Dynamic Evolution Characteristics of Seismicity Factor A-Value Abnormity before Strong Earthquakes in Yunnan Province

详细信息   

• 责任者：Liu Xiang (Earthquake Administration of Yunnan Province ; Kunming 650224 ; China) ; Su Youjin
• 刊名：Journal of Seismological Research
• 出版年：2012
• 卷期：35(2)
• 关键词：地震活动性 ; seismicity ; 因子分析 ; factor analysis ; 云南 ; Yunnan Province
• 页码：p.163-170
• 图表：4 illus., 8 refs.
• 分类号：0500
• issnNo：ISSN1000-0666
• isbnNo：CN53-1062/P

摘要

The authors studied the temporal and spatial dynamic evolution of seismicity factor A value before strong earth quakes, especially before the first shock in the active period of strong earthquakes in Yunnan Province. The results show as follows ：  1 ) A-value would appear evident high value near future epicenters during 1~2 years before strong earthquakes, abnormal value is A ≥0.6; and 2) the high value anomalous areas of A ≥0.6 mainly distributed in the surrounding areas or the boundary areas of Yunnan Province, but rarely distributed in the inner of Yunnan Province during 3~4 years before strong earthquakes.