滇西北至滇南强震危险区地震活动能量场分析  

Analysis on Energy Field of the Seismic Activity in Earthquake Hazard Area from the Northwest to the South of Yunnan

作　　者：罗国富[1] 屠泓为[2] 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 [2]青海省地震局,青海西宁810001

出　　处：《地震研究》2011年第4期435-441,565,共7页Journal of Seismological Research

基　　金：宁夏地震局指令性课题"中强以上地震震后趋势判定及强余震的预测"资助

摘　　要：运用随机函数理论,将滇西北至滇南地区的地震活动能量场看作时间和空间的随机函数,用自然正交函数展开方法,研究主要能量场的时间权重系数变化曲线、空间等值线图和研究时段内的均值能量场空间分布。结果发现,能量场的时间权重系数变化曲线较大幅度的升、降变化异常预示了可能发生强震的时间段,而等值线图的高值变化异常对应了可能发生强震的区域。According to the Random Function Theory, we take the seismic energy field from the northwest to the south of Yunnan as a spatial-temporal random function, and study the isogram chart of the time weight coefficient of several typical sub-fields, spatial contour, and distribution of the average energy field by the expansion of natu- ral orthogonal function. We find that the curve＇s sharp rise and fall suggests the occurrence time of the strong earthquakes, while the high-value anomaly of the spatial contour suggests the risk zone of the strong earthouakes.

关 键 词：地震能量场 随机函数 地震危险区 时空分布 滇西北 滇南 

分 类 号：P315.75[天文地球—地震学]