Abstract

The method for constructing the generalized vicinity of a large earthquake as put forward and implemented in (Rodkin, 2008, 2012, 2020; Rodkin and Tikhonov, 2016) was previously used for analysis of world earthquake catalogs only. The use of this method for the analysis of regional catalogs presupposes a lower magnitude threshold for classification of large events and incorporation of regional seismicity peculiarities. We constructed the generalized vicinity from regional data for the Kuril Islands and Kamchatka. The same seismicity features have been identified as those for the generalized vicinity based on worldwide data; in particular, we identified the effect of earthquake hypocenters getting shallower in the near vicinity of a large earthquake. However, the regional data revealed the unexpected effect of a temporary clustering of large earthquakes, including those cases where they were far from each other. The volumes of higher activity involve considerable parts of the subduction zone far from each other both along the trench and over depth. We have estimated characteristic parameters of these clusters and the fraction of statistically dependent and independent large events. The mutual influence of seismicity at different depths has been discussed.

中文翻译：

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使用区域数据对大地震的邻近地区进行分析：千岛—堪察加半岛地区

摘要

（Rodkin，2008，2012，2020; Rodkin and Tikhonov，2016）提出并实施的构造大地震广义邻域的方法以前仅用于分析世界地震目录。该方法用于区域目录分析的前提是，较低的阈值阈值可用于对大事件进行分类并纳入区域地震活动特征。我们根据千岛群岛和堪察加半岛的区域数据构建了广义附近地区。根据世界范围的数据，已经确定了与广义附近地区相同的地震活动度；特别是，我们确定了地震震源在大地震附近变浅的影响。然而，区域数据显示，大地震的临时聚集会产生意想不到的影响，包括那些彼此远离的情况。较高的活动量涉及俯冲带的相当大的部分，它们沿着沟槽并在深度上彼此远离。我们已经估计了这些聚类的特征参数，以及统计相关和独立的大事件所占的比例。讨论了不同深度地震活动的相互影响。