| 玉树7．1级地震前后波速比变化特征分析 |
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| 引用本文： | 姚家骏,王培玲,刘文邦.玉树7．1级地震前后波速比变化特征分析[J].高原地震,2012,24(3):6-10. |
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| 作者姓名： | 姚家骏 王培玲 刘文邦 |
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| 作者单位： | 青海省地震局,青海西宁,810001 |
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| 基金项目： | 地震科技星火计划项目，2012年度青年震情跟踪课题 |
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| 摘 要： | 利用玉树、曲玛莱、杂多地震台观测到的数字震相资料，研究玉树Ms7．1级地震前后波速比时间演化特征。研究发现：3个台站平均波速比、波速比标准偏差在地震前后变化不相同，Ms4．7级前震发生时3个台站波速比都出现较明显的高值回返现象，其中玉树地震台波速比数值高达2．032。
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| 关 键 词： | 玉树7．1级地震 波速比 高值回返 |
ANALYSIS ON THE VARIATION OF WAVE VELOCITY RATIO BEFORE AND AFTER YUSHU Ms7. 1 EARTHQUAKE |
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| YAO Jiajun,WANG PeUing,LIU Wenbang.ANALYSIS ON THE VARIATION OF WAVE VELOCITY RATIO BEFORE AND AFTER YUSHU Ms7. 1 EARTHQUAKE[J].Plateau Earthquake Research,2012,24(3):6-10. |
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| Authors: | YAO Jiajun WANG PeUing LIU Wenbang |
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| Institution: | (Earthquake Administration Of Qinghai Province, Xining 810001, China) |
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| Abstract: | Using the digital seismic phase data observed by Yushu, Qumalai and Zaduo seismic stations, the characteristics of wave velocity ratio evolution before and after Yushu Ms7.1 earthquake are analyzed. The re- suits show that＇ the mean values of wave velocity ratio and standard deviation were not same before and after Yushu Ms7.1 earthquake in those stations, there was an obvious phenomenon of high - value return in all these stations when the Ms4. 7 foreshock occurred, the wave velocity ratio of Yushu station was 2. 032. |
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| Keywords: | Yushu Ms7 1 earthquake Wave velocity ratio High -value return |
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