@article{oai:nagano-nct.repo.nii.ac.jp:00000656,
 author = {服部, 秀人 and 国井, 隆弘},
 journal = {長野工業高等専門学校紀要},
 month = {Dec},
 note = {application, The observations of microtremors were carried out at 55 spots within 2.75km along the levee of the Chikuma-river in the Nagano-basin. Microtremors were obse-rved simultaneously on the top and the toe of the slope of the levee. From the spectrum ratio of microtremors at the top and the toe of the slope, it was confirmed, at many observation spots, that the levee is in a state of plane strain. So, based on the spectrum ratio, the rigidity of the levee was tried to esti-mate by using the Frequency Response Function which was calculated by the Finite Element Method. And it was resumed that the former river channel exists under the spots of the levee, considering the characteristics of amplitude and predominant frequency of microtremors and the information of old map of the area.},
 pages = {89--96},
 title = {長野盆地の提防の常時微動について},
 volume = {19},
 year = {1988}
}