大地测量与地球动力学2025，Vol.45Issue(6)：593-598,6.DOI:10.14075/j.jgg.2024.05.255
山西地区应力场的时间变化特征研究
Temporal Change Characteristics of Stress Field in Shanxi Province
摘要
Abstract
Based on the focal mechanism solutions of small earthquakes in Shanxi province since 2001,the time curve of 1D stress field is inverted.The results show that the azimuth angle change of the three main axes of the stress field in Shanxi province is generally stable,the plunge angles of σ1 and σ2 show synchronous reverse change,and the plunge angles of σ3 is nearly horizontal,revealing that the study area is a long-term stable horizontal tension structural stress field environment.From the tem-poral change of plunge angles,the stress field is divided into two periods including 2001-02-06 to 2008-12-19 and 2008-12-20 to 2023-07-31.The first period is the stress field of strike-slipping property,and the second period is the stress field of normal-fault property.During these two periods,most of the moderate earthquakes in Shanxi province match the corresponding stress field characteristics.The M9.0 earthquake in Japan,2001 did not significantly change the stress field in Shanxi province.关键词
震源机制解/应力场/时间变化/山西地区/中等地震Key words
focal mechanism solution/stress field/temporal change/Shanxi province/moderate earthquake分类
地球科学引用本文复制引用
王霞,宋美卿,吴昊昱,梁向军,吕睿,郭文峰,张娜..山西地区应力场的时间变化特征研究[J].大地测量与地球动力学,2025,45(6):593-598,6.基金项目
山西太原大陆裂谷动力学国家野外科学观测研究站研究课题(NORSTY2021-01,NORSTY2023-07,NORSTY2023-08) （NORSTY2021-01,NORSTY2023-07,NORSTY2023-08）
地震预测开放基金(XH24004D) （XH24004D）
中国地震局地震科技星火计划(XH200403Y) （XH200403Y）
山西省科技厅青年基金(201901D211548) （201901D211548）
北京市自然科学基金(8232053). Project of National Continental Rift Valley Dynamics Observatory of Taiyuan,Shanxi,No.NORSTY2021-01,NORSTY2023-07,NORSTY2023-08 （8232053）
Open Fund of Earthquake Prediction,No.XH24004D （）
The Spark Program of Earthquake Technology of CEA,No.XH200403Y （）
Youth Fund Project of Shanxi Province,No.201901D211548 （）
Natural Science Foundation of Beijing,No.8232053. （）
