宝立・立山・須坂観測室の地殻変動観測テレメータ・システム

Abstract

In order to investigate crustal deformations being concerned with earthquake activities in thenorthern part of the Chubu districts, Three observation stations, Horyu (Ishikawa Pref.), Tateyama (Toyama Pref.) and Suzaka (Nagano Pref.) were constructed. The main instrumentsset in the observation vaults are water-tube tiltmeters and strainmeters. Both of these instru-ments use differential transformers for their detectors.Twenty signals of crustal strains and tilts and some other geophysical data, and three signals ofseismic waves observed at Horyu are telemetered to the Kamitakara Observatory by an exclusivetelephone line with the signalling rate of 4800 bps.In the case of Tateyama or Suzaka, data measuring interval is ten minutes. Signals of crus-tal movements and other data are stored on RAM cassette in a digital data logger and collectedautomatically once a day at the Kamitakara Observatory by a public telephone line (1200 bps).All the data are stored in hard disk units and used for data processing