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.
出处
《地震研究》
CSCD
北大核心
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
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
seismic energy field
random function
earthquake risk zone
spatial-temporal distribution
nothwest of Yunnan
south of Yunnan
