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A single-station coda solution for source, attenuation and site factors

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Acta Seismologica Sinica

Abstract

Based on the empirical formulation formed from coda observations, the digital waveforms from 33 local events with magnitude M L ranging between 2.1 and 3.5, recorded at Changli station of Beijing Telemetered Seismographic Network from 1989 to 1991, are used to compute coda Q for the Changli region and the source factors of all earthquakes by single-station coda method. Furthermore, assuming a certain source model, we have obtained the station site frequency response and source spectra, as well as source parameters such as corner frequencies, seismic moments and stress drops and so on. Their variations with time are monitored before and after larger earthquakes. Because the coda method can more effectively reduce the influence of source radiation pattern and a particular propagation path than direct wave method, more data can be used and more accurate results can be obtained, which provided a possible approach to study the source properties and reveal the variation of source parameters before larger earthquakes.

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Authors and Affiliations

  1. Institute of Geophysics, State Seismological Bureau, 100081, Beijing, China

    Tian-Zhong Zhang, Yun-Sheng Ma & Rong-Liang Huang

Authors
  1. Tian-Zhong Zhang
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  2. Yun-Sheng Ma
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  3. Rong-Liang Huang
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Additional information

Contribution No. 97A0107, Institute of Geophysics, SSB, China.

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Zhang, TZ., Ma, YS. & Huang, RL. A single-station coda solution for source, attenuation and site factors. Acta Seimol. Sin. 11, 163–170 (1998). https://doi.org/10.1007/s11589-998-0053-3

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  • DOI: https://doi.org/10.1007/s11589-998-0053-3

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