局所地震の入射角と震央距離との関係について

Abstract

The particle motions of seismic waves obtained from the short period observational systemand the system of automated analysis at the Amagase Crustal Movement Observatory are analyzedto examine the relation of the angles of incidence of P waves from both quarry blasts and localsmall earthquakes to the epicentral distances. The velocity of the surface lyaer of the local crustand the accuracy of hypocentral determination of local earthquakes are discussed.