摘要
利用“非零导数显著性”检验方法,分析了中国大陆东西部地区及青藏高原、新疆、东北、华北、华南以及台湾构造区内地震活动广义应变释放时间分布的不均匀结构.结果表明,当广义地震应变指数η取较小值时,新疆、华南、东北以及台湾构造区地震活动自1970年以来总体上呈长期增强趋势,而青藏高原与华北构造区则呈长期减弱的态势;在较小的时间窗宽情况下,各构造区均存在多尺度成丛特征,显示出地震活动在一定的尺度层次下的强弱交替现象.但当该η取较大值时,除青藏高原与台湾构造区在某些尺度时间窗宽内存在某些时段趋势性变化外,其它各构造区广义地震应变释放时间分布均无统计学意义上的显著变化.
In this paper, the inhomogeneous structure of generalized seismic strain release time series （GSSRTS） of earthquakes in East, West China and their subtectonic regions as Xinjiang, Qinghai-Xizang （Tibet） Plateau Northeast China, North China, South China and Taiwan have been analyzed by using the method of significant analysis on zero crossings of derivatives （SiZer）. Results show that when index η for estimating GSSRTS is close to zero and bandwidth is large enough, GSSRTSs feature significant increasing in Xinjiang, Northeast China, South China and Taiwan tectonic regions and decreasing in Qinghai-Xizang （Tibet） and North China tectonic regions since January 1, 1970 till January 1,2000. With the dwindling of bandwidth GSSRTSs in all the above tectonic regions characterize clustering, that is to say, significant increasing and decreasing emerge alternatively. When η is large enough, GSSRTSs would have no significant statistical variation in most of above tectonic regions except Qinghai-Xizang （Tibetan plateau） and Taiwan where significant increasing or decreasing hold in several time intervals within limited bandwidths.
出处
《地震学报》
CSCD
北大核心
2005年第5期532-542,共11页
Acta Seismologica Sinica
基金
山东省自然科学基金(Y2002E01)
山东省防震减灾"十五"重点项目(SD10503-02-05)
中国-希腊政府间2003-2005年科技合作项目资助.
关键词
“非零导数显著性”检验
非参数拟合
广义地震应变
中国大陆各构造区
significance analysis on zero crossings of derivatives （SiZer）
nonparametric fit
generalized seismic strain release time series （GSSRTS）
subtectonic regions in China
