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タイトル: | OBSERVATION OF THE EARTH TIDAL EXTENSION AT WALFERDANGE |
著者: | OZAWA, Izuo MELCHIOR, Paul DUCARME, Bernard FLICK, Jean |
発行日: | Dec-1973 |
出版者: | Geophysical Institute, Kyoto University |
誌名: | Contributions of the Geophysical Institute, Kyoto University |
巻: | 13 |
開始ページ: | 85 |
終了ページ: | 92 |
抄録: | An observation of the earth tidal extension by means of extensometer which has been devised By I. Ozawa has been carried out in a gypsum mine at Walferdange, Luxemburg. The observation was begun in November, 1970. The sensitivity of the observation was in the range between 0.45 X 10^- 9 /mm and 0.61 X 10^-9/mm. The harmonic analyses have four periods whose lengths are from 30 days to 60 days. According to these analyses, the amplitude of M_2 wave and O_1 wave are (0.72-1.84) X 10^-8 and (0.43-1.07) X 10^-8, respectively. The sensitivity of the extensometer has been measured automatically with the carpaudin every other days. The differences of the phase lags between M_2 wave's KM_2 and O_1 wave's KO_1 is given as KM_2-KO_1 =41.2°-43.4° The amplitude ratio O_1/M_2 of the O_1 wave's to M2 wave's are given as 0.433~0.777. From these result, we have the ratio l/h between Shida's number and Love's one is given as 0.114±0.007. The probable values of these numbers is obtained as h= 0.75±0.06 and l=0.10±0.02. These results give the possibility that the values of Love's and the Shida's numbers are obtained directly by means of this observation far distant from the sea. |
URI: | http://hdl.handle.net/2433/178633 |
出現コレクション: | No.13 |

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