Slip Modeling of Large Earthquakes by Joint Inversion of W-Phase and Back-Projected Images

IF 3.9 2区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS

Journal of Geophysical Research: Solid Earth Pub Date : 2025-01-04 DOI:10.1029/2024jb029270

Yuyang Peng, Dun Wang, Nozomu Takeuchi, Luis Rivera

引用次数: 0

Abstract

We present a novel finite fault inversion algorithm that combines W-phase finite fault inversion with Image Deconvolution Back-Projection (IDBP) for the determination of coseismic slip models following large earthquakes. This integrated algorithm leverages the strengths of both methods, enabling rapid determination of moment tensor, slip distribution, and centroid location. The application of this integrated algorithm to the analysis of the 2015/04/25 Mw 7.8 Nepal and the 2013/01/05 Mw 7.5 Craig Alaska earthquakes yielded results closely aligned with detailed post-earthquake studies, highlighting the algorithm's accuracy and reliability. By overcoming inherent limitations of individual methods, it provides a comprehensive understanding of the earthquake source process. The algorithm's potential for automated implementation, requiring few parameters, enhances its suitability for near real-time earthquake analysis.

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基于w相和反投影图像联合反演的大地震滑动模拟

我们提出了一种新的有限断层反演算法，该算法将w相有限断层反演与图像反卷积反投影（IDBP）相结合，用于确定大地震后的同震滑动模型。该集成算法利用了两种方法的优势，能够快速确定力矩张量、滑移分布和质心位置。将该综合算法应用于2015年4月25日尼泊尔7.8 Mw地震和2013年1月05日阿拉斯加克雷格7.5 Mw地震的分析，结果与详细的震后研究结果密切相关，突出了算法的准确性和可靠性。通过克服个别方法固有的局限性，它提供了对震源过程的全面了解。该算法具有自动化实现的潜力，需要很少的参数，增强了它对近实时地震分析的适用性。

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

Journal of Geophysical Research: Solid Earth Earth and Planetary Sciences-Geophysics

CiteScore

7.50

自引率

15.40%

发文量

559

期刊介绍： The Journal of Geophysical Research: Solid Earth serves as the premier publication for the breadth of solid Earth geophysics including (in alphabetical order): electromagnetic methods; exploration geophysics; geodesy and gravity; geodynamics, rheology, and plate kinematics; geomagnetism and paleomagnetism; hydrogeophysics; Instruments, techniques, and models; solid Earth interactions with the cryosphere, atmosphere, oceans, and climate; marine geology and geophysics; natural and anthropogenic hazards; near surface geophysics; petrology, geochemistry, and mineralogy; planet Earth physics and chemistry; rock mechanics and deformation; seismology; tectonophysics; and volcanology. JGR: Solid Earth has long distinguished itself as the venue for publication of Research Articles backed solidly by data and as well as presenting theoretical and numerical developments with broad applications. Research Articles published in JGR: Solid Earth have had long-term impacts in their fields. JGR: Solid Earth provides a venue for special issues and special themes based on conferences, workshops, and community initiatives. JGR: Solid Earth also publishes Commentaries on research and emerging trends in the field; these are commissioned by the editors, and suggestion are welcome.