Site Amplification Variation of Irregularly Layered Media in the Cold Region

To evaluate the effects of seasonal variation in the irregularly layered media due to the freezing in the cold region, we carried out continuous seismic observations, including a shallow borehole and weight-drop measurement at a site with a soft change of soil materials in Kitami City.

In this paper, we reported the outline of the observations and measurements, and we showed the results of initial analysis by weight-drop excitation data in a linear array and borehole seismic observation data.