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Structural features and seismotectonic implications of coseismic surface ruptures produced by the 2016 M(w) 7.1 Kumamoto earthquake
Field investigations and analyses of satellite images and aerial photographs reveal that the 2016 M (w) 7.1 (Mj 7.3) Kumamoto earthquake produced a ∼40-km surface rupture zone striking NE-SW on central Kyushu Island, Japan. Coseismic surface ruptures were characterized by shear faults, extensional c...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Springer Netherlands
2017
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5563349/ https://www.ncbi.nlm.nih.gov/pubmed/28867959 http://dx.doi.org/10.1007/s10950-017-9653-5 |
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author | Lin, Aiming |
author_facet | Lin, Aiming |
author_sort | Lin, Aiming |
collection | PubMed |
description | Field investigations and analyses of satellite images and aerial photographs reveal that the 2016 M (w) 7.1 (Mj 7.3) Kumamoto earthquake produced a ∼40-km surface rupture zone striking NE-SW on central Kyushu Island, Japan. Coseismic surface ruptures were characterized by shear faults, extensional cracks, and mole tracks, which mostly occurred along the pre-existing NE-SW-striking Hinagu–Futagawa fault zone in the southwest and central segments, and newly identified faults in the northeast segment. This study shows that (i) the Hinagu–Futagawa fault zone triggered the 2016 Kumamoto earthquake and controlled the spatial distribution of coseismic surface ruptures; (ii) the southwest and central segments were dominated by right-lateral strike-slip movement with a maximum in-site measured displacement of up to 2.5 m, accompanied by a minor vertical component. In contrast, the northeast segment was dominated by normal faulting with a maximum vertical offset of up to 1.75 m with a minor horizontal component that formed graben structures inside Aso caldera; (iii) coseismic rupturing initiated at the jog area between the Hinagu and Futagawa faults, then propagated northeastward into Aso caldera, where it terminated. The 2016 M (w) 7.1 Kumamoto earthquake therefore offers a rare opportunity to study the relationships between coseismic rupture processes and pre-existing active faults, as well as the seismotectonics of Aso volcano. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10950-017-9653-5) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-5563349 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Springer Netherlands |
record_format | MEDLINE/PubMed |
spelling | pubmed-55633492017-09-01 Structural features and seismotectonic implications of coseismic surface ruptures produced by the 2016 M(w) 7.1 Kumamoto earthquake Lin, Aiming J Seismol Original Article Field investigations and analyses of satellite images and aerial photographs reveal that the 2016 M (w) 7.1 (Mj 7.3) Kumamoto earthquake produced a ∼40-km surface rupture zone striking NE-SW on central Kyushu Island, Japan. Coseismic surface ruptures were characterized by shear faults, extensional cracks, and mole tracks, which mostly occurred along the pre-existing NE-SW-striking Hinagu–Futagawa fault zone in the southwest and central segments, and newly identified faults in the northeast segment. This study shows that (i) the Hinagu–Futagawa fault zone triggered the 2016 Kumamoto earthquake and controlled the spatial distribution of coseismic surface ruptures; (ii) the southwest and central segments were dominated by right-lateral strike-slip movement with a maximum in-site measured displacement of up to 2.5 m, accompanied by a minor vertical component. In contrast, the northeast segment was dominated by normal faulting with a maximum vertical offset of up to 1.75 m with a minor horizontal component that formed graben structures inside Aso caldera; (iii) coseismic rupturing initiated at the jog area between the Hinagu and Futagawa faults, then propagated northeastward into Aso caldera, where it terminated. The 2016 M (w) 7.1 Kumamoto earthquake therefore offers a rare opportunity to study the relationships between coseismic rupture processes and pre-existing active faults, as well as the seismotectonics of Aso volcano. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10950-017-9653-5) contains supplementary material, which is available to authorized users. Springer Netherlands 2017-03-21 2017 /pmc/articles/PMC5563349/ /pubmed/28867959 http://dx.doi.org/10.1007/s10950-017-9653-5 Text en © The Author(s) 2017 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Original Article Lin, Aiming Structural features and seismotectonic implications of coseismic surface ruptures produced by the 2016 M(w) 7.1 Kumamoto earthquake |
title | Structural features and seismotectonic implications of coseismic surface ruptures produced by the 2016 M(w) 7.1 Kumamoto earthquake |
title_full | Structural features and seismotectonic implications of coseismic surface ruptures produced by the 2016 M(w) 7.1 Kumamoto earthquake |
title_fullStr | Structural features and seismotectonic implications of coseismic surface ruptures produced by the 2016 M(w) 7.1 Kumamoto earthquake |
title_full_unstemmed | Structural features and seismotectonic implications of coseismic surface ruptures produced by the 2016 M(w) 7.1 Kumamoto earthquake |
title_short | Structural features and seismotectonic implications of coseismic surface ruptures produced by the 2016 M(w) 7.1 Kumamoto earthquake |
title_sort | structural features and seismotectonic implications of coseismic surface ruptures produced by the 2016 m(w) 7.1 kumamoto earthquake |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5563349/ https://www.ncbi.nlm.nih.gov/pubmed/28867959 http://dx.doi.org/10.1007/s10950-017-9653-5 |
work_keys_str_mv | AT linaiming structuralfeaturesandseismotectonicimplicationsofcoseismicsurfacerupturesproducedbythe2016mw71kumamotoearthquake |