2019年加利福尼亚州里奇克莱斯特地震序列的固体地球潮汐调制:与Coso地热场有任何联系?

IF 1.6 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Batakrushna Senapati, Dibyashakti Panda, Bhaskar Kundu
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引用次数: 0

摘要

我们报告了2019年7月山脊地震序列早期余震的固体地球潮汐调制,该序列发生在Coso地热田的东南边缘附近。研究发现,在靠近Coso地热田的北部地区,早期余震的频率受到固体地潮的调制,它们与固体地潮传递的峰值剪应力和库仑应力具有很强的相关性。然而,在同一层序中发生在Coso地热田更南部的余震与固体地球潮汐应力的相关性较弱。我们的分析表明,北部地震序列的潮汐调制是由于其靠近南加州的Coso地热田,该地热田含有高压流体,并以其易受潮汐触发而闻名。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Solid-earth tidal modulations of 2019 Ridgecrest earthquake sequence, California: any link with Coso geothermal field?

Solid-earth tidal modulations of 2019 Ridgecrest earthquake sequence, California: any link with Coso geothermal field?

We report solid-earth tidal modulation of early aftershocks of the July 2019 Ridgecrest earthquake sequence, which occurred close to the southeastern edge of the Coso geothermal field. We found that the frequency of early aftershocks in the northern part, close to the Coso geothermal field, was modulated by the solid earth tides as they exhibit a strong correlation with the peak shear stress and Coulomb stress imparted by the solid earth tides. However, aftershocks that occurred farther south of the Coso geothermal field in the same sequence exhibit a weak correlation with the solid earth tidal stress. Our analysis implies that the tidal modulation of the earthquake sequence in the northern part is due to its vicinity to the Coso geothermal fields in southern California, which contain high-pressure fluids and are well known for their susceptibility towards tidal triggering.

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来源期刊
Journal of Seismology
Journal of Seismology 地学-地球化学与地球物理
CiteScore
3.30
自引率
6.20%
发文量
67
审稿时长
3 months
期刊介绍: Journal of Seismology is an international journal specialising in all observational and theoretical aspects related to earthquake occurrence. Research topics may cover: seismotectonics, seismicity, historical seismicity, seismic source physics, strong ground motion studies, seismic hazard or risk, engineering seismology, physics of fault systems, triggered and induced seismicity, mining seismology, volcano seismology, earthquake prediction, structural investigations ranging from local to regional and global studies with a particular focus on passive experiments.
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