基于背景噪声的河南及邻区瑞利波层析成像
DOI:
CSTR:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

P315

基金项目:

中国地震局星火计划攻关项目(XH25016A)资助


Rayleigh Wave Tomography of Henan and Its Adjacent Areas Based on Ambient Noise
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    使用河南及邻区127个固定台站记录的2023年1月1日至2024年12月31日间垂直分量的连续波形数据,通过背景噪声层析成像方法,构建了河南及邻区7~22s周期的瑞利波群速度分布图像。结果表明,短周期(7s、12s)的群速度分布与地表地质构造特征密切相关,高速异常主要分布在有基岩出露的山区,低速异常主要分布在有沉积层覆盖的盆地; 由地壳浅层至中下地壳,随着深度增加研究区地壳的横向不均匀性在逐渐减弱; 华北盆地在中下地壳表现为低速异常,可能与地幔热物质上涌及对地壳结构的改造有关; 研究区多数强震(M≥6.0)发生在高速异常区和低速异常区的过渡地带。

    Abstract:

    This study analyzes continuous vertical-component waveform data recorded by 127 permanent seismic stations in Henan Province and its surrounding areas between January 2023 and December 2024. Using ambient noise tomography, Rayleigh wave group velocity distribution maps were constructed for periods of 7-22 seconds. The results indicate that short-period(7 s and 12 s) group velocity patterns exhibit strong correlations with surface geological features:high-velocity anomalies are mainly associated with bedrock-exposed mountainous regions, whereas low-velocity anomalies are primarily distributed in sedimentary basins. From the shallow crust to the middle-lower crust, lateral heterogeneity in crustal structure decreases progressively with depth. A prominent low-velocity anomaly in the middle-lower crust of the North China Basin may be related to the upwelling of mantle-derived thermal materials and their modification of crustal properties. Notably, most strong earthquakes(M≥6.0) in the study area are located within transition zones between high- and low-velocity anomalies.

    参考文献
    相似文献
    引证文献
引用本文

邢康,贾漯昭,杜喜善,吴亚锋,刘晓锋.基于背景噪声的河南及邻区瑞利波层析成像[J].中国地震,2025,41(3):504-514

复制
分享
相关视频

文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2025-03-26
  • 最后修改日期:2025-05-23
  • 录用日期:
  • 在线发布日期: 2025-12-02
  • 出版日期:
文章二维码
您是第位访问者
中国地震 ® 2026 版权所有
技术支持:北京勤云科技发展有限公司