Abstract

AbstractA large number of distributed surface ruptures associated with the mainshock of the 2016 Kumamoto earthquake sequence appeared apart from the primary surface ruptures. In the northeastern part of the inner Aso caldera, small displacements were detected as the discontinuities of fringes in InSAR images. This chapter reports the result of the field examination of these discontinuities. We found two surface rupture traces with northeast-southwest strikes and measured vertical and right-lateral offsets on the both ruptures based on the damaged paved roads and offset of block walls.KeywordsDistributed surface rupturesAso calderaInSARRight-lateral offset

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