Classification of Medium-Strong Earthquake Sequences and its Spatial Distribution Characteristics in oft-com:office:smarttags" />Yunnan
详细信息
- 责任者：Li Yongli (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：强震 ; strong earthquakes ; 大震 ; great earthquakes ; 云南 ; Yunnan Province
- 页码：p.255-261
- 图表：5 illus., 1 table, 17 refs.
- 分类号：0500
- issnNo：ISSN1000-0666
- isbnNo：CN53-1062/P
摘要
The medium-strong earthquakes(Ms≥5.0) from 886 A.D.to 2009 in Yunnan are classified as 3 sequential types—mainshock-aftershock,multiple mainshock,and single shock.Then the spatial distribution of the 3 types of the earthquakes is studied.We find that the mainshock-aftershock sequence is in the majority in Yunnan,and the multiple mainshock sequence takes the second place.These two types of sequence are widely distributed in Yunnan,and the single shock sequence is mainly distributed in the areas such as Dongchuan,Yuxi,Yinjiang,and so on.In the sub-region of Northwest Yunnan,the proportion of the 3 types of sequence is in accordance with the one in the whole Yunnan area.The multiple mainshock(Ms≥6.0) sequence in a special part(called Xiaodianxi) of the West Yunnan is dominant,and the mainshock-aftershock sequence(Ms6.0) reaches 90% of the total in Southwest Yunnan and 83% in Southeast Yunnan.In Northeast Yunnan,the proportion of the multiple mainshock sequence equals with that of the single earthquake sequence,meanwhile,the proportion of single earthquake(5.0≤M≤5.9) sequence is the highest in Yunnan.
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