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地震 ›› 2013, Vol. 33 ›› Issue (1): 40-46.

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中国大陆MS≥5.0地震年频次与MS≥7.0地震发生之间的关系及显著性检验

陈学忠, 李艳娥   

  1. 中国地震局地球物理研究所, 北京 100081
  • 收稿日期:2012-01-13 修回日期:2012-06-15 出版日期:2013-01-31 发布日期:2020-10-16
  • 作者简介:陈学忠(1963-),男,重庆永州人,研究员,主要从事数字地震学及地震预报等研究。
  • 基金资助:
    中国地震局地球物理研究所基本科研业务专项(DQJB11C09)

Relationship between the Annual Numbers of MS≥5.0 Earthquakes and the Occurrences of MS≥7.0 Earthquakes in the Chinese Mainland and Its Significance Test

CHEN Xue-zhong, LI Yan-e   

  1. Institute of Geophysics, CEA, Beijing 100081, China
  • Received:2012-01-13 Revised:2012-06-15 Online:2013-01-31 Published:2020-10-16

摘要: 利用中国大陆1930年以来的5级以上地震目录, 以年为单位统计7级以上地震, 只要某年发生了7级以上地震就视为“有震年”, 不区分该年发生了多少次7级以上地震, 若某年没有发生7级以上地震就视为“无震年”。 分析5级以上地震年频次与“有震年”或“无震年”之间的关系, 利用χ2检验方法对其显著性进行检验。 结果表明: ① 当5级以上地震年频次N>30时, 其后第6年为“无震年”, 这个关系在2%的显著水平下通过显著性检验; ② 当5级以上地震年频次N≥24时, 其后第6年或第9年为“无震年”, 这个关系分别在10%和2%的显著水平下通过显著性检验; ③ 当N<10时, 其后第6年为“有震年”, 这个关系在2%的显著水平下通过显著性检验。

关键词: 中国大陆地区, 5级以上地震年频次, 7级以上地震, 显著性检验

Abstract: The years whether MS≥7.0 earthquakes occurred or not are investigated by using the MS≥5.0 earthquake catalog occurred in the Chinese mainland.The year when an MS≥7.0 earthquake occurred is called “earthquake year”, and the year when no MS≥7.0 earthquake occurred is called “no-earthquake year”. The relationships between the annual numbers of MS≥5.0 earthquakes and “earthquake year” or “no-earthquake year” are analysed, and χ2 test method has been employed to test the significance.The results obtained are as follows: ① If the annual nember of the MS≥5.0 earthqaukes is greater than 30 in some year, the sixth year later is “no-earthquake year”. The test of significance for this relationship can be passed under the significance level of 2 percent; ② If the annual nember of MS≥5.0 earthqaukes is greater than or equal to 24 in some year, the sixth and ninth years later are “no-earthquake year”. The tests of significance for these two relationships can be passed under the significance level of 10 and 2 percent respectively; ③ If the annual nember of MS≥5.0 earthqaukes is less than 10 in some year, the sixth year later is “earthquake year”. The test of significance for this relationship can be passed under the significance level of 2 percent.

Key words: Annual nember of MS≥5.0 earthqaukes, MS≥7.0 earthquakes, Significance test, Chinese mainland

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