地震地磁观测与研究2026，Vol.47Issue(3)：15-21,7.DOI:10.3969/j.issn.1003-3246.2026.03.002
上海及邻区瑞雷面波相速度层析成像
Rayleigh-wave phase velocity tomography in Shanghai and adjacent regions
摘要
Abstract
Using vertical-component continuous waveform data from 58 densely deployed broadband temporary seismic stations in Shanghai and its adjacent regions,we obtained high-resolution Rayleigh-wave phase velocity maps for periods of 5-30 s based on ambient noise tomography.The results show significant lateral heterogeneity in the surface-wave phase velocity structure.At periods of 5-10 s,which mainly sample the shallow and upper crust,the velocity anomalies are broadly consistent with the regional topography and the distribution of major faults.At periods of 15-20 s,which mainly correspond to the middle and lower crust,the velocity variations are relatively small,indicating gentle crustal undulations and weak lateral heterogeneity.At periods of 25-30 s,the phase velocity anomalies may be mainly controlled by Moho undulations.Hangzhou and Shaoxing exhibit overall high velocities,suggesting relatively thin crust and a shallow Moho,whereas the Jiaxing-Huzhou and Taicang-Jiading areas show distinct low velocities,indicating a relatively deep Moho.Combined with the epicentral distribution,earthquakes in the study area are found to occur mainly in transition zones between high-and low-velocity anomalies.关键词
背景噪声成像/互相关/上海及邻区/相速度Key words
ambient noise tomography/cross-correlation/Shanghai and adjacent regions/phase velocity引用本文复制引用
王仁涛,冯策,宋秀青,夏波..上海及邻区瑞雷面波相速度层析成像[J].地震地磁观测与研究,2026,47(3):15-21,7.基金项目
中国地震局地震监测预报预警工作任务课题(项目编号:CEA-SJH-202501015,CEA-JCYJ-202601012) （项目编号:CEA-SJH-202501015,CEA-JCYJ-202601012）
