地震地磁观测与研究2025，Vol.46Issue(5)：57-67,11.DOI:10.3969/j.issn.1003-3246.2025.05.008
2015年皮山MS6.5地震前地球物理异常综合分析
Comprehensive analysis of geophysical anomalies before the 2015 Pishan MS 6.5 earthquake
摘要
Abstract
The borehole tiltmeters are charactetized by high sensitivity and strong continuity,playing an important role in the field of crustal stress monitoring.Taking the 2015 Pishan MS 6.5 earthquake as an example,analysis of pre-earthquake observational data from the Hotan borehole tiltmeter revealed a rapid westward tilt of its EW component at 5:00 AM on February 24,2015,with a maximum amplitude of 2.6″,followed by a sharp southward tilt of the NS component at 1:00 AM on February 25,reaching 0.4″.Field verification and interference source elimination confirmed that these significant changes were caused by variations in crustal stress.Historical case studies of borehole tiltmeters at Hotan and other stations in Xinjiang further indicated that this anomaly was a seismic geophysical anomaly.Analysis of geoelectric field data from the same station showed that the dominant azimuth angle exhibited distinct anomalies prior to the Pishan MS 6.5 earthquake.Therefore,the data variations observed in the Hotan borehole tiltmeter are classified as pre-earthquake anomalies.关键词
皮山MS6.5地震/钻孔倾斜仪/形变异常/地电场优势方位角Key words
Pishan MS 6.5 earthquake/borehole tiltmeter/deformation anomaly/dominant azimuth angle of the geoelectric field引用本文复制引用
杨恒岳,陈亮,刘岩,张勇,张锋,王秋月,阿力木·亚森,麦麦提敏·图尔贡,邱大琼..2015年皮山MS6.5地震前地球物理异常综合分析[J].地震地磁观测与研究,2025,46(5):57-67,11.基金项目
新疆地震青年科学基金课题(项目编号:202527) （项目编号:202527）
