新疆多次强震前RTL异常演化特征分析  

ANALYSIS OF SEISMICITY CHANGES PRIOR TO STRONG EARTHQUAKE IN XINJIANG BASED ON REGION-TIME-LENGTH ALGORITHM

作　　者：尼鲁帕尔.买买吐孙 向元[1] 唐兰兰[1] 

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2017年第4期361-367,共7页Inland Earthquake

基　　金：新疆地震科学基金(201602)

摘　　要：利用RTL算法,以阿克陶6.7级地震和呼图壁6.2级地震为例,分别对喀什—乌恰交汇区和天山中段独山子—吐鲁番地区进行回顾性时间扫描计算。研究结果表明,2个研究区内发生的多次6级地震前RTL时间扫描结果均有显著的异常现象,喀什—乌恰交汇区RTL异常呈现"上升—转折下降"的凸型形态,天山中段则呈现"下降—转折上升"的凹型形态,RTL的异常表现(实际表征地震活动水平的增强与减弱),可能与研究区的应力状态,构造环境和破裂特征等有关。在未来震中未知情况下,本文中选取研究区中心坐标进行RTL时间扫描,为实际地震预测研究提供一定参考依据。In this paper,we take Aketao earthquake with MS6. 7 and Hutubi earthquake with MS6.2 as an example,to respectively study the temporal RTL changes of Kashi-wuqia interaction zone and Dashanzi-Turpan area in the middle Tianshan Mountain. The results show that there are obvious seismic anomalies in the RTL time scans before these strong earthquakes in the two study areas. The RTL anomaly in Kashi-Wuqia intersection area shows a convex shape of "rising-turning down",and the middle of the Tianshan Mountains shows a concave shape with a "decline-turning up",an abnormal performance of the RTL( which characterizes the enhancement and attenuation of the seismic activity level) which may be related to the stress state,tectonic environment and fracture characteristics of the study area. For the unknown epicenter of the coming earthquake,this paper chooses the center coordinates of the study area for the RTL time scanning,which provides a reference for the actual earthquake prediction research.

关 键 词：RTL算法 时间扫描 阿克陶6.7级地震 呼图壁6.2级地震 

分 类 号：P315.7[天文地球—地震学]