Some Problems of Seismic Data Processing. Part 3. Particle Motion Analysis of Local Earthquake Waves and the Underground Structure beneath Recording Sites

Abstract

The ground particle motions of seismic waves obtained from the short-period observational system and the system of automated analysis, which has been successfully employed at the Amagase station as described in previous papers, are analyzed to examine the accuracy of informations and the relation to the local crustal structures. The angles of incidence of P and SV waves and the direction of particle motion of P wave in the horizontal plane are discussed on the basis of data from both quarry blasts and local earthquakes with known epicenters.