MOESM4 of Upper boundaries of the Pacific and Philippine Sea plates near the triple junction off the Boso Peninsula deduced from ocean-bottom seismic observations

Additional file 4: Figure A4. Comparison of earthquakes. (a) Hypocenter distributions. Black and gray dots indicate hypocenters reported in this study and by F-net, respectively. Identical earthquakes are connected with black lines. (b) Focal mechanisms in map view in lower-hemisphere projections. Beach balls correspond to F-net, this study, and Global CMT. Event numbers correspond to (a). (c) Focal mechanisms with the distribution of polarities. Event number corresponds to (a) and (b).