2024年mw7门多西诺断层地震的纤维成像超剪切动力学

IF 45.8 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-09-25 DOI:10.1126/science.adx6858

James Atterholt, Jeffrey J. McGuire, Andrew J. Barbour, Connie Stewart, Morgan P. Moschetti

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引用次数: 0

摘要

断层结构和破裂物理是紧密交织在一起的，对这种耦合的观察对于理解地震行为至关重要。利用密集的地震台网可以在精细尺度上观察到破裂的传播。光纤传感允许长期部署超密集阵列，从而实现对不频繁的大地震的高分辨率测量。我们用附近的光纤阵列记录了2024年Mendocino断层矩震级（mw） 7的地震，并利用地震波束形成对其行为进行了成像。破裂以亚剪切速度向东传播；在门多西诺三联路口附近停滞不前，这是一个结构复杂的区域；然后过渡到超剪切速度。震源物理与构造之间的相关性显示了岩石圈非均质性如何影响地震破裂的一级特征。我们的研究结果还证明了光纤传感在改善关键参数的实时估计以进行预警方面的潜力。

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Fiber-imaged supershear dynamics in the 2024 Mw 7 Mendocino Fault earthquake

Fault structure and rupture physics are deeply intertwined, and observations of this coupling are critical for understanding earthquake behavior. Rupture propagation is observable at fine scales using dense seismic networks. Fiber-optic sensing allows for long-term deployments of ultradense arrays that enable high-resolution measurements of infrequent, large earthquakes. We recorded the 2024 moment magnitude (M_w) 7 Mendocino Fault earthquake with a nearby fiber-optic array and imaged its behavior with seismic beamforming. The rupture propagated to the east at subshear velocity; stagnated near the Mendocino Triple Junction, a zone of structural complexity; and subsequently transitioned to supershear velocity. The correlation between source physics and structure shows how lithospheric heterogeneity affects first-order characteristics of earthquake ruptures. Our results also demonstrate the potential for fiber-optic sensing to improve real-time estimation of key parameters for early warning.

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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