| 晋冀蒙交界区瑞利波速随时间变化特征 |
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| 引用本文： | 宫猛,张素欣,王想,王亚茹.晋冀蒙交界区瑞利波速随时间变化特征[J].地震地磁观测与研究,2014,35(5):33-38. |
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| 作者姓名： | 宫猛 张素欣 王想 王亚茹 |
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| 作者单位： | 1. 中国石家庄050021 河北省地震局;中国北京100083 中国地震局地质研究所
2. 中国石家庄050021 河北省地震局 |
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| 基金项目： | 中国地震局震情跟踪定向工作任务 |
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| 摘 要： | 以冀晋蒙交界区为研究中心,利用2010年1月-2013年5月冀晋蒙交汇区部分数字地震观测台网资料,通过波形互相关,获取研究区内台站对之间瑞利波速度随时间的变化特征.结果表明,背景噪声互相关方法获取的相对地震波速度变化可用于监测地壳内部物性介质的变化,但在一定程度上受到季节变化影响.研究区瑞利波速度2011-2012年波动较大,可能是该时段环太平洋区强/大地震活动引起华北区应力场调整变化的反映,2013年后瑞利波速度变化基本在零值附近波动,表明研究区地下介质物性变化处于相对稳定阶段.
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| 关 键 词： | 瑞利波 波形互相关 波速变化 |
Temporal changes of Rayleigh wave velocity around Shanxi Province-Heibei Province-Inner Mongolia-Ji-Meng cross area |
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| Gong Meng,Zhang Suxin,Wang Xiang,Wang Yaru.Temporal changes of Rayleigh wave velocity around Shanxi Province-Heibei Province-Inner Mongolia-Ji-Meng cross area[J].Seismological and Geomagnetic Observation and Research,2014,35(5):33-38. |
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| Authors: | Gong Meng Zhang Suxin Wang Xiang Wang Yaru |
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| Institution: | Gong Meng , Zhang Suxin , Wang Xiang, Wang Yaru( 1) Earthquake Administration of Hebei Province, Shijiazhuang 050021, China 2) Institute of Geology, China Earthquake Administration, Beijing 100083, China) |
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| Abstract: | In this paper, we collect continue seismic wave data from broadband seismic stations de- ployed in the Shanxi Province-Heibei Province-Inner Mongolia cross area from January, 2010 to May, 2013. We use wave cross-correlation to measure the Rayleigh wave velocity changes between the station-pair. Our results show that this method can he used to monitor the medi- um changes of crustal. But it would be effect by the season variation. The Rayleigh wave ve- locity change presented large fluctuate during the year 2011 to 2012, which may relate to the strong earthquakes occurred around Pacific Rim during these time, and they in turn can cause the stress field adjustment in North China. After the year 2013, the curves of velocity fluctu- ation around zero may mean the study area underground medium property is in the stable stage, relatively. |
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| Keywords: | Rayleigh wave wave cross-correlation velocity change |
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