基于射出长波辐射数据的震前异常时空分析法  

Spatial-Temporal Analysis Method of Preseismic Anomalies Based on OLR Data

作　　者：江小英 孔祥增 郭躬德 李南[2] 林岭 JIANG Xiao-Ying;KONG Xiang-Zeng;GUO Gong-De;LI Nan;LIN Ling(College of Mathematics and Informatics,Fujian Normal University,Fuzhou 350117,China;College of Computer and Information Sciences,Fujian Agriculture and Forestry University,Fuzhou 350002,China)

机构地区：[1]福建师范大学数学与信息学院,福州350117 [2]福建农林大学计算机与信息学院,福州350002

出　　处：《计算机系统应用》2020年第10期29-35,共7页Computer Systems & Applications

基　　金：国家自然科学基金青年项目(41601477);福建省引导性项目(2015Y0054)

摘　　要：射出长波辐射(Outgoing Long-wave Radiation,OLR)是研究前兆异常的一个重要参数,OLR数据中含有重要的前兆信息.因此本文提出一种基于OLR数据的震前异常分析方法-时空分析法,并通过2008年5月12日的汶川地震,2011年3月11日的日本地震,以及2013年4月20日的芦山地震3个震例详细阐述该算法的分析方法及实验结果,探索OLR数据中隐藏的前兆信息.实验结果表明,OLR数据中存在着重要的前兆信息.在3个震例发生前3个月左右,震中区域及其周边区域异常值都出现明显增大趋势,并且周边区域的异常现象可能比震中区域更明显.此外,还发现3个震例发生前,研究区域的正北方向异常值曲线都出现了明显的波峰,这一发现对于后续研究具有启发性意义.这一规律是否具有普遍性,仍需进一步验证.Outgoing Long-wave Radiation(OLR)is an important parameter in the study of precursor anomalies.OLR data contains important precursor information.Therefore,this study proposes a pre-seismic anomaly analysis method based on OLR data,the so called spatial-temporal analysis method.Then we apply the proposed method to analyze the Wenchuan earthquake on May 12,2008,the Japan earthquake on March 11,2011,and the Lushan earthquake on April20,2013.The experimental results show that there is important precursor information in OLR data.About three months before the occurrence of the three earthquake cases,the abnormal values in the epicenter area and its surrounding areas increased significantly,and the abnormal phenomenon in the surrounding area might be more obvious than the epicenter area.In addition,it is also found that before the occurrence of the three earthquakes,there were obvious peaks in the north direction anomaly curves in the studied areas.This finding is instructive for future work.Whether this rule is universal needs further verification.

关 键 词：前兆异常 射出长波辐射 时-空分析 计算机方法 

分 类 号：P315.72[天文地球—地震学]