Fig. 3

Results for the 2019 Yamagata-Oki earthquake. a Posterior PDFs. The ranges on the horizontal axis reflect the maximum search ranges. Inserted values in the upper right-hand corner denote the mean, median, and mode in the top middle, and bottom positions, respectively. b Estimated coseismic fault model. The black and white vectors denote the observations and calculations based on the coseismic fault model, respectively. The colors indicate the residual value between the calculation and observation of the vertical component. Focal mechanisms, in gray and black, represent the initial value for the analysis and the CMT solution issued by the JMA, respectively. The red rectangular fault model represents the estimated coseismic fault model (median value). The black rectangular fault model represents the estimated coseismic fault model with the REGARD system. c Marginal PDFs of strike, rake, and dip angles. The colors indicate the normalized frequency. d Normalized frequency distribution of the estimated coseismic fault. The colors indicate the normalized frequency of the coseismic fault plane at each point