Identification of Large-Scale Dissected Landslides and Verification Through Microtremor Analysis Along the Median Tectonic Line in East Shikoku, Japan
DOI:
https://doi.org/10.64862/ajeg.2025.2sp.84.217Keywords:
Dissected landslide, DEM, MicrotremorAbstract
It is difficult to recognize the existence of rock bodies whose landslide topography has been completely dissected. We have identified large-scale dissected landslide bodies along the Median Tectonic Line, Japan, by recognizing characteristic topographic features of landslides on a digital elevation model. We have proposed that H/V spectra obtained by microtremor surveys are an effective means of distinguishing a landslide body from a stable, sound rock-mass in the field.
References
Hasegawa, S. (1992). Large-scale rock slides and Quaternary faulting along the Median Tectonic Line on the southern foot of the Sanuki Range in Shikoku, Southwest Japan. The Memoirs of the Geological Society of Japan, 40, 143–170.
Kanbara, D., Hasegawa, S., Nonomura, A., Chiba, T., and Kimura, M. (2021). New index for identifying large-scale dissected landslides along the Median Tectonic Line. Journal of the Japan Society of Engineering Geology, 62(5), 296–307. https://doi.org/10.5110/jjseg.62.296
Hasegawa, S., Nonomura, A., and Khanal, R. K. (2016). Analysis of the distribution of landslides triggered by the 2015 Nepal–Gorkha earthquake. Proceedings of the Shikoku Branch Research Presentation Meeting of the Japanese Geotechnical Society, 71–72.
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