摘要
The paper analyzes the variation characteristics of energy fields of seismicity 2.1≤M L ≤4.5 in Jiangsu and its neighboring areas during the period between January 1970 and December 2007.It also analyzes the variations of time "weight" coefficients of the major typical energy fields,using random function theory with seismic energy fields as a space-time random function field based on Empirical Orthogonal Function (EOF) expansion methods.The results show that the expansion accuracy of the first seven typical fields is 0.9244.The strength of seismic energy varies remarkably in different tectonic blocks in the study area.High value areas are in middle and southern Jiangsu,and the south Yellow Sea.The distribution of the typical fields also shows that it is an area that affects most significantly the seismic energy fields of the study region.The time "weight" coefficients of the first six typical fields vary with time,and the amplitude of the variations has strong temporal correlations with moderate-strong earthquakes in the region.
The paper analyzes the variation characteristics of energy fields of seismicity 2. 1 ≤ML ≤4.5 in Jiangsu and its neighboring areas during the period between January 1970 and December 2007. It also analyzes the variations of time ＂weight＂ coefficients of the major typical energy fields, using random function theory with seismic energy fields as a space-time random function field based on Empirical Orthogonal Function （EOF） expansion methods. The results show that the expansion accuracy of the first seven typical fields is 0. 9244. The strength of seismic energy varies remarkably in different tectonic blocks in the study area. High value areas are in middle and southern Jiangsu, and the south Yellow Sea. The distribution of the typical fields also shows that it is an area that affects most significantly the seismic energy fields of the study region. The time ＂weight＂ coefficients of the first six typical fields vary with time, and the amplitude of the variations has strong temporal correlations with moderate-strong earthquakes in the region.
基金
the Key Projects in the National S&T Pillar Program during the Eleventh "Five-year Plan" Period(2006BAC01B03-03-01),China Earthquake Administration
Youth Fund of Earthquake Administration of Jiangsu Province(2009),China
关键词
地震活动
时空特征
江苏省
能量场
邻近地区
时间相关性
经验正交函数
能源领域
Jiangsu and earthquakes
its neighboring areas
Energy Empirical Orthogonal Function
field of moderate and small Space-time characteristics
