Abstract
This chapter describes the characteristics of the ~24-km-long surface ruptures along the central–northern part of the Futagawa fault during the mainshock of the 2016 Kumamoto earthquake sequence. The rupture appeared from Kiyama in Mashiki Town westward through Nishihara Village, and extended into the Aso caldera up to Kurokawa in Minami-Aso Village. We report the locations and displacements of the ruptures with photographs and detailed maps. The surface ruptures in this section were predominantly right-lateral and generally accompanied vertical displacement up-to-the-south in the southwestern part and up-to-the-north in the northeastern part. At Dozon in Mashiki Town, we measured the largest right-lateral offset of 225 cm among the entire surface ruptures of the 2016 Kumamoto earthquake sequence.
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The supplementary material of this book contains geographical information system (GIS) and spreadsheet files of the surface ruptures associated with the mainshock of the 2016 Kumamoto earthquake sequence
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Acknowledgements
We would like to thank Akihiro Murata, Professor Emeritus, Tokushima University for providing us with spectacular air photos. This study was supported by the JSPS grants 18H03601.
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Kumahara, Y. et al. (2022). Surface Ruptures Along the Central–Northern Part of the Futagawa Fault. In: Kumahara, Y., Kaneda, H., Tsutsumi, H. (eds) Surface Ruptures Associated with the 2016 Kumamoto Earthquake Sequence in Southwest Japan. Advances in Geological Science. Springer, Singapore. https://doi.org/10.1007/978-981-19-1150-7_10
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DOI: https://doi.org/10.1007/978-981-19-1150-7_10
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