| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
To clarify seismic vibration characteristics reached to landslide mass, we monitored seismic ground motion in a landslide site of Niigata Prefecture, Japan. Strong-motion seismographs were installed in the landslide mass and outside of it. Landslide mass is formed by strong weathered mudstone and tuff. Two analyzable earthquakes (Mj3.0 and 6.7) were observed in the site. Maximum seismic acceleration and maximum velocity in the landslide were stronger than out of the landslide. It showed the seismic vibration increased on the landslide mass. As the result of Fourier analysis, we found the vibration with approximately 1Hz was amplified on the landslide mass. We considered the amplification as the reason that the seismic vibration increased in the landslide.
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