On the Digital Observation of Crustal Deformation by Means of Extensometers with Photoelectric Recorder

概要

論文の詳細を見る
The Donzurubo Crustal Movement Observatory was established for the purpose of studying the crustal deformation and the prediction of earthquakes in 1967, and the continuous observation of ground-strain and -tilt has been carried out by the superinvar bar and superinvar wire extensometers, horizontal pendulum tiltmeters and the watertube tiltmeters. Furthermore, for the purpose of obtaining the telemetric digital record of crustal deformations, a new recording system was devised and applied to the silica-tube extensometers. This system was made up of crystal clock, scanner, photoelectric transmitter, digital counter and digital printer. Comparing with the usual photographic records, the records with the same accuracy were obtained. As an example of observed results, analysis of two tidal components (M2 and 01) were made from records during 45 days.
日本測地学会の論文