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新疆地区2000 ~ 2012 年加卸载响应比时空演化特征分析
唐兰兰1) 刘月2) 刘建明1) 温少妍1) 李金1) 尼鲁帕尔·买买吐孙1)
1)新疆维吾尔自治区地震局,乌鲁木齐市新市区科学2 街338 号830011;2)中国科学院力学研究所非线性力学国家重点实验室,北京100080
摘要:
对新疆地区进行了加卸载响应比的时空扫描计算,考察了研究区2000 ~ 2012 年期间加卸载响应比异常区域的时空演化特征,利用孕震积分定量统计了新疆地区5 级以上地震与LURR 的时空关系;并用2011 ~ 2012 年的扫描结果与次年实际发生的5 级以上地震进行对比,发现绝大部分的中强地震都发生在前1 年的预测区域内。基于加卸载响应比的时空扫描结果,分别对2011 ~ 2012 年发生的4 个6 级地震进行了孕震积分时程曲线分析,结果显示,实际地震发生之前几个月孕震积分均会达到峰值,并在高值波动过程中或高值回落后发震。
关键词:  加卸载响应比( LURR)  孕震积分  时空扫描  新疆地区
DOI:
分类号:
基金项目:地震科技星火计划项目( xh13027)资助
Study on the tempo-spatial evolution of LURR in the Xinjiang region in 2000 ~ 2012
Tang Lanlan1) Liu Yue2) Liu Jianming1) Wen Shaoyan1) Li Jin1) Nilupar Tursun1)
1) Earthquake Administration of Xinjiang Uygur Autonomous Region,Urumqi 830011,China; 2) State Key Laborator of Nonlinear Mechanics,Institude of Mechanics,Chinese Academy of Sciences,Beijing 100190,China
Abstract:
The tempo-spatial scanning of Load /Unload Response Ratio in the Xinjiang region was conducted,and the evolutionary characteristics of tempo-spatial of LURR abnormal regions in 2000 ~ 2012,and the statistics of the quantitative relations between earthquakes and tempo-spatial evolution of LURR were researched on the basis of integral of LURR. The scanning results during 2011 ~ 2012 and the MS≥5. 0 earthquakes happened in the second year were compared. The result shows that most of moderately strong earthquakes happened in the predicted region preceding year. The variation of integral of LURR against time for four earthquakes with MS6. 0 in the Xinjiang region in 2011 ~ 2012 has been calculated respectively. The result shows that integral of LURR will reach peak value several months before the earthquakes,and earthquakes will happen during the course of high value fluctuation or fall back.
Key words:  LURR Integral of LURR  Tempo-spatial scanning  The Xinjiang region