| 宁夏中北部区域尾波Qem>值特性研究 |
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| 引用本文： | 赵卫明,杨明芝,金延龙,许文俊,任雪梅.宁夏中北部区域尾波Qem>值特性研究[J].地震学报,2000,22(3):249-256. |
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| 作者姓名： | 赵卫明 杨明芝 金延龙 许文俊 任雪梅 |
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| 作者单位： | （中国银川750001 宁夏回族自治区地震局） |
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| 基金项目： | 宁夏回族自治区科委资助项目 |
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| 摘 要： | 在前人研究的基础上，本文在进行近震尾波Q值研究时，提出了用采样深度反应流逝时间对Q值影响的方法，同时对地震尾波的频率和采样深度依赖特性进行了探讨．通过对宁夏银川遥测台网数字化记录的分析表明:地震尾波Q值不仅对频率有着强烈的依赖性，对采样深度的依赖性也不可忽视；通常地震尾波Q值依赖特性公式Q＝Q0 f 0 中的参数Q0和n与采样深度关系密切，当采样深度增加时，Q0明显升高，n则降低，并可用线性关系进行拟合．本文对此特征进行了解释．因地震尾波产生机制比较复杂，此特征是否普遍存在，尚待更多的研究证实．
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| 关 键 词： | 尾波Q值 数字化记录 频带 流逝时间 采样深度 |
CHARACTERISTICS OF CODA Q-VALUE IN THE MID-NORTHERN PART OF NINGXIA |
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| Zhao Weiming,Yang Mingzhi,Jin Yanlong,Xu Wenjun,Ren Xuemei.CHARACTERISTICS OF CODA Q-VALUE IN THE MID-NORTHERN PART OF NINGXIA[J].Acta Seismologica Sinica,2000,22(3):249-256. |
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| Authors: | Zhao Weiming Yang Mingzhi Jin Yanlong Xu Wenjun Ren Xuemei |
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| Abstract: | On the basis of previous studies, this paper, in studying the coda Q value of near shocks, has proposed using the sampling depth to describe the effect of lapse time on the Q value, and has investigated the dependence of coda wave of earthquakes on frequency and sampling depth. Analysis of digital seismograms recorded by the Yinchuan Telemetric Seismic Network, Ningxia, shows that not only the coda wave Q value of shocks is strongly dependent on frequency but also its dependence on sampling depth can not be neglected. In the commonly used formula that describes the dependence characteristics of coda Q value of earthquakes, Q=Q 0 f-n, the parameter Q 0 rises obviously while n drops when the sampling depth increases, and their changes can be fitted by linear relations. This paper has explained such a characteristic. Whether this characteristic exists universally needs to be verified by more study results because the genetic mechanism of coda wave of earthquakes is more complex. |
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| Keywords: | coda Q value digital record frequency band lapse time sampling depth |
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