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
详细信息
- 责任者：Chen Xuezhong (Institute of Geophysics ; CEA ; Beijing 100081 ; China) ; Li Yane
- 刊名：Earthquake
- 出版年：2013
- 卷期：33(1)
- 关键词：地震 ; earthquakes ; 中国 ; China
- 页码：p.40-46
- 图表：illus., 4 tables, 15 refs.
- 分类号：0500
- issnNo：ISSN1000-3274
- isbnNo：CN11-1893/P
摘要
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.
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