地震地磁观测与研究2024，Vol.45Issue(2)：1-10,10.DOI:10.3969/j.issn.1003-3246.2024.02.001
2024年新疆乌什MS 7.1地震数据产品及其分析
Data products and the analysis of the 2024 MS 7.1 earthquake in Wushi,Xinjiang,China
摘要
Abstract
On January 23,2024,an MS 7.1 earthquake occurred in Wushi,Xinjiang Uygur Autonomous Region,where the Indian Plate and the Eurasian Plate collide.After the earthquake,the China Earthquake Networks Center(CENC)started the emergency response immediately,and the National Seismic Network Center rapidly outputted the seismic data products to provide basic data for the study of seismogenic tectonics and the assessment of seismic hazards in the seismic source area.Based on the data from the China Seismic Networks,the double-difference location method is used to relocate the Wushi mainshock and the sequence of 3 487 aftershocks within 38 days and the result shows that the location of the mainshock is(41.28°N,78.62°E),with a depth of 31 km,while the aftershock sequence is distributed from northeast to southwest,with a length of about 80 km,whose focal depth is predominantly distributed in the range of 30 km or shallower,with the fault plane trending to the northwest.Meanwhile,based on the obtained seismic location and previous source mechanism results,the Coulomb stress distribution at different depths of this earthquake is calculated by using the PSGRN/PSCMP code,and the result shows that the occurrence of the mainshock causes the source area a stress unloading status,while the triggering effect of the mainshock on the occurrence of aftershocks is analyzed.Finally,the instrumental intensity of this earthquake is calculated with the data from the China Earthquake Early Warning Network and shows that the maximum intensity value is Ⅸ,concentrated in a small region and mainly focused on the NEE direction.Based on the above results and the surrounding geological structure,the MS 7.1 event in Wushi,Xinjiang is considered to be a thrust-type earthquake with a left-lateral slip component.关键词
新疆乌什MS 7.1地震/精定位/震源机制/库仑应力/仪器烈度Key words
MS 7.1 earthquake in Wushi/Xinjiang/relocation/focal mechanism/Coulomb stress/instrumental intensity引用本文复制引用
李旭茂,邹立晔,张滨,张琪,张莹莹,梁姗姗..2024年新疆乌什MS 7.1地震数据产品及其分析[J].地震地磁观测与研究,2024,45(2):1-10,10.基金项目
中国地震台网中心提升性项目(项目编号:12350412227) （项目编号:12350412227）
