李涛, 吴小平, 王莹. 基于分区空间扫描研究云南地区b值分布特征[J]. 云南大学学报(自然科学版), 2010, 32(6): 670-675 .
引用本文: 李涛, 吴小平, 王莹. 基于分区空间扫描研究云南地区b值分布特征[J]. 云南大学学报(自然科学版), 2010, 32(6): 670-675 .
LI Tao, WU Xiao-ping, WANG Ying. Study on b-value distributions in Yunnan based on regional spatial scanning[J]. Journal of Yunnan University: Natural Sciences Edition, 2010, 32(6): 670-675 .
Citation: LI Tao, WU Xiao-ping, WANG Ying. Study on b-value distributions in Yunnan based on regional spatial scanning[J]. Journal of Yunnan University: Natural Sciences Edition, 2010, 32(6): 670-675 .

基于分区空间扫描研究云南地区b值分布特征

Study on b-value distributions in Yunnan based on regional spatial scanning

  • 摘要: 采用最大似然法对云南各地震分区进行b值空间扫描计算,得到了云南地区不同分区的b值分布图像,在此基础上分析了云南地区地震活动的空间分布特征.结果显示,云南地区b值的总体空间分布呈现东低西高的特征,强震大都发生于相对的高b值与低b值区的分界部位,而且这些发震部位处的b值一般在0.65~0.75,低于平均值0.818.

     

    Abstract: The maximum-likelihood method is used for spatial scanning calculation of b-value.The patterns of b-value distribution in different regions in Yunnan are obtained.Based on it,the characteristics of seismic activity in Yunnan are analyzed.The results show that the b value in Yunnan is generally high in west and low in east.Most of strong earthquakes occurred at the boundary of high and low b-value region.In addition,the b values at the locations where strong earthquakes occurred are 0.65—0.75,which are smaller than the average b-value 0.818.

     

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