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  赖爱京,张锦萍,蒋志英,黄帅堂.2016年7月19日新疆M 4.5级地震乌什地震台形变异常[J].震灾防御技术,2017,12(2):433-440, DOI:10.11899/zzfy20170221.

2016年7月19日新疆M 4.5级地震乌什地震台形变异常
摘要:    利用乌什台数字化前兆形变观测资料,分析乌什MS 4.5级地震前乌什台水管倾斜仪、洞体应变仪数据变化情况。通过对比分析发现:地震前,洞体应变仪北南分量数据曲线正常,东西分量数据曲线加速拉张, 05:14-20:32拉张幅度达到7.40×10-7, 7月19日5时至20日16时乌什洞体应变仪东西分量快速拉张了9.20×10-7; 7月19日5-19时,水管倾斜仪北南分量数据曲线正常,东西分量数据曲线反向西倾7.13ms,且05:59-06:06、07:36-07:46、18:42-18:56数据掉格,水管倾斜仪异常结束后1小时,在洞体应变仪异常过程中发生了乌什MS 4.5级地震。水管仪东西分量震前反向西倾,洞体应变仪东西分量震前拉张加速,短临异常明显,且2套形变观测震前异常时间同步性较好。
作者单位
赖爱京 阿克苏中心地震台, 新疆维吾尔自治区阿克苏 843000 
张锦萍 阿克苏中心地震台, 新疆维吾尔自治区阿克苏 843000 
蒋志英 阿克苏中心地震台, 新疆维吾尔自治区阿克苏 843000 
黄帅堂 阿克苏中心地震台, 新疆维吾尔自治区阿克苏 843000 
关  键  词:乌什MS 4.5地震  水管仪  洞体应变仪  短临异常
DOI:10.11899/zzfy20170221
基金项目:新疆维吾尔自治区地震局科学基金(2015206),中国地震局监测、预测、科研三结合课题(163102)
收稿日期:2016-08-29
作者简介:赖爱京,女,生于1968年。高级工程师。主要从事数字化前兆监测工作。E-mail:mailto:xjlaij68@163.com
通讯作者:
Analysis on Seismic Anomalous of Deformation Caused by the Wushi MS 4.5 Earthquake
Abstract:      We used Wushi digital precursory deformation observational data to analyze the water tube-tilt and cave strain changes before the Wushi MS 4.5 earthquake. Through comparative analysis we found that before the Wushi MS 4.5 earthquake, the north-south strain component recorded in the Wushi cave instrument is normal, but the east-west component value changes greatly. The amplitude of stretching is 7.40×10-7 from 05:14 to 20:32. From 05:00 to 19:00 on July 19, the east-west component records from the Wushi water-pipe tilt meter is normal and the east-west component value is reverse to westward inclination 7.13ms. Moreover, the recorded data drop out at 05:59 -06:06, 07:36-07:46, and 18:42-18:56. The water pipe inclinometer abnormal was observed after 1 hour, in the process of the body strain gauge anomaly Wushi MS 4.5 earthquake occurred. The EW component of water tube-tilt from Wushi station west-dipping reverse, cave stuff strain tensile EW component rapid tension before the earthquake, short-impending anomalies before the seismogenic, and the two sets of deformation observation of seismic anomalous have a good agreement to each other.
Keywords:  Wushi MS 4.5 earthquake  Tube-tilt  Cave strain  Short-impending anomalies
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