|本期目录/Table of Contents|

[1]李永莉,毛慧玲,苏有锦.滇西地区近期强震前的波速比异常演化*[J].地震研究,2009,(01):6-11.
　LI Yong-li,MAO Hui-ling,SU You-jin.Evolution of Wave Velocity Ratio Anomaly before Current Strong Earthquakes in West Yunnan[J].Journal of Seismological Research,2009,(01):6-11.
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滇西地区近期强震前的波速比异常演化*(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
期数:
2009年01期
页码:
6-11
栏目:
出版日期:
2009-01-23

文章信息/Info

Title:
Evolution of Wave Velocity Ratio Anomaly before Current Strong Earthquakes in West Yunnan
作者:
李永莉; 毛慧玲; 苏有锦
(云南省地震局, 昆明 650224)
Author(s):
LI Yong-li; MAO Hui-ling; SU You-jin
(Earthquake Administration of Yunnan Province,Kunming 650224,Yunnan,China)
关键词:
滇西地区;  强震;  波速比异常
Keywords:
West Yunnan;  strong earthquake;  wave velocity ratio anomaly
分类号:
P315.3+1
DOI:
-
摘要:
利用云南地区地震波记录资料,对滇西地区1998年以来5次MS≥5.8强震前的波速比异常进行了动态追踪,结果表明:滇西地区强震前1～3年会形成一个长60～160 km的椭圆形低波速比异常区,强震通常发生于异常区边缘、异常交错部位或低波速异常区外围60 km范围内。低波速比异常区出现的高波速比(≥1.90)点,除2001年施甸5级震群外,对应的强震孕育时间的长短与强震震中距的大小有类似反比的关系。
Abstract:
Using the earthquake wave data recorded by Yunnan Regional Digital Network,we dynamically trace the anomalies of wave velocity ratio before 5 earthquakes with M≥5.8 in West Yunnan since 1998.The results show that the anomalous areas formed as a ellipse about 60-160 km long 1-3 years before the earthquakes,and the earthquakes usually occurred at the edge and meeting area of anomaly areas,or the range of 60 km from the periphery of low-value anomaly area.There are 11 high-value points(≥1.90)in the low-value areas of wave velocity ratio.We analyze the relation between the points and the strong earthquakes which they correspond to,and find the preparation time of the strong earthquakes,except the 2001 Shidian earthquake swarm,varies inversely with the distance of point to earthquake.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2008-10-23
基金项目:国家科技支撑计划(2006BAC01B03-04-01)资助.

更新日期/Last Update: 2009-01-23