MOESM1 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 1: Figure A1. Distribution of average observed and calculated travel times (O–C times) used for station corrections in hypocenter locations; (a) and (b) are average O–C times for P- and S-waves, respectively, assuming a one-dimensional structure, whereas (c) and (d) are those assuming a three-dimensional structure. Circles with orange outer rims show broadband ocean-bottom seismometer (BBOBS) locations. The root-mean-squares (RMS) of station corrections for P- and S-waves assuming a one-dimensional structure are 0.44 s (a) and 2.12 s (b), respectively. The RMS of station corrections for P- and S-waves assuming a three-dimensional structure are 0.43 s (c) and 1.88 s (d), respectively.