Registration of tsunamis in the open ocean

摘要

The small tsunami of February 23, 1980, which originated near the southern part of the Kuril Islands was recorded by the bottom vibrotron sensor installed on the shelf near Shikotan Island and connected to the island observatory by underwater cable. The marigram of the tsunami is given and compared with marigrams obtained at shore tide gauges. Some spectral features of the records are discussed.