公衆回線テレメータを用いた琵琶湖周辺地域での高精度地震観測システムについて

Abstract

We have newly developed a public-line telemetry system, which is composed of transmitters and a data acquisition system.The transmitters at seismic stations store waveform data of triggered events. The data acquisition system at DPRI, Kyoto Univ., once a day, gathers trigger information from all the stations, and discriminates seismic data from noise-triggered ones by comparing the trigger time among neighboring stations.After this, only the seismic wave data are transmitted to DPRI from each station.We have installed ten temporary stations around Lake Biwa region by using the telemetry system stated above. Following analyses will be done in this region: detailed seismic activity, 3-Din-homogeneous structure of P-wave velocity and of coda scatterers in the crust, depth distribution of earthquakes, and focal mechanism by waveform inversion.