Fig. 4

Spatial distribution of calculated strain. Squares and circles indicate the calculated strain change due to a uniform slip of a rectangular fault of Models a 5, b 6, c 23, d 24, and e 35, indicated by a blue rectangle. Locations in which calculated strain change have the same features of the observed strain data, i.e., the contraction in NS, extension in EW, and the absolute value of strain change in NS is larger than that in EW, are shown by circles. Blue arrows indicate the slip vector