Abstract

This paper presents the results of analysis of the spatial distribution of repeated shocks. Data from the world earthquake catalog of USGS/NEIC from 1973 to 2014 were used. Short time intervals, no more than 10 hours after the main shock, and distances from the epicenter of the main shock, no more than 5°, were considered. The dependence of the number of repeated shocks on the distance from the epicenter was studied. Two properties of the spatial distribution of repeated shocks have been identified. The first property is that the curve describing spatial distribution has its maximum at a certain distance (approximately from 10 to 120 km) from the epicenter of the main shock. The logarithm of this distance is directly proportional to the magnitude of the main shock. The second property is that the position of the maximum does not depend on time, i.e., it is a stable spatial characteristic of the earthquake source. Based on these properties, a new way to determine the size of the rupture zone was proposed.

中文翻译：

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确定源区特征尺寸的新方法

摘要

本文介绍了重复冲击的空间分布分析结果。使用了USGS / NEIC 1973年至2014年世界地震目录中的数据。考虑短时间间隔（主震后不超过10小时）和距主震震中点的距离（不超过5°）。研究了重复冲击次数与震中距离的相关性。已经确定了重复冲击的空间分布的两个属性。第一个特性是，描述空间分布的曲线在距主震震中一定距离（约10至120 km）处具有最大值。该距离的对数与主冲击的大小成正比。第二个属性是最大值的位置不依赖于时间，即。例如，它是地震源的稳定空间特征。基于这些性质，提出了一种确定断裂区域大小的新方法。