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Dai K S，Wang S Q，Liu K，You Q Y. 2022. The nearest offset distance estimation method for multi-channel analysis of surface waves in slope. Acta Seismologica Sinica，44（2）：327−338. DOI: 10.11939/jass.20210098
Citation: Dai K S，Wang S Q，Liu K，You Q Y. 2022. The nearest offset distance estimation method for multi-channel analysis of surface waves in slope. Acta Seismologica Sinica，44（2）：327−338. DOI: 10.11939/jass.20210098
shu

The nearest offset distance estimation method for multi-channel analysis of surface waves in slope

  • 1.

    Institute for Disaster Management and Reconstruction，Sichuan University，Chengdu 610065，China

  • 2.

    Project Management Office of China National Scientific Seafloor Observatory，Tongji University，Shanghai 200092，China

  • 3.

    State Key Laboratory of Marine Geology，Tongji University，Shanghai 200092，China

  • 4.

    Shanghai Sheshan National Geophysical Observatory，Shanghai Earthquake Agency，Shanghai 200062，China

  • 5.

    Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029，China

  • 6.

    Key Laboratory of Petroleum Resources Research，Chinese Academy of Sciences，Beijing 100029，China

More Information
  • Received Date: June 03, 2021
  • Revised Date: July 12, 2021
  • Available Online: March 24, 2022
  • Published Date: April 23, 2022
    Graphical Abstract
    • Abstract
  • In order to reduce the interference of energetic near-field body waves to surface wave identification and to ensure Rayleigh wave components with strong energy to be collected by multi-channel analysis of surface waves （MASW） method in the slope, this study firstly analyzed the Rayleigh wave propagation mechanism induced by the underground passive source on the slope. Secondly, based on geometric seismology, an empirical formula for the minimum offset of the Rayleigh wave generated on the sloping surface is proposed, and the layered slope with undulating interface is established so as to obtain the simulated common shot point records. Then by comparing the surface particle motion trajectory and dispersion calculation results obtained from the common shot point records with the theoretical values and estimated values, the results show that the four physical quantities have a strong correlation, which indicates that the proposed minimum offset estimation method in this study can be adopted to guide surface wave exploration of layered slopes.
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    • References (38)
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