Strong Earthquake Risk Analysis in Yunnan
详细信息
- 责任者：Li Shuhua (Earthquake Administration of Yunnan Province ; Kunming 650224 ; China) ; Zhao Xiaoyan
- 刊名：Journal of Seismological Research
- 出版年：2011
- 卷期：34(3)
- 关键词：地磁场 ; geomagnetic field ; 地震危险性 ; seismic risk ; 云南 ; Yunnan Province
- 页码：p.262-265
- 图表：4 illus., 2 tables, 10 refs.
- 分类号：0500
- 出版序号：1595
- issnNo：ISSN1000-0666
- isbnNo：CN53-1062/P
摘要
Through fitting and monthly-anomaly analysis of the monthly mean value of the relative geomagnetic Z-component at Thonghai station since 1986, the authors find an evident variation of velocity of Z-component—accelerated rise or fall before the M≥6.0 earthquakes in Yunnan Province. From March 2009 to June 2010,the velocity of Z-component acceleratedly rose for 48.5 nT and the duration lasted for 15 months. According to the statistics of earthquake cases in Yunnan Province and the earthquake-prediction indexes, it is concluded that there exists a risk of earthquake with M6.0 or even M7.0 in one year or some time longer.
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