Statistical Properties of Mainshocks and Aftershocks in Regional Earthquake Catalogs

本研究是运用近年来发展起来的几种方法，利用单链聚类分析来评估8个不同区域震源目录的主震和余震活动的时空变化。这些目录来自中阿留申群岛（阿达克）、阿拉斯加东部、加利福尼亚、尼加拉瓜、俄勒冈、苏联南部、秘鲁和瓦努阿图的网络。目的是了解地震群的统计特性是如何受到会聚边缘、走滑边缘和火山地区之间明显的应力和流变差异的影响。这项研究是国家减少地震危害计划的一个组成部分。

This research is to apply several recently developed methods utilizing single-link cluster analysis to evaluate temporal and spatial changes in mainshock and aftershock activity in eight different regional catalogs of earthquake hypocenters. The catalogs are from networks in the Central Aleutians (Adak), Eastern Alaska, California, Nicaragua, Oregon, the southern Soviet Union, Peru, and Vanuatu. The goal is to see how statistical properties of earthquake clusters are influenced by the obvious stress and rheologic differences between convergent margins, strike-slip margins, and volcanic regions. This research is a component of the National Earthquake Hazard Reduction Program.