中国科学技术大学学报 ›› 2013, Vol. 43 ›› Issue (11): 907-921.DOI: 10.3969/j.issn.0253-2778.2013.11.006

• 原创论文 • 上一篇    下一篇

用压缩感知方法研究大地震的破裂过程 ——方法与研究进展

姚华建   

  1. 1.中国科学技术大学地球和空间科学学院地震与地球内部物理实验室,安徽合肥 230026; 2.蒙城地球物理国家野外科学观测研究站,安徽蒙城 233500
  • 收稿日期:2013-10-11 修回日期:2013-10-25 出版日期:2013-11-30 发布日期:2013-11-30
  • 作者简介:姚华建,1979年生,中国科学技术大学教授、博士生导师.分别于2001和2004年获得中国科学技术大学固体地球物理专业学士和硕士学位,2009年获得麻省理工学院地球物理学博士学位,之后分别在麻省理工学院地球资源实验室和加州大学圣地亚哥分校斯克里普斯海洋研究所从事博士后研究.2011年入选中组部首批“青年千人计划”,并于2011年底回中国科学技术大学任教,2012年获得国家自然科学基金委首批“优秀青年科学基金”资助.主要从事地震学和地球物理学方面的基础研究和应用,在背景噪声和面波成像、青藏高原岩石圈结构和形变及大地震破裂过程成像等领域取得了一系列国际性的研究成果,在PNAS,JGR,GRL,GJI,PEPI等国际学术期刊发表论文20余篇,其中2006年在GJI发表的噪声成像论文已成为国际上该领域被引用次数最多的论文之一,多次在AGU年会及其他国际学术会议上作邀请报告。2013年被教育部聘为高等学校地球物理学类专业教学指导委员会秘书长,现担任美国地震协会国际学术期刊Seismological Research Letters的副主编。E-mail: hjyao@ustc.edu.cn
  • 基金资助:
    国家自然科学基金(41374055),中国科学院创新团队项目资助.

Compressive sensing of great earthquake rupture process: Methodology and research advances

YAO Huajian   

  1. 1.Laboratory of Seismology and Physics of Earths Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; 2.Mengcheng National Geophysical Observatory, Mengcheng 233500, China
  • Received:2013-10-11 Revised:2013-10-25 Online:2013-11-30 Published:2013-11-30

摘要: 通过观测方法来研究大地震的破裂过程是认识地震破裂物理规律最重要的手段之一.本文较为详细地介绍了基于稀疏反演理论的压缩感知方法及其在研究大地震破裂过程中不同频率能量释放的时空分布中的应用,着重介绍了采用压缩感知算法所获得的俯冲带特大逆冲型地震与频率及深度相关的能量释放过程,并讨论了该过程与随深度变化的同震断层滑移量和早期余震分布之间的关系.这为认识俯冲板块表面随深度变化的摩擦性质和俯冲带大地震的破裂规律提供了重要的观测结果.最后本文讨论了通过观测手段研究大地震破裂过程的现状和未来,并展望了压缩感知算法在研究地震破裂能量释放及其他地震学和地球物理学领域中的应用.

关键词: 地震破裂过程, 压缩感知算法, 地震能量释放, 俯冲带逆冲大地震

Abstract: The use of observational methods to investigate great earthquake rupture processes has been one of the most important tools to study earthquake rupture physics. This review article gave a fairly detailed description about the compressive sensing technique, a method based on sparse inverse theory, and its application in studying the spatial and temporal distribution of seismic radiation at different frequencies during great earthquake ruptures. In particular, the main results about the frequency- and depth-dependent seismic radiation during rupture processes of subduction zone megathrust earthquakes that were revealed by the compressive sensing technique were reviewed as well as its correlation with depth-dependent co-seismic slip and early aftershocks distribution. These may provide important observational results for understanding the frictional properties of the subducting slab interface and rupture mechanisms of subduction zone great earthquakes. Finally, the current status and future directions on studying earthquake rupture process using observational methods were discussed. Some perspective researches about the use of the compressive sensing technique for studying seismic radiation during earthquake ruptures were also discussed as well as its application in some other fields in seismology and geophysics.

Key words: earthquake rupture process, compressive sensing, seismic radiation, subduction zone megathrust earthquake