New Magnitude–Area Scaling Relations for the New Zealand National Seismic Hazard Model 2022

IF 2.6 3区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Bulletin of the Seismological Society of America Pub Date : 2023-12-01 DOI:10.1785/0120230114

Mark Stirling, Michelle Fitzgerald, Bruce Shaw, Clarissa Ross

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引用次数: 1

Abstract

We develop new magnitude–area scaling relations for application in the New Zealand National Seismic Hazard Model 2022 (NZ NSHM 2022) and future applications. A total of 18 published relations are selected, comprising the following tectonic and slip types: crustal strike-slip (seven relations), reverse (two relations), normal (two relations), subduction interface (five relations), and two dip-slip relations to augment the small number of available reverse and normal relations. The scaling relations are evaluated against an instrumental earthquake database flatfile, and scores are provided for each relation. Equations of the form Mw=logA+C are then used to develop mean and bounding relations for the suite of scaling relations. The final set of relations used in NZ NSHM 2022 is adjusted to be consistent with observations of major historical New Zealand earthquakes and U.S. Geological Survey practice. We also provide a second set of Mw=logA+C relations that are absent of these adjustments and so more directly reflect the results of our scoring of the published relations.

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2022 年新西兰国家地震灾害模型的新震级-面积比例关系

我们开发了新的震级面积尺度关系，用于新西兰国家地震灾害模型2022 (NZ NSHM 2022)和未来的应用。共选择了18种已公布的构造和滑动类型:地壳走滑(7种关系)、逆滑(2种关系)、正滑(2种关系)、俯冲界面(5种关系)和2种倾滑关系，以补充少量可用的逆滑和正滑关系。根据仪器地震数据库平面文件对尺度关系进行评估，并为每个关系提供分数。然后使用Mw=logA+C形式的方程来为一组缩放关系建立平均值和边界关系。NZ NSHM 2022中使用的最后一组关系进行了调整，以与新西兰主要历史地震的观测结果和美国地质调查局的实践相一致。我们还提供了第二组没有这些调整的Mw=logA+C关系，因此更直接地反映了我们对已发表关系评分的结果。

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来源期刊

Bulletin of the Seismological Society of America 地学-地球化学与地球物理

CiteScore

5.80

自引率

13.30%

发文量

140

审稿时长

3 months

期刊介绍： The Bulletin of the Seismological Society of America, commonly referred to as BSSA, (ISSN 0037-1106) is the premier journal of advanced research in earthquake seismology and related disciplines. It first appeared in 1911 and became a bimonthly in 1963. Each issue is composed of scientific papers on the various aspects of seismology, including investigation of specific earthquakes, theoretical and observational studies of seismic waves, inverse methods for determining the structure of the Earth or the dynamics of the earthquake source, seismometry, earthquake hazard and risk estimation, seismotectonics, and earthquake engineering. Special issues focus on important earthquakes or rapidly changing topics in seismology. BSSA is published by the Seismological Society of America.