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Title: Rupture process of the 2016 Kumamoto earthquake in relation to the thermal structure around Aso volcano
Authors: Yagi, Yuji
Okuwaki, Ryo
Enescu, Bogdan  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-2153-0097 (unconfirmed)
Kasahara, Amato
Miyakawa, Ayumu
Otsubo, Makoto
Keywords: 2016 Kumamoto earthquake
Rupture process
Foreshocks and aftershocks
Mt. Aso
Magma chamber
Issue Date: 14-Jul-2016
Publisher: Springer Nature
Journal title: Earth, Planets and Space
Volume: 68
Thesis number: 118
Abstract: We constructed the rupture process model for the 2016 Kumamoto, Japan, earthquake from broadband teleseismic body waveforms (P-waves) by using a novel waveform inversion method that takes into account the uncertainty of Green’s function. The estimated source parameters are: seismic moment = 5.1 × 1019 Nm (Mw = 7.1), fault length = 40 km, and fault width = 15 km. The mainshock rupture mainly propagated northeastward from the epicenter, for about 30 km, along an active strike-slip fault. The rupture propagation of the mainshock decelerated and terminated near the southwest side of the Aso volcano; the aftershock activity was low around the northeastern edge of the major slip area. Our results suggest that the rupture process of the mainshock and the distribution of aftershocks were influenced by the high-temperature area around the magma chamber of Mt. Aso
Rights: © 2016 The Author(s). 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.
URI: http://hdl.handle.net/2433/218891
DOI(Published Version): 10.1186/s40623-016-0492-3
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