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Earth, Planets and Space
Fig. 6 | Earth, Planets and Space

Fig. 6

From: Upper boundaries of the Pacific and Philippine Sea plates near the triple junction off the Boso Peninsula deduced from ocean-bottom seismic observations

Fig. 6

Comparison of hypocenters (a, b) and focal mechanisms (c) of this study with a previous crustal model. Line B–B′ shows the location of the refraction survey conducted by Nakahigashi et al. (2012), nearly perpendicular to the subduction direction of the PAC. Light gray dots show hypocenters based on the three-dimensional velocity model (Fig. 3b). Dark gray dots indicate the hypocenters of earthquakes within a 20-km-wide box on both sides of the B–B′ profile

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