| 台阵地震学方法及对间断面结构的研究进展 |
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| 引用本文： | 吕苗苗,徐小明.台阵地震学方法及对间断面结构的研究进展[J].CT理论与应用研究,2014(6):1041-1050. |
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| 作者姓名： | 吕苗苗 徐小明 |
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| 作者单位： | 中国地震局地球物理研究所,北京100081 |
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| 基金项目： | 中央级公益性科研院所基本科研业务专项（103901：南海及邻区地球内部间断面结构研究） |
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| 摘 要： | 地震台阵是为了监测核爆而发展起来的一种地震观测系统。近年来,地震台阵被推广到地球内部速度间断面的研究中并极大地推动了地震学的发展。本文主要介绍处理台阵资料的技术方法,如聚束、倾斜叠加、N次根叠加、频率波数法以及相位加权叠加等,并讨论各种方法的优缺点。在提取微弱但相关信号方面,重点讨论相位加权叠加方法及现有的研究成果。结果表明,这些方法都在不同程度上提高了记录的信噪比,高质量的台阵数据使得地球内部速度结构的成像研究更加精细。
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| 关 键 词： | 地震台阵技术 速度间断面 相位加权叠加 地球内部速度结构成像 |
Array Seismological Methods and its Progress in the Discontinuity Structure Research |
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| LV Miao-miao,XU Xiao-ming.Array Seismological Methods and its Progress in the Discontinuity Structure Research[J].Computerized Tomography Theory and Applications,2014(6):1041-1050. |
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| Authors: | LV Miao-miao XU Xiao-ming |
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| Institution: | (Institute of Geophysics, China Earthquake Administration, Beijing 100081, China) |
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| Abstract: | Seismic array is a seismic observation system originally built for detecting underground nuclear explosions. Nowadays, seismic array has been developed into the study of the Earth’s interior structure, and then greatly promotes the development of seismology. This article gives an introduction to the various seismic array techniques such as beam-forming method, slant stacking techniques, Nth root slant stack process, frequency-wave number analysis and phase-weighted stack, and discusses the advantages and disadvantages of the techniques. As to the detecting of weak but coherent arrivals, phase-weighted stack and its applications will be discussed. It turned out to be a great improvement of the signal-to-noise ratio（SNR） in different degree. These array data of high quality make it possible to research the fine-scale structure tomography of Earth’s interior. |
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| Keywords: | seismic array technique discontinuity phase-weighted stack the Earth’s interior structure tomography |
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