Tidal Modulation of Seismicity Between the Mw 6.4 and Mw 7.1 2019 Ridgecrest Earthquakes

IF 1.9 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

pure and applied geophysics Pub Date : 2025-04-03 DOI:10.1007/s00024-025-03705-2

Ruyu Yan, Xiaodong Chen, Rumeng Guo, Jiangcun Zhou, Ming Qin, Heping Sun

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引用次数: 0

Abstract

Tidal triggering of seismicity occurs preferentially when a region is subjected to being in a state of critical stress, suggesting that tidal stress may provide a useful tool for providing information about the state of stability of faults. Few studies have been conducted to explore the distinct behavior of tidal sensitivity with foreshock-mainshock-aftershock sequences. In this study, we integrated Schuster's test and b value to examine the correlation between tidally induced stresses and the 2019 Ridgecrest earthquake sequence. Schuster's results show a strong correlation between tidal stresses and foreshocks and a weak correlation with aftershocks. The spatiotemporal evolution of b value suggests that it is characterized by a low b value between the Mw 6.4 foreshock and the Mw 7.1 mainshock, and it slowly goes back to the background level after the mainshock. The low Schuster probability and b value indicate that the fault is under a high-stress state during the foreshock sequence, making it sensitive to tidal stress modulation.

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2019年里脊6.4和7.1级地震之间地震活动的潮汐调制

当一个地区处于临界应力状态时，潮汐触发地震活动优先发生，这表明潮汐应力可能为提供断层稳定状态的信息提供有用的工具。很少有研究探讨前震-主震-余震序列对潮汐敏感性的不同行为。在本研究中，我们将舒斯特检验和b值结合起来，检验潮汐诱发应力与2019年里奇克莱斯特地震序列之间的相关性。舒斯特的结果显示潮汐应力与前震之间有很强的相关性，而与余震之间的相关性较弱。b值的时空演化表明，在mw6.4前震和mw7.1主震之间具有低b值的特征，主震后b值缓慢回落到背景水平。较低的Schuster概率和b值表明断层在前震序列中处于高应力状态，对潮汐应力调制较为敏感。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

pure and applied geophysics 地学-地球化学与地球物理

CiteScore

4.20

自引率

5.00%

发文量

240

审稿时长

9.8 months

期刊介绍： pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.