Tsunami characteristics and source estimation of the 2024 Yauca (Peru) earthquake

IF 4.6 2区工程技术 Q1 ENGINEERING, CIVIL

Ocean Engineering Pub Date : 2025-04-24 DOI:10.1016/j.oceaneng.2025.121325

Yuchen Wang , Cesar Jiménez , Nick Moreno , Peitao Wang

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引用次数: 0

Abstract

The 2024 Yauca earthquake occurred on June 28 as a result of the subduction of the Nazca Plate beneath the South American Plate along the Peru-Chile Trench. It generated a moderate tsunami, which was recorded by tide gauges and offshore buoys. We removed low-frequency components from the sea level elevation records and analyzed the characteristics of the tsunami waveforms. Additionally, wavelet analysis was performed to investigate the temporal variations in dominant periods. We conducted a joint inversion using tsunami data from San Juan de Marcona, Chala, and DART 32401, along with teleseismic data from 25 broadband stations. A finite-fault model of 80.0 km × 60.0 km was proposed, consisting of 8 × 6 subfaults. We changed the rupture velocity (

V_{r}

) from 1.8 to 4.2 km/s. The optimum

V_{r}

was 3.6 km/s. In this scenario, the maximum and average slip values were 0.65 and 0.27 m, respectively. The finite-fault model resulted in a seismic moment (

M_{0}

) of 4.738 × 10¹⁹ Nm and a moment magnitude (

M_{w}

) of 7.05. Our proposed model can effectively reproduce the tsunami behavior along the southern coast of Peru. It helps to understand the tsunami and earthquake hazards in this region.

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2024年秘鲁尤卡地震的海啸特征和震源估计

2024年6月28日发生的尤卡地震是纳斯卡板块沿秘鲁-智利海沟向南美板块俯冲的结果。它产生了中等程度的海啸，潮汐计和近海浮标都记录了这一点。我们从海平面高程记录中去除低频分量，分析了海啸波形的特征。此外，利用小波分析分析了优势期的时间变化。我们利用来自圣胡安德马尔科纳、查拉和DART 32401的海啸数据以及来自25个宽带站的远震数据进行了联合反演。提出了80.0 km × 60.0 km有限断层模型，由8 × 6个子断层组成。我们将破裂速度（Vr）从1.8 km/s改为4.2 km/s。最佳Vr为3.6 km/s。该情景下最大滑移量为0.65 m，平均滑移量为0.27 m。有限断层模型的地震矩（M0）为4.738 × 1019 Nm，矩震级（Mw）为7.05。我们提出的模型可以有效地再现秘鲁南部海岸的海啸行为。它有助于了解该地区的海啸和地震灾害。

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

Ocean Engineering 工程技术-工程：大洋

CiteScore

7.30

自引率

34.00%

发文量

2379

审稿时长

8.1 months

期刊介绍： Ocean Engineering provides a medium for the publication of original research and development work in the field of ocean engineering. Ocean Engineering seeks papers in the following topics.