著者

益川 敏雄 表 俊一郎 久保寺 章 三浪 俊夫

出版者

日本地熱学会

雑誌

日本地熱学会誌 (ISSN:03886735)

巻号頁・発行日

vol.1, no.1, pp.3-14, 1979-06-30 (Released:2009-08-07)

参考文献数

5

被引用文献数

1

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Recently, the Hatchobaru geothermal electric power station of Kyushu Electric Power Co. started its commertial operation on June 1977, under the prescribed power of 50, 000KW. In prior to the completion of the full scale Hatchobaru Power Station, a geothermal power station had been operated since August 1963 at Ohtake, about 2 km distant from the new station to the north. Together with the increase in the development of power production it was planned to improve the micro-earthquake observation network. A new network is composed by one base station and 6 branch stations distributed within an area of 20×20km, in which the Hatchobaru station is acting as the base station locating nearly in the center of the other stations. Each branch station is equipped with one vertical seismometer and is connected to the base station by telephone lines. In the base station all neccesarry devices for micro-earthquake observations are prepared including memory unit, trigger unit, amplifying unit, for-each respective station and a cloock system as well as a recording system. The recording system in Hatchobaru base station is so arranged that the six seismograms of all the seismic stations could be reproduced on one sheet of paper side by side. In doing so reading of seismograms and locating of epicenters could be realized most easily with high acculacy. In this report there are described the newly developed telemeter system for observing the micro-earthquakes in the Hatchobaru geothermal area, together with the some results obtained in the course of the first 8 months test run. These results fairly a satisfactory operation.