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Abstract

The ~7-km-long N20°E-trending southernmost section of the 2016 surface rupture extended from Shirahata to Oike and is characterized by a relatively simple and straight trace. This section cuts across alluvial plains and fluvial terrace surfaces and closely coincided with the previously mapped active fault trace. The section seemed to rupture the northernmost part of the NNE-trending Hinagu fault, or a transition zone between the Hinagu fault and the NE-trending Futagawa fault. Right-lateral offset was commonly observed along this section of the surface rupture, with offsets ranging from a few to 65 cm. In contrast, vertical displacement was largely negligible.

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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

This study was supported by the JSPS grants 18H03601.

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Correspondence to Yasuhiro Kumahara .

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Kumahara, Y., Ishiyama, T., Matta, N., Kagohara, K., Hirouchi, D., Ishiguro, S. (2022). Surface Ruptures of the Shirahata–Oike Section. 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_7

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