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Fig. 7 | Earth, Planets and Space

Fig. 7

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. 7

Distribution of focal mechanisms of low-angle thrust-faulting earthquakes in a, b, c and d. Black beach balls show PAC group earthquakes. Light blue and yellow-green beach balls show shallow group earthquakes, which are detailed in e. Lines CC′ and DD′ define the projected line onto cross sections parallel to the subduction directions of the PAC and the PHS, respectively. Red crosses in c and d indicate the location of the PHS–NA boundary determined by Nakahigashi et al. (2012). Red lines in d show the connected upper boundary of the PHS in the trenchward and landward area

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