地震地磁观测与研究2025，Vol.46Issue(3)：56-63,8.DOI:10.3969/j.issn.1003-3246.2025.03.007
2024年台湾省花莲县海域MS 7.3地震前粤桂交界地区地球物理异常特征
Characteristics of precursory anomalies in the border area between Guangdong and Guangxi before the MS 7.3 earthquake in the sea area of Hualien County,Taiwan Province
摘要
Abstract
On April 3,2024,MS 7.3 earthquake in the sea area of Hualien County Taiwan Province broke the earthquake calm lasted for 17 years after the MS 7.2 earthquake in Pingtung waters of Taiwan Province in 2006.Analysis reveals that,three years prior to the occurrence of this earthquake,multiple seismic geophysical measurements in the Guangdong-Guangxi border area showed mid-term anomalies,specifically manifested as:the fluid observation data showed an upward trend,cross fault leveling measurement data showed compressive changes,ground tilt data tent to be NE,the strain data of the tunnel body showed a tensile state,and the drilling strain data showed abnormal compressibility.In addition,through analysis of earthquake source mechanism about MS 7.3 earthquake,the causal mechanism of abnormal changes in different geophysical observation methods in the Guangdong-Guangxi border region are revealed.关键词
洞体应变/倾斜/分量式钻孔应变/流体Key words
cave strain/tilt/component-type borehole strain/fluid引用本文复制引用
郭培兰,黄惠宁,莫佩婵,苏珊..2024年台湾省花莲县海域MS 7.3地震前粤桂交界地区地球物理异常特征[J].地震地磁观测与研究,2025,46(3):56-63,8.基金项目
2024年度震情跟踪定向工作任务(项目编号:2024020506) （项目编号:2024020506）
广西壮族自治区地震局科研合同制项目(项目编号:202405) （项目编号:202405）
