全球强震活动性的某些统计特征
SOME STATISTICAL CHARACTERISTICS OF GLOBAL ACTIVITY OF LARGE EARTHQUAKES
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摘要: 根据阿部胜征新近研究和发表的均匀化全球大地震目录(1897——1980),获得如下几点关于全球强震活动性统计特征的初步认识:(1)本世纪六十年代中期之后,全球活动处于相对平静的阶段;(2)在全球活动高潮时段中b值偏低,大陆地震区的b值偏低;(3)据聚类分析方法研究序列的结果,全球不同的地震区内,存在几十年尺度的强震活动高潮幕和平静幕交替出现的现象;(4)北半球大陆浅源强震活动的空间分布和地球自转速率的变化特征有关。上述特征对估计全球和不同地震区的地震活动趋势可能有参考意义。Abstract: Based on the uniform catalogue of large earthquakes of the earth studied and published by K. Abe, some knowledge about global activity of strong shocks might be obtained. (1) The global seismicity is in a stage of relative quiesence since the late 1960 's. (2) The b-value is lower in continental seismic regions than in other regions (belts); the b-value is lower during the seismically active period than in a quiet one. (3) According to cluster analysis, it may be recongnized that the seismically active and quiet episodes occur alternatively in different seismic regions. (4) There may be some correlation between the distribution of epicenters of large shallow earthquakes in continents of the northern semisphere and the change in velocity of the earth's rotation.The above characteristics might be referential for evaluating the tendency of earthquake occurrence in some seismic regions.
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[1] Gutenberg, B. and C. F. Richter, Seismicity of the Earth and Associated Phenomena, Princeton Univetcity Press, 1954.
[2] Duda, S. J., Secular Seismic energy release in Circum——Pacific belt, Tectonophysics, 2, 409——452,1965.
[3] Bath.Mand S. J.Duda, some aspects of global seismicity, Seismological Institute, Uppsala, Swe——den, Report 1979, 1
[4] Abe, K., Magnitudes of large shallow earthquakes from 1904——1980, Phys. Earth Plant. Inter., 27,72——92. 1981.
[5] Abe, K. and S. Noguchi, Revision of magnitudes of large shallow earthquakes, 1897——1912, Phys. Earth Planet. Inter. 33, 1——11, 1983.
[6] Abe K., Complements to "Magnitudes of large shallow earthquakes from 1904——1980", Phys. Earth Planet. Int., 34, 17——23, 1984.
[7] K. Kasahara, Earthquake Mechanics, Combridge University Press. 1982.
[8] 马宗晋、傅征祥、薛峰,北纬20°——50°的大陆地震构造系,地质学报,58, 114—— 124, 1984.
[9] 茂木清夫,地震——その本性なさぐる,东京大学出版会,1981.
[10] 马宗晋、傅征祥、张郧珍、汪成民、张国民、刘德富,1966——1976年中国九大地震,地震出版社,1982.
[11] 方开泰、潘恩沛,聚类分析,地质出版社,1982.
[12] 洪时中,最优分割在地震分期中的应用,西北地震学报,6, 49——57, 1984
[13] 王碧泉、陈祖荫、王春珍,用聚类分布法研究强震孕育过程,地震学报,6,49——57,1984.
[14] Anderson, D. L., Earthquakes and rotation of the earth, Science.186, 49, 1974.
[15] Kanamori, H., The energy in great earthquakes,].Geophys. Res.,82, 2981, 1977.
[16] 傅征祥,岛弧——海沟地区浅源强震分布和地球自转,地球物理学报,27,53——63, 1984.[1] Gutenberg, B. and C. F. Richter, Seismicity of the Earth and Associated Phenomena, Princeton Univetcity Press, 1954.
[2] Duda, S. J., Secular Seismic energy release in Circum——Pacific belt, Tectonophysics, 2, 409——452,1965.
[3] Bath.Mand S. J.Duda, some aspects of global seismicity, Seismological Institute, Uppsala, Swe——den, Report 1979, 1
[4] Abe, K., Magnitudes of large shallow earthquakes from 1904——1980, Phys. Earth Plant. Inter., 27,72——92. 1981.
[5] Abe, K. and S. Noguchi, Revision of magnitudes of large shallow earthquakes, 1897——1912, Phys. Earth Planet. Inter. 33, 1——11, 1983.
[6] Abe K., Complements to "Magnitudes of large shallow earthquakes from 1904——1980", Phys. Earth Planet. Int., 34, 17——23, 1984.
[7] K. Kasahara, Earthquake Mechanics, Combridge University Press. 1982.
[8] 马宗晋、傅征祥、薛峰,北纬20°——50°的大陆地震构造系,地质学报,58, 114—— 124, 1984.
[9] 茂木清夫,地震——その本性なさぐる,东京大学出版会,1981.
[10] 马宗晋、傅征祥、张郧珍、汪成民、张国民、刘德富,1966——1976年中国九大地震,地震出版社,1982.
[11] 方开泰、潘恩沛,聚类分析,地质出版社,1982.
[12] 洪时中,最优分割在地震分期中的应用,西北地震学报,6, 49——57, 1984
[13] 王碧泉、陈祖荫、王春珍,用聚类分布法研究强震孕育过程,地震学报,6,49——57,1984.
[14] Anderson, D. L., Earthquakes and rotation of the earth, Science.186, 49, 1974.
[15] Kanamori, H., The energy in great earthquakes,].Geophys. Res.,82, 2981, 1977.
[16] 傅征祥,岛弧——海沟地区浅源强震分布和地球自转,地球物理学报,27,53——63, 1984.
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