摘要
采用超限率及S变换方法,对天山中段地区10套分量钻孔应变资料进行分析,提取到4套应变资料在精河M_(S)6.6地震前存在高频异常,总结高频异常特征,并结合GPS分析结果进一步验证异常的可信度。结果显示:超限率变化与S变换高频信号具有很好的同步性,其长周期演化特征表现为震前逐步增强,达到峰值,震后或临震前衰减消失;短周期高频信号的频段主要集中在10~120 min;应变高频异常与GPS分析结果具有较好的一致性。研究结果可为新疆分量钻孔应变的震例研究提供参考。
Using S-transform and overrun rate analysis method,10 sets of component borehole strain data in the middle section of Tianshan were processed and analyzed,and the high-frequency anomalies before JingheM_(S)6.6 earthquake were extracted from 4 borehole strain,and their high-frequency anomaly characteristics were summarized.Combined with GPS analysis results to further verify the credibility of abnormality.The research results show that the overrun rate and S-transform high-frequency signals have good synchronization,and the high-frequency anomalies all show the evolution characteristics of gradual increase-to peak-attenuation disappear;and the frequency band of short period high frequency signal is mainly concentrated in 10~120 min;the high-frequency anomalies are consistent with the GPS analysis results.The results can provide a reference for the study of seismic examples of component borehole strain in Xinjiang.
作者
斯琴
关冬晓
王斌
SI Qin;GUAN Dong-xiao;WANG Bin(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)
出处
《内陆地震》
2022年第3期273-281,共9页
Inland Earthquake
基金
2020年自治区创新环境(人才、基地)建设专项—自然科学计划(自然科学基金)(2020D01A85).
关键词
钻孔应变
S变换
超限率
高频异常
Borehole strain
S-transform
Overrun rate
High-frequency anomaly
