利用2018年6月至2020年5月柯坪块体及其周边数字地震台站（38.0°—42.5°N，75.0°—80.5°E）记录的1 002个ML≥2.0天然地震的8 858条P波到时数据，基于Velest算法反演柯坪块体最小一维P波速度模型，同时获得定位结果和台站走时校正。结果表明，重新定位后3种初始模型走时均方根残差均明显减小，台站校正基本呈现出正校正，且以普昌断裂为界，普昌断裂西侧的台站校正程度均大于普昌断裂东侧；重新定位后，震中位置在空间上更加收敛，震源深度趋于正态分布，定位结果有显著改善。
Using 8858 P-wave arrival data of 1 002 natural earthquakes with ML ≥ 2.0 recorded by digital seismic stations (38.0° —42.5° N, 75.0°—80.5°E) in the Keping block and its surrounding areas from June 2018 to May 2020, the minimum one-dimensional P-wave velocity model of the Keping block was inverted based on the Velest algorithm, and the positioning results and station travel time correction were obtained simultaneously. The results showed that after relocation, the root mean square residuals of the travel time of the three initial models were significantly reduced, and the station calibration basically showed positive calibration. Moreover, with the Puchang Fault as the boundary, the calibration degree of the stations on the west side of the Puchang Fault was greater than that on the east side of the Puchang Fault; After relocation, the epicenter location became more convergent in space, and the depth of the epicenter tended to follow a normal distribution, resulting in significant improvement in the locationresults.
2024,45(4): 1-9 收稿日期：2023-7-18
DOI：10.3969/j.issn.1003-3246.2024.04.001
基金项目：新疆维吾尔自治区自然科学基金(项目编号:202122)
作者简介：南芳芳(1990—),女,本科,主要从事地震监测工作。E-mail:1429673874@qq.com
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