5级以上地震前中小地震的统计研究

英文篇名：Statistical study on the earthquakes of M_L≥5.0 in China
中文刊名：地震地磁观测与研究
英文刊名：Seismological and Geomagnetic Observation and Research
作者：赵书礼 ; 朱元清 ; 盛菊琴 ; 罗桂纯
英文作者：Zhao Shuli~ 1) ; Zhu Yuanqing~ 1) ; Sheng Juqin~ 2) and Luo Guichun~ 3) 1)Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China 2)Earthquake Administration of Shanghai ; Shanghai 200062 ; China 3)Earthquake Administration of Ningxia Hui Autonomous Region ; Yinchuan 7500001 ; China 4)Institute of Earthquake Science ; China Earthquake Administration ; Beijing 100036 ; China
中文关键词：震前 ; 中小地震 ; 统计研究
英文关键词：Pre-earthquake ; minor and moderate earthquake ; statistical study
出版日期：2006-06-25
机构：中国地震局地球物理研究所,上海市地震局,宁夏回族自治区地震局,中国地震局地震预测研究所中国北京100081,上海市地震局,中国上海200062,中国上海200062
年：2006
期：03
出版单位：地震地磁观测与研究

摘要

通过对中国1980~2004年6月期间5级以上地震的研究,统计中国西部、华南、华北5级以上地震震前是否有系列小地震发生。结果表明:5级以上地震在震前不同时期,距震中近距离范围内有系列的小地震发生;在6级地震前50km范围内有系列3~4级地震发生,概率为44%左右;西部7级地震前会有系列的4~6级地震发生,发生4级地震的概率为44%左右,发生5~6级地震的概率为11%左右。
By means of the research on the events of M≥5.0 in China that occurred during the period from January 1980 to June 2004, the occurring of minor earthquakes before the events of M≥5.0 in Western, Northern and Southern China region was statistically studied. The result indicates that before a mainshock of M >5.0, a series of minor events in the different period and distances away from epicenters for the M≥5.0 events would occurred. The probability of earthquakes of M 6.0 with a series of pre-seismic events of M_L 3.0 to 4.0 occurred within 50 km away from its epicenter is 44%. However, before a mainshock of M 7.0 in western China, a series of events of M_L 4.0, M 5.0 and 6.0 occurred. The probability for the pre-seismic events of M_L 4.0 is 44% and 11% for those of M 5.0 and 6.0.

引文

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