Zhao Lin An Meijian Shen Xuzhang Dai Guanghui Tian Jianxiong. 2011: Analysis on background weak seismic signals in Yunnan, China. Acta Seismologica Sinica, 33(6): 723-734.
Citation: Zhao Lin An Meijian Shen Xuzhang Dai Guanghui Tian Jianxiong. 2011: Analysis on background weak seismic signals in Yunnan, China. Acta Seismologica Sinica, 33(6): 723-734.

Analysis on background weak seismic signals in Yunnan, China

  • Using 9 months waveform data recorded at 44 seismic stations of Yunnan seismic network during 2008, we obtained Greenrsquo;s functions between the stations with cross-correlation analysis, and then retrieved wave dispersion curves from the Greenrsquo;s functions. Using the Greenrsquo;s functions and dispersion curves, we analyzed the sources of the regional background weak signals. The Greenrsquo;s functions show that the background weak signals in a period of 15s propagated from southeast to northwest in the Yunnan province. The azimuthal variation of the signals implies that they may be related to the effect of oceanic waves in South China Sea or southern Pacific ocean. The background signals show a seasonal variation, with the strongest signals appeared between June and September in a year. Comparing the signals with wind data, we could not find any relation between them.
  • loading

Catalog

    Turn off MathJax
    Article Contents

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return