抄録
The base-line networks for repeatable surveys with a Geodimeter VI (No. 6485) were constructed in Inuyama area for detecting tectonic movements. The structures of the base-line networks, their combination set for surveys and observational accuracy are discussed. The surveys were conducted three times, the results of which show the principal strain similar to that resulting from the observations by continuous recording system for detecting Crustal movements. The principal strain was found to be +(6-9)×10-6 in the direction of N 125°-130° W and - (12-20)×10-6 in the direction of N 35°-40° W during the period from August 1967 to May 1968. The principal stress inferred from the occurrence mechanisms of small shocks which were observed in Inuyama area has a tendency of coincidence with that inferred from the extension and contraction of the principal strains above mentioned.
