噪声成像在地震预测研究中的现状与展望

发布时间：2018-11-06 20:03

【摘要】：近年来,随着噪声成像方法原理的成熟,其发展迅速,已经被众多学者所关注并广泛应用于地震研究领域.对两两台站记录到的长时间连续背景噪声进行互相关计算可以提取出台站间的经验格林函数,再利用层析成像方法得到不同时段地球内部的速度结构,以此来分析强震前后的波速差异,进而可以应用于地震预测研究.本文介绍了噪声成像的发展背景、方法原理及研究现状,分析其优缺点,并综述了其在地震预测研究中的应用与结果的可靠性,最后探讨其未来的发展方向与需要解决的问题.背景噪声在时间上稳定并可重复利用,有效地避免了传统地震成像因地震定位不精确和台站分布不均匀等因素所导致的不可重复性,有助于对地壳内部的波速变化进行实时监测,分析地壳内部区域应力状态的变化,将会促进地震预测方面的探索研究.
[Abstract]:In recent years, with the maturation of the principle of noise imaging, it has developed rapidly, and has been paid attention to by many scholars and widely used in the field of seismic research. The empirical Green's function can be extracted from the cross-correlation calculation of the long-time continuous background noise recorded by two stations, and then the velocity structure of the earth's interior in different periods can be obtained by using the tomography method. The difference of wave velocities before and after strong earthquakes is analyzed, which can be applied to earthquake prediction. This paper introduces the development background, method principle and research status of noise imaging, analyzes its advantages and disadvantages, summarizes its application in earthquake prediction research and the reliability of its results, and finally discusses its future development direction and problems that need to be solved. Background noise is stable and reusable in time, which effectively avoids the non-repeatability of traditional seismic imaging caused by inaccurate seismic location and uneven distribution of stations. It is helpful to monitor the variation of wave velocity in the crustal interior in real time and to analyze the change of regional stress state in the crust, which will promote the exploration and research of earthquake prediction.
【作者单位】：陕西省地震局;中国地震局兰州地震研究所;中国地震台网中心;
【基金】：中国地震局地震科技星火计划攻关项目(XH14049) 国家自然科学基金项目(41304048) 甘肃省科技计划(145RJZA186)联合资助
【分类号】：P315.7

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