| 微振动台阵记录中空间自相关法的时间延迟校正 |
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| 引用本文： | 李清河,何海兵,范小平,许汉刚,金淑梅.微振动台阵记录中空间自相关法的时间延迟校正[J].地震学刊,2011(3):269-274. |
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| 作者姓名： | 李清河 何海兵 范小平 许汉刚 金淑梅 |
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| 作者单位： | [1]江苏省地震局,南京210014 [2]镇江市地震局,江苏镇江212001 |
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| 基金项目： | 江苏省社会发展计划项目（BS2006084和BS2010754）资助 |
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| 摘 要： | 本文给出了微振动台阵的波长与台站对间距离的半理论-半经验关系;根据前人的理论和实验,指出微振动波场存在优势方向,即在有效波长范围内,微振动的各道记录存在相位差;提出了投影到某方位的相位校正公式和校正方法,由此实现空间自相关法的相关函数和相速度曲线的时间延迟校正,通过实例验证了该方法的有效性。
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| 关 键 词： | 微振动 台阵 微振动波场的优势方向 空间自相关法 时间延迟校正 |
Time Delay Correction of SPAC Method for Array Records of Microtremors |
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| LI Qing-he,HE Hai-bing,FAN Xiao-ping,XU Han-gang,JIN Shu-mei.Time Delay Correction of SPAC Method for Array Records of Microtremors[J].Journal of Seismology,2011(3):269-274. |
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| Authors: | LI Qing-he HE Hai-bing FAN Xiao-ping XU Han-gang JIN Shu-mei |
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| Institution: | 1.Earthquake Administration of Jiangsu Province,Nanjing 210014,China; 2.Earthquake Administration of Zhenjiang,Zhenjiang 212001,China) |
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| Abstract: | The semi-theoretical and semi-experimental relation between wavelength and distance between station pairs for array of microtremors was presented.Based on previous theoretical and experimental results, it is pointed out that the dominant direction exists in microtremors wave field,i.e.there are phase differences among microtremors＇ records from each channel in the range of effective wavelength.The phase correction method and expressions for projecting to some direction were presented and the time delay correction of correlation function and phase velocity curves of SPAC method was achieved.A case study shows that the method proposed is effective. |
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| Keywords: | microtremor array dominant direction of microtremors wave field space autocorrelation（SPAC）method time delay correction |
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