Distribution Characteristics of the Month-Scale and Week-Scale Numbers for Small Earthquakes around the Epicenter Prior to the April 14, 2010 Yushu Earthquake with Ms7. 1

详细信息   

• 责任者：Chen Xuezhong (Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China) ; Li Yan’e
• 刊名：Earthquake Research in China
• 出版年：2012
• 卷期：28(1)
• 关键词：玉树地震2010 ; Yushu earthquake 2010 ; 地震周期性 ; earthquake periodicity ; 青海 ; Qinghai Province
• 页码：p.10-21
• 图表：5 illus., 4 refs.
• 分类号：0500
• issnNo：ISSN1001-4683
• isbnNo：CN11-2008/P

摘要

The Kolmogorov-Smirnov test is adopted to test the distribution of the month-scale number since 2000 and the week-scale number since 2007 by using the earthquakes of 1.7≤M_L ≤2.9 occurring around the epicenter prior to the April 14, 2010 Yushu, Qinghai Province earthquake with M_s7.1. The results show that the weekly number and the monthly number agree with neither the normal distribution nor the Possion distribution. And the relationship between the accumulative frequency of the weekly and monthly numbers and the weekly and monthly numbers resembles the Gutenberg-Richter law. Analyzing the temporal changes of the parameters, the authors find that these parameters changed obviously prior to the April 14, 2010 Yushu, Q to change inghai Province earthquake of Ms7.1, and the parameters for the weekly number seem in a periodic way.