地震地磁观测与研究2025，Vol.46Issue(1)：13-19,7.DOI:10.3969/j.issn.1003-3246.2025.01.002
川滇地区流动重力变化场源特征分析
Analysis of field characteristics of mobile gravity change in the Sichuan-Yunnan region
摘要
Abstract
Seismic gravity analysis refers to acquiring information on the physical properties of the Earth's internal medium by studying the changes in the time-varying gravity field.This paper selects the mobile gravity observation data of the Sichuan-Yunnan region from 2013 to 2017 and uses the Euler deconvolution method to invert and interpret the source depth and spatial distribution characteristics of the gravity change field in the study area to analyze the overall monitoring capability of the gravity observation network in the study area.Taking the Ludian MS 6.5 earthquake in 2014 as an example,the differential changes in the gravity field in the study area are calculated through inversion.It is found that the areas with good coincidence are concentrated in the NW-trending strip-shaped area south of Ludian,perpendicular to the Zhaotong Fault.The overall source depth is concentrated in the range of 20-40 km,which corresponds to the depth distribution range of the main shock and aftershocks of this Ludian earthquake sequence.The gravity changes are concentrated near the fault zone.The research results can provide a certain reference for further studying the deep seismogenic environment characteristics of the Sichuan-Yunnan region.关键词
重力异常/重力固体潮/地震预测/欧拉反褶积Key words
gravity anomaly/gravitational solid tide/earthquake prediction/Euler deconvolution引用本文复制引用
程程,陈兆辉,王青山,刘志行,曹振柯,赵子达..川滇地区流动重力变化场源特征分析[J].地震地磁观测与研究,2025,46(1):13-19,7.基金项目
中国地震局第一监测中心科技创新主任基金(项目编号:XH21030Y) （项目编号:XH21030Y）
中国地震局震情跟踪项目(项目编号:2024020203) （项目编号:2024020203）
