| 用双差波速比方法分析2014—2015年安徽金寨震群 |
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| 引用本文： | 贾漯昭,王志铄,张亚琳,邢康.用双差波速比方法分析2014—2015年安徽金寨震群[J].地震,2017,37(1):112-120. |
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| 作者姓名： | 贾漯昭 王志铄 张亚琳 邢康 |
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| 作者单位： | 河南省地震局, 郑州 450018 |
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| 基金项目： | 中国地震局震情跟踪定向工作任务(2016010131)资助 |
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| 摘 要： | 使用扣除同一个地震台站记录到的两个距离相近地震的地震波的相同路径, 把波速比指示范围限制在地震集中区的方法计算波速比值。 利用区域台网记录到的地震波形和震相数据, 对2014年8月~2015年8月间, 安徽金寨地区发生的小震震群进行波速比计算, 分析了该方法在该地区震相数据上的误差影响和应用情况。 得到金寨震群震中集中区的波速比值。 结果显示, 震中集中区波速比略低, 结合当地断层分布情况, 这可能体现了该区域的介质硬度稍高, 应力积累高于周边区域。
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| 关 键 词： | 双差 波速比 2014—2015年金寨震群 |
| 收稿时间： | 2016-06-13 |
Analysis of the 2014—2015 Jinzhai Earthquake Swarm by Double-difference VP/VS Ratio Method |
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| JIA Luo-zhao,WANG Zhi-shuo,ZHANG Ya-lin,XING Kang.Analysis of the 2014—2015 Jinzhai Earthquake Swarm by Double-difference VP/VS Ratio Method[J].Earthquake,2017,37(1):112-120. |
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| Authors: | JIA Luo-zhao WANG Zhi-shuo ZHANG Ya-lin XING Kang |
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| Institution: | Earthquake Administration of Henan Province, Zhengzhou 450018, China |
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| Abstract: | We proposed a method to estimate local VP/VS ratios for compact similar earthquake clusters using the precise P and S differential times. Two closely-spaced earthquakes have the same path to the station, through this method to deduct the same path to obtain the VP/VS ratios of the epicentral area. We calculated the VP/VS ratios of earthquake swarm in Anhui Jinzhai from August 2014 to August 2015. The result shows that the concentrated area is lower than the surrounding area. Combined with the fault distribution, our results may reflect that in this area crust medium is harder than the surrounding area, and stress accumulation is also higher than the surrounding area. |
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| Keywords: | VP/VS ratios Double-difference time The 2014—2015 Jinzhai earthquake swarm |
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