地殻傾斜観測資料集(4)1981 : 近又・野田沢・岡部・中伊豆・南足柄・塩山・岩井北・銚子・三ヶ日・静岡・府中地殻活動観測施設

概要

論文の詳細を見る
The National Research Center for Disaster Prevention is conducting crustal tilt observation in the Kanto-Tokai area by using the borehole-type tiltmeter. The tiltmeter is installed at the bottom of the observation well. The output voltage, which is proportional to the ground tilting, is transmitted to the Research Center at Tsukuba, Ibaraki Prefecture, by the telemetory system and recorded on magnetic tapes by a digital data recorder. In 1981, observation was started at three new stations in addition to the eight stations where stationary observation had been carried out since 1978. We report changes of the crustal tilt at the eleven stations during 1981. The results are illustrated in two different types of diagrams : monthly diagrams(Fig.5) where tilt data are plotted every hour, and annual diagrams(Fig.4) where daily mean of tilt is plotted in order to show gross features of tilt changes.
1982-11-30