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

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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

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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