【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。更多还原

【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.更多还原