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The Earthquake History in a Fault Zone Tells Us Almost Nothing about m(max)

机译:断层带的地震历史几乎没有告诉我们m(max)

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摘要

In the present study, we summarize and evaluate the endeavors from recent years to estimate the maximum possible earthquake magnitude m(max) from observed data. In particular, we use basic and physically motivated assumptions to identify best cases and worst cases in terms of lowest and highest degree of uncertainty of m(max). In a general framework, we demonstrate that earthquake data and earthquake proxy data recorded in a fault zone provide almost no information about m(max) unless reliable and homogeneous data of a long time interval, including several earthquakes with magnitude close to m(max), are available. Even if detailed earthquake information from some centuries including historic and paleoearthquakes are given, only very few, namely the largest events, will contribute at all to the estimation of m(max), and this results in unacceptably high uncertainties. As a consequence, estimators of m(max) in a fault zone, which are based solely on earthquake-related information from this region, have to be dismissed.
机译:在本研究中,我们总结并评估了近年来的努力,以便根据观测数据估算最大可能的地震震级m(max)。特别是,我们使用基本的和基于物理的假设,根据m(max)的最低和最高不确定度来确定最佳情况和最坏情况。在一个总体框架内,我们证明,除非长时间间隔内可靠且均质的数据(包括几度接近m(max)的地震),否则记录在断层带中的地震数据和地震代理数据几乎不提供有关m(max)的信息。可用。即使给出了包括历史地震和古地震在内的几个世纪以来的详细地震信息,也只有极少数事件(即最大的事件)会完全影响m(max)的估计,这会导致不确定性过高。结果,仅基于该区域地震相关信息的断层带m(max)估算器就必须取消。

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