掲載雑誌（和）： 日本地震工学シンポジウム論文集 Vol： 9-3巻 年： 1994年 頁： E.67-E.72頁 著者（和）： - タイトル（和）： - 抄録（和）：
- キーワード（和）： - 掲載雑誌（英）： PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM 著者（英）： Hao Xian-Sheng, Kenji HAGIO, Toshiro MAEDA, Hiroshi HIBINO, Reiko YAMANAKA タイトル（英）： A SITE RESPONSE ESTIMATION IN KUSHIRO CITY BASED ON A COMPARISON BETWEEN MICROTREMORS AND WEAK-MOTION 抄録（英）：
After the 1993 Kushiro-Oki Earthquake(M=7.8), microtremor measurements were conducted in Kushiro city, Hokkaido, Japan. During the measurement, a weak ground motion caused by an earthquake happened to be recorded. In this paper, Fourier spectral ratio has been used to compare the characteristics of the microtremors to those of the weak motion induced by the earthquake. Fourier spectral characteristics of the microtremors, recorded in a six day period, are very similar with those of the weak-motion, indicating that the behavior is independent of the excitation characteristics, that is rather strongly related to the local geological structure. More specifically, spectral ratio characteristics of S waves and surface waves were found very similar, while those of P waves were different between the microtremors and the weak-motion. This might suggest that, in the range of periods between 0.1 to 10 seconds, microtremors are mainly composed of shear waves and surface waves. Finally, distribution of the predominant periods in Kushiro city was estimated by the spectral ratio method. キーワード（英）： - 記事区分： - 区分 　　　委員会論文集