地殻傾斜観測資料集(2)1979 : 近又・野田沢・岡部・中伊豆・南足柄・塩山地殻活動観測施設

概要

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The National Research Canter for Disaster Prevention is conducting crustal tilt observation in the Kanto-Tokai area by using the borehole-type tiltmeters. The tiltmeter is installed at the bottom of each observation well. The output voltage, which is proportional to the ground tilting, is transmitted to the National Research Center for Disaster Prevention at Tsukuba, Ibaraki Prefecture by the telemetry system and recorded on magnetic tapes by a digital recorder. In 1979, observation is newly started at three stations in addition to the three stations of which the stationary observation has been carried out since 1978. We report changes of the crustal tilt at the six stations during 1979. The results are illustrated in two types of figures : a monthly figure where tilt data are plotted every one hour, and an annual figure where daily means are plotted in order to show gross features of the tilt change.
1980-06-30