An open access 90 m resolution V_S30 data and map for areas affected by the January 2025 M6.8 Dingri Xizang, China earthquake

In this study, we developed a high-resolution (3 arcsec, approximately 90 m) V_S30 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_S30 maps, which typically use a 30 arcsec grid. The V_S30 values were estimated using the Cokriging-based V_S30 proxy model (SCK model), which integrates V_S30 measurements as primary constraints and utilizes topographic slope as a secondary parameter. The findings indicate that the V_S30 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_S30 estimations across various spatial resolutions and demonstrates its effectiveness in producing reliable estimations in data-sparse regions.