新西兰地区地震活动时空分布的多重分形特征研究  

RESEARCH ON THE MULTIFRACTAL CHARACTERISTICS OF THE TEMPORAL-SPATIAL DISTRIBUTION OF EARTHQUAKES OVER NEW ZEALAND AREA

作　　者：陈时军[1] David Harte 马丽[3] 王丽凤[3] 

机构地区：[1]山东省地震局,中国济南250014 [2]新西兰统计学联合会 [3]中国地震局分析预报中心,中国北京100036

出　　处：《地震学报》2003年第3期298-307,共10页Acta Seismologica Sinica

基　　金：国家自然科学基金 (40 0 74 0 13);新西兰Marsden基金 (0 0 SRA 0 0 2 MIS)

摘　　要：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 .Using the Hill estimator, general multifractal characteristics of events in the New Zealand area have been discussed. Results show that the spatial distribution of shallow events has apparent clustering characteristics, independent 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 scaling range, the Hill estimates tend to indicate that the time interval distribution has a unifractal rather than a multifractal nature. All above reveal that the seismicity nature for shallow and deep events is apparently different.

关 键 词：新西兰地区 地震活动 时空分布 多重分形 单重分形 浅源地震 深源地震 震中分布 

分 类 号：P315.5[天文地球—地震学]