著者

和達 清夫

出版者

東京帝国大学地震研究所

雑誌

東京帝國大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, Tokyo Imperial University (ISSN:00408972)

巻号頁・発行日

vol.1, pp.55-58, 1926-10-15

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The pulsatory oscillations were observed at the seismologica observatory at Hommaru, Tokyo from Dec. 1st. 1925 to Jan. 21st. 1926. The Galitzin seismograph with photographic registration was used for the purpose. The pulsations observed at Tokyo may be classified into three sorts according to their periods: (A) those with a period shorter than 3 sec. (B) regular type with a period of 4-8 sec. and (C) irregular type with a period of more than 30 sec.