The first absolute gravity measurements in Indonesia |
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| Authors: | Yoichi Fukuda Toshihiro Higashi Shuzo Takemoto Maiko Abe Sjafra Dwipa Dendi Surya Kusuma Achmad Andan Koichiro Doi Yuichi Imanishi Giuseppe Arduino |
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| Institution: | aDepartment of Geophysics, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan;bHead of Geothermal Division, Directorate of Mineral Resources Inventory, Bandung, Indonesia;cNational Institute of Polar Research, Tokyo 173-8515, Japan;dOcean Research Institute, The University of Tokyo, Tokyo 164-8639, Japan;eUNESCO Office, Kebayoran Baru, Jakarta 12110, Indonesia |
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| Abstract: | For the purposes of the calibration of the superconducting gravimeter (SG) in Bandung and the establishment of the absolute gravity (AG) points, we carried out AG measurements for the first time in Indonesia in November 2002. The measurements in Bandung were conducted between November 15th and 20th by means of a FG5 (#210), and 14,520 effective drops were obtained. The gravity value newly determined at the AG point in Bandung is 977976701.2 μgal (1 μgal = 10−8 ms−2) and the scale factor for the SG is −52.22 μgal/V. We also established another AG point in Yogyakarta near Merapi volcano and carried out AG measurements in Yogyakarta between November 22nd and 26th. The gravity value determined for this station is 978203093.5 μgal. |
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