Application of active and passive surface wave methods to landslide areas
DOI:
https://doi.org/10.64862/Keywords:
Landslide, Surface wave method, S-wave velocity, Horizontal-to-vertical spectral ratioAbstract
We applied the surface wave methods to many landslide areas to evaluate the applicability of the methods to the mountainous region. We usually carry out MASW, MAM and single station three-component (3C) microtremor measurements. Five to ten single (vertical) component and one 3C velocity sensors were deployed with 2 to 10 m spacing intervals. We usually use a 10 kg sledge hammer for MASW and recorded about 30 minutes of ambient noise for MAM processing and horizontal-to-vertical spectral ratio. A joint inversion estimated 1D Vs profiles to generally 30 m deep at each site. The results from various investigation sites confirmed that the active and passive surface wave methods provided reliable dispersion curves and successfully estimated Vs profiles to several tens of meters deep in the landslide areas.
References
CAO, Japanese Government (2017). Available at: https://www.geospatial.jp/ckan/dataset/1213.
Hayashi, K., Asten, M.W., Stephenson, W.J., Cornou, C., Hobiger, M., Pilz, M., and Yamanaka, H. (2022). Microtremor array method using spatial autocorrelation analysis of Rayleigh-wave data. Journal of Seismology.
Park, C.B., Miller, D.M., and Xia, J. (1999). Multichannel Analysis of surface waves. Geophysics, 64, No.3: 800-808.
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