Fig. 5

Estimated coseismic slip distribution of the 2011 Tohoku-Oki sequence. Figures show the results for the mainshock (a), the Iwate-Oki EQ (b), and the Ibaraki-Oki EQ (c). The figure presents differences between the average of slip time series before and after the event origin (05:41–05:46 and 05:51–05:56 for the mainshock, 06:13–06:15 and 06:20–06:22 for the Ibaraki-Oki, and 06:06–06:08 and 06:13–06:15 for the Iwate-Oki, respectively). Black arrows represent the coseismic fault slip direction and norm. The slip amount of each subfault is indicated by the color gradation; darker colors denote more significant slip amounts. We excluded slip values that were smaller than their standard deviations estimated during Kalman filtering. The subfault was masked by gray when both components ranged below the standard deviation. The black stars represent the epicenters of the three earthquakes. The black dotted rectangle in (b, c) indicates the region of magnitude calculation. Please note that the scale of arrows and color differ for each figure. We also show the fault models estimated by Nishimura et al. (2011) by blue rectangles in (b, c)