A Temporary Observation of Microearthquakes in the Vicinity of the Kii Channel, Japan, in 1973. (Preliminary Report)

紀伊水道の微小地震活動予備調査のため,1973年7月から12月まで紀伊水道近傍で臨時観測を行った.この観測は和歌山微小地震観測所のRoutine観測から得られている紀伊水道の地震活動の推定されるPatternの吟味と,分布の詳細(特に深さについて),地殻構造,発生機構等の課題に対する予備的調査が主目的である.In order to study the seismic activity of microearthquakes in the Kii Channel, a temporary observation was carried out in 1973 from July to December. A large number of seismograms was obtained, but a part of them (from July to September) has been interpreted. Till now some results were found as pointed out in the followings. 1) Ordinary seismic activity continues in the vicinity of the Kil Channel