Ground uplift detected by precise leveling in the Ontake earthquake swarm area, central Japan in 2002-2004

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概要

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• Repeated precise leveling in the earthquake swarm area of Ontake, central Japan has revealed uplift of 3-6 mm in proximity to the epicentral region of the most active earthquake cluster in 2002-2004. Although the uplift is small, the vertical displacement is significant even considering leveling error. This uplift is associated with increases in <SUP>3</SUP>He/<SUP>4</SUP>He ratios and CO<SUB>2</SUB> δ<SUP>13</SUP>C values at a mineral spring in the region, indicating an upper mantle contribution. A region of low resistivity at a depth of 2 km beneath the uplift area has also been inferred, suggesting that the observed uplift is related to changes in a shallow seismogenic layer due to increased hydrothermal input from the earthquake swarm area.

• 公益社団法人 日本地震学会、地球電磁気・地球惑星圏学会 、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会の論文

著者

• Irwan Meilano

  Graduate School Of Environmental Studies Nagoya University

• Kimata Fumiaki

  Graduate School Of Environmental Studies Nagoya University

• Koyama Etsuro

  Earthquake Research Institute University Of Tokyo

• Okada Jun

  Graduate School Of Engineering Osaka University

• Ito Takeo

  Graduate School Of Environmental Studies Nagoya University

• Irwan Meilano

  Graduate School of Environmental Studies, Nagoya University

• Miyajima Rikio

  Graduate School of Environmental Studies, Nagoya University

• Murase Masayuki

  Graduate School of Environmental Studies, Nagoya University

• Darwaman Dudy

  Graduate School of Environmental Studies, Nagoya University

• Ohata Yusaku

  Graduate School of Environmental Studies, Nagoya University

• Takano Kazutomo

  Graduate School of Environmental Studies, Nagoya University

• Ibrahim Fauzan

  Graduate School of Environmental Studies, Nagoya University

• Tsuji Hiroshi

  Earthquake Research Institute, University of Tokyo

• Takayama Teturo

  Disaster Prevention Research Institute, Kyoto University

• Uchida Kazuya

  Graduate Schoo1 of Science, Kyushu University

• Solim David

  Department of Geodesy, Institute of Technology

• Anderson Herri

  Department of Geodesy, Institute of Technology

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