地壳形变熵

本文利用非平衡统计物理学的有关知识,提出了地壳形变熵的概念及计算公式,并结合垂直形变网给出了一种确定形变观测点关于“稳定”的概率P_i′的方法。作为算例,文章最后给出了菏泽5.9级地震过程中地壳形变熵的变化。结果表明,震前一段时间该地区地壳逐步由无序演化为有序的、远离平衡态的不稳定结构,直至临震的临界状态。     

Multifractal characteristics of general stress release（GSR）of earthquakes

Using multifractal spectrum estimating method based on the wavelet,the multifractal characteristics of GSR of earthquakes in China,Japan and New Zealand regions have been studied.It is shown that the multifractal spectra of GSR are obviously different in inter-and intra-plate regions.Moreover,though Japan and New ZeaIand are all located at the boundary of plates,West and East China are all characterized of continental tectonic structure,the multifractal spectra of GSR for both the two regions are also different.Further analysis shows that the natures of multifractal spectra of GSR are somehow related to the complexity of tectonics.     

新西兰地区地震活动时空分布的多重分形特征研究

利用多重分形维数谱估计的Hill方法，讨论了新西兰地震活动区地震活动的震源分布、震中分布以及时间间隔分布的多重分形特征．结果表明，该地区浅源地震的震中分布和震源分布在给定不同的起始震级的条件下均具有明显的丛集特征；对于中、深源地震这种特征不甚明显．而地震活动时间间隔分布则无论对于浅源和中、深源地震均呈单重分形的性质，但具有分形性质的尺度范围有较大的差别．这些结果表明，浅源地震与中、深源地震的活动特征显著不同．      

关于震级频度关系的一些讨论

讨论了地震活动的复杂性特征与震级频度的关系．认为一般情况下地震活动系统具有多重分形特征．文中利用多重分形的观点讨论了震级频度关系的形式，分析了震级频度关系出现非线性的可能的原因．作为示例，文中概要地讨论了新西兰近年来的地震活动bq谱．      

SiZer for exploration of inhomogeneous structure in temporal distribution of earth-quakes

Introduction Globally speaking, the temporal distribution of earthquake activities is very complex. Re- searches argued that it always characterizes random and clustering features. On the hypothesis that time series of earthquake activities can be depicted by stationary or nonstationary stochastic proc- esses, several stochastic models have been proposed such as stress release models (SRMs), epi- demic type aftershocks sequence (ETAS) models as well as Markov processes for strong earth- qua…     

地壳垂直形变的分维特征─以京、津、唐复测网为例

本文应用分数维的概念及方法，对京、津、唐地区１９６８─１９７５年的大面积地壳垂直形变复测成果数据处理后的结果进行了分维特征分析。结果表明，地震前该地区地壳垂直形变空间分布的分数维明显降低，地壳的有序性增强。本文认为，地壳垂直形变空间分布分数维能够明确地揭示地壳的有序程度，是一种较好地利用形变测量资料提取地震前兆异常的方法。     

山东地区地震危险性空间分布特征研究

概述山东省及其周边的地震环境,并以地震危险性概率分析方法研究山东地区峰值地震加速度空间分布特征。分析不同超越概率水准的峰值地震加速度的比值。结果表明,不同超越概率水准的地震危险性分析结果的比例关系对地震环境具有明显的依赖特征,且总体上服从对数正态概率分布。     

地震活动时间分布不均匀结构的多尺度检验分析

利用ldquo;非零导数显著性rdquo;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eta;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eta;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.      

Research on the multifractal characteristics of the temporal—spatial distribution of earthquakes over New Zealand area

Using the Hill estimator,general multifractal characteristics of events in the New Zealand area have been dis-cussed.Results show that the spatial distribution of shallow events has apparent clustering characteristics,inde-pendent of the threshold magnitude;but for deep events these characteristics are not clear.While the time interval distribution has obvious clustering characteristics both for deep and shallow events,although with a different scal-ing range,the Hill estimates tend to indicate that the time interval distribution has a unifractal rather than a multi-fractal nature.All above reveal that the seismicity nature for shallow and deepevents is apparently different.