Detection of Landslide Layer Thickness using Single Microtremor Survey
DOI:
https://doi.org/10.64862/Keywords:
Landslide, Microtremor, S-wave velocityAbstract
Landslide topography can be interpreted from topographic maps, but it is generally difficult to determine the depth of a landslide, and the application of geophysical surveys is desirable. In this study, single microtremor investigations were carried out at some locations on the outside and inside of landslide terrain identified from ridge interruptions using red relief image maps. As a result of this study, it was found that the peak frequency of the H/V spectrum is lower on the inside of landslide area, and that the depth of the surface layer obtained from the theoretical dispersion curve corresponding to this peak frequency is greater inside the landslide area.
References
Inagaki, H., Ookubo, T., Hasegawa, S., and Yatabe, R. (2005). Stability of old landslide. Tsuchi to Kiso, 53 (7), 17–19. (in Japanese).
Kanbara, D., Hasegawa, S., Nonomura, A., Chiba, T., and Kimura, M. (2021). New index for identifying large-scale dissected landslide along the Median Tectonic Line. Journal of the Japan Society of Engineering Geology, 62 (5), 296–307. (in Japanese with English abstract).
Ooku, M., Tsuyuguchi, K., Aono, S., Hasegawa, S., Yamanaka, M., Araki, H., Chimoto, K., Nonomura, A., Ikeda, T., and Nagata, T. (2025). A case study of microtremor exploration in a plane and landslide area in Shikoku. Proceedings of the SEGJ Conference, 152, 57–59. The Society of Exploration Geophysicists of Japan. (in Japanese).
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