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地震 ›› 2005, Vol. 25 ›› Issue (4): 39-48.

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尾波Qc值随时间变化在地震预测中应用的研究

马宏生1,2, 刘杰2, 张国民2, 王伟君2   

  1. 1.中国地震局地球物理研究所, 北京 100081;
    2.中国地震局地震预测研究所, 北京 100036
  • 收稿日期:2005-03-22 修回日期:2005-05-17 出版日期:2005-10-31 发布日期:2021-11-10
  • 作者简介:马宏生(1976-), 男, 新疆和静人, 2004年在读博士研究生, 主要从事强震机理和地震预测研究。
  • 基金资助:
    科技部社会公益项目(2004DIA3J010); 国家重大基础研究前期研究专项(2002CCD01700); 中国地震局地震预测所青年基金(QN200401); 中国地震局地球物理研究所论著05AC1022

Research of temporal change of Coda Qc applied in earthquake prediction

MA Hong-sheng1,2, LIU Jie2, ZHANG Guo-min2, WANG Wei-jun2   

  1. 1. Institute of Geophysics, CEA, Beijing 100081;
    2. Institute of Earthquake Science, CEA, Beijing 100036, China
  • Received:2005-03-22 Revised:2005-05-17 Online:2005-10-31 Published:2021-11-10

摘要: 利用云南地区22个区域数字地震台站记录到的, 自1999年下半年至2004年下半年的1403条数字地震波形资料, 采用Sato单次散射模型, 计算了各台站周围50 km内的尾波Qc值; 并给出了其中14个资料相对较为丰富的台站的尾波Qc值随时间变化结果。 依据这14个台的3 Hz、 10 Hz、 18 Hz频率点的2002年1月1日前后平均Qc值的变化, 研究认为在未来几年内, 云南地区比较危险的区域可能位于滇中块体的东南边界附近、 滇中块体的西南部及其西边界附近。

关键词: 尾波Qc值, Sato单次散射模型, 时间变化特征, 地震预测

Abstract: The coda-wave attenuation quality factor Qc values in the periphery areas of seismic stations in Yunnan Province were estimated using the single-scattering attenuation model of Sato from 1403 local seismic events recorded by a regional network of 22 digital stations from the latter half of 1999 to the latter half of 2004. And temporal changes of coda Qc of 14 stations with relative richer data were given out. Based on the temporal changes of average coda Qc at 3 Hz, 10 Hz, and 18 Hz at these 14 stations around January 1, 2002, the risky areas were predicted in the vicinity of the southeastern boundary and the southwestern as well as the western boundary of Dianzhong Active-tectonic Block.

Key words: Coda Qc, Sato′s single-scattering attenuation model, Temporal changes, Earthquake prediction

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