Travel Time Analysis of Relatively Deep Earthquakes in Southwest Japan with Special Reference to the Underthrusting of the Philippine Sea Plate

Abstract

Near Southwest Japan, the oceanic Philippine Sea plate moves northwestwards relative to the continental China plate at a rate of about 8 cm/year (F_ITCH & S_HOLZ, 1971; K_ANAMORI, 1972). The manner of plate convergence in Southwest Japan somewhat differs from the case of other typical island arc-trench systems....