An open access 90 m resolution VS data and map for areas affected by the January 2025 M6.8 Dingri Xizang, China earthquake

IF 1.2 4区地球科学 Q3 Earth and Planetary Sciences

Earthquake Science Pub Date : 2025-06-25 DOI:10.1016/j.eqs.2025.01.008

Jian Zhou , Li Li

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Abstract

In this study, we developed a high-resolution (3 arcsec, approximately 90 m) V_S map and associated open-access dataset for the 140 km × 200 km region affected by the January 2025 M6.8 Dingri Xizang, China earthquake. This map provides a significantly finer resolution compared to existing V_S maps, which typically use a 30 arcsec grid. The V_S values were estimated using the Cokriging-based V_S proxy model (SCK model), which integrates V_S measurements as primary constraints and utilizes topographic slope as a secondary parameter. The findings indicate that the V_S values range from 200 to 250 m/s in the sedimentary deposit areas near the earthquake’s epicenter and from 400 to 600 m/s in the surrounding mountainous regions. This study showcases the capability of the SCK model to efficiently generate V_S estimations across various spatial resolutions and demonstrates its effectiveness in producing reliable estimations in data-sparse regions.

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2025年1月中国西藏定日里氏6.8级地震影响地区的开放获取90米分辨率VS数据和地图

在这项研究中，我们开发了受2025年1月中国西藏定日6.8级地震影响的140 km × 200 km区域的高分辨率（3 arcsec，约90 m） VS地图和相关的开放获取数据集。与现有的VS地图相比，这个地图提供了一个明显更好的分辨率，后者通常使用30弧秒的网格。使用基于cokriging的VS代理模型（SCK模型）估计VS值，该模型将VS测量作为主要约束，并利用地形坡度作为次要参数。结果表明，地震震中附近沉积区的VS值在200 ~ 250 m/s之间，周围山区的VS值在400 ~ 600 m/s之间。本研究展示了SCK模型在不同空间分辨率下有效生成VS估计的能力，并证明了其在数据稀疏区域生成可靠估计的有效性。

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来源期刊

Earthquake Science GEOCHEMISTRY & GEOPHYSICS-

CiteScore

1.10

自引率

8.30%

发文量

审稿时长

3 months

期刊介绍： Earthquake Science (EQS) aims to publish high-quality, original, peer-reviewed articles on earthquake-related research subjects. It is an English international journal sponsored by the Seismological Society of China and the Institute of Geophysics, China Earthquake Administration. The topics include, but not limited to, the following ● Seismic sources of all kinds. ● Earth structure at all scales. ● Seismotectonics. ● New methods and theoretical seismology. ● Strong ground motion. ● Seismic phenomena of all kinds. ● Seismic hazards, earthquake forecasting and prediction. ● Seismic instrumentation. ● Significant recent or past seismic events. ● Documentation of recent seismic events or important observations. ● Descriptions of field deployments, new methods, and available software tools. The types of manuscripts include the following. There is no length requirement, except for the Short Notes. 【Articles】 Original contributions that have not been published elsewhere. 【Short Notes】 Short papers of recent events or topics that warrant rapid peer reviews and publications. Limited to 4 publication pages. 【Rapid Communications】 Significant contributions that warrant rapid peer reviews and publications. 【Review Articles】Review articles are by invitation only. Please contact the editorial office and editors for possible proposals. 【Toolboxes】 Descriptions of novel numerical methods and associated computer codes. 【Data Products】 Documentation of datasets of various kinds that are interested to the community and available for open access (field data, processed data, synthetic data, or models). 【Opinions】Views on important topics and future directions in earthquake science. 【Comments and Replies】Commentaries on a recently published EQS paper is welcome. The authors of the paper commented will be invited to reply. Both the Comment and the Reply are subject to peer review.