Investigation of the Structure of the Earth's Crust in Relation to Local Earthquakes (Preliminary) (Study on Some Phenomena Foretelling the Occurrence of Destructive Earthquakes)

Abstract

Preliminary observations of local earthquakes of frequent occurrence in the Wakayama District were made with a vertical seismograph of short period and high magnification. It was confirmed by the reflected seismic wave that there exist some distinct surfaces of discontinuity in the earth's crust in the Wakayama District.