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dc.contributor.authorKoki Aizawaen_US
dc.contributor.authorHirochika Suminoen_US
dc.contributor.authorMakoto Uyeshimaen_US
dc.contributor.authorYusuke Yamayaen_US
dc.contributor.authorHideaki Haseen_US
dc.contributor.authorHiroshi A. Takahashien_US
dc.contributor.authorMasaaki Takahashien_US
dc.contributor.authorKohei Kazahayaen_US
dc.contributor.authorMasao Ohnoen_US
dc.contributor.authorTawat Rung-Arunwanen_US
dc.contributor.authorYasuo Ogawaen_US
dc.contributor.otherUniversity of Tokyoen_US
dc.contributor.otherKyushu Universityen_US
dc.contributor.otherNational Institute of Advanced Industrial Science and Technologyen_US
dc.contributor.otherGeothermal Energy Research and Development Co., Ltd. (GERD)en_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherTokyo Institute of Technologyen_US
dc.identifier.citationGeology. Vol.44, No.2 (2016), 127-130en_US
dc.description.abstract© 2016 Geological Society of America. Large earthquakes sometimes trigger local seismicity that is distal to their rupture zones. Various mechanisms for this triggered seismicity have been proposed, based on either the static stress change or ground shaking from seismic waves, but local geological structure is rarely studied to discern why this seismicity is remotely induced. We present the results of a joint three-dimensional resistivity and isotopic analysis of the groundwater system surrounding Mount Fuji, Japan, where increased seismicity was observed following the A.D. 2011 Tohoku- Oki megathrust earthquake. An electrically conductive zone and high concentrations of magmatic gases (He and CO2) correspond to the zone of triggered seismicity. In contrast, a contribution of magmatic water is not suggested from 2H (deuterium, D) and 18O isotope ratios. These results suggest that the earthquakes were triggered within a fractured zone through which magmatic gases preferentially migrated. We hypothesize that the upwelling of gas-rich hydrous fluids and/or gas bubbles occurred along this fracture pathway, causing an increase in the pore pressure and triggering the resultant earthquake sequence.en_US
dc.rightsMahidol Universityen_US
dc.subjectEarth and Planetary Sciencesen_US
dc.titleGas pathways and remotely triggered earthquakes beneath Mount Fuji, Japanen_US
Appears in Collections:Scopus 2016-2017

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