加大,占与低速层的关系并不明显。
According to the common formula h = Δ_i / 10 ~ ((I_0-I_i) / s) -1 ~ (1/2), where h is the focal depth, Δ_i is the isometric radius of intensity I_i, I_0 is the epicenter intensity, (1) logarithm logh = logΔ_i-1 / 2log [10 ~ ((I_0-I_i) / s) -1], according to (2) can be made into a volume version, at the same time Determination of h and s. S and h of 19 Chinese earthquakes were measured by using this volume. Based on the data in [4], it is pointed out that the s coefficient in eastern China is lower than that in the west; and when the depth increases, the s coefficient increases. Based on the data of [1] and [5], the s coefficients of 61 earthquakes have been measured. The results show that the value of s increases with depth, and the relationship between s and the low velocity layer is not obvious.