芦山7.0级地震区域地震活动能量场分析  

ANALYSIS OF REGIONAL SEISMIC ENERGY FIELD BEFORE LUSHAN MS7.0 EARTHQUAKE

作　　者：罗国富[1] 马小军[1] 马禾青[1] 杨明芝[1] 

机构地区：[1]宁夏回族自治区地震局,宁夏银川750001

出　　处：《防灾减灾学报》2015年第1期54-58,共5页Journal of Disaster Prevention And Reduction

基　　金：地震科技星火计划项目(XH13024Y)"南北地震带强震危险区地震活动能量场研究"资助

摘　　要：运用随机函数理论,系统研究2013年芦山7.0级地震前区域地震活动能量场的时空特征。结果表明,四川芦山7.0级地震前能量场的前2个主要特征值对应的典型能量场时间因子出现明显上升变化,可能是该次地震的中短期时间异常特征;而主要典型场的空间等值线形成局部能量高值异常危险区,该区域可能是芦山7.0级地震的中短期空间异常特征。Taking the seismic activity as the random field and taking the energy released by earthquakes as the basic elements of the seismic field, the method of natural perpendicular function （ or named experiential perpendicular function ） development has been adopted to discuss the spatiotemporal features about the energy field of the regional seismic activity before Ms7.0 earthquake, Lushan, 2013. The results show that fiefore Lushan Ms 7.0 earthquake, the time weight factors of the typical energy field two key eigenvalues correspond to before Lushan earthquake have appeared very evident rising changes. It may be the medium-short-time abnormal. The spatial image of the key typical fields has showed danger zone of high value abnormal of local energy field. Because of the region of high energy release zone being large, energy release of the Lushan Ms7.0 earthquake may be short, and the strong earthquake may be occur again in the region in the future.

关 键 词：能量场 随机函数 时间因子异常 芦山7.0级地震 

分 类 号：P315.5[天文地球—地震学]