@article{oai:shinshu.repo.nii.ac.jp:00018756,
 author = {服部, 秀人 and 国井, 隆弘 and 島, 坦},
 journal = {長野工業高等専門学校紀要},
 month = {Dec},
 note = {The observations of microtremors were made in the Nagano-basin, where 192 locations were taken at the mesh of intervals of about 1 km. Wave motions in NS, EW, and UD components were compared between records due to the period of 2 sec. and 10 sec. seismometers. Particle orbits of surface motion were depicted from NS and EW components of microtremors. The predominant movement showing the directivity of the northeast-southwest or the northwest-southeast was rather clear in long period records than short period records. It seems to be attrilbuted to the underground structure in the Nagano-basin., application},
 pages = {39--45},
 title = {長野盆地の地盤構造と常時微動の方向性について},
 volume = {24},
 year = {1991}
}