Fig. 7

Snapshots of the estimated slip increase after the mainshock. These are moving averages of the estimated slip time series using a time window of 5 min with a step of 30 s. The figures display every 5 min after the first “reset” and final result. All figures display differences between the first moving average (05:51–05:56). Please note that we excluded the slip in time around the Iwate-Oki EQ and the Ibaraki-Oki EQ for the northern and southern part of the fault zone, as indicated by the blue dotted line. Black outlines in each figure represent subfaults whose slip exceeds its estimated uncertainty. We also show mainshock slip estimated by PTS with blue contours. Refer to Additional file 1: Animation S1 for the full animation