Rapid ground deformation of the Miyakejima volcano on 26-27 June 2000 detected by kinematic GPS analysis

• Irwan Meilano

  Graduate School of Environmental Studies, Research Center for Seismology and Volcanology, Nagoya University

• Kimata Fumiaki

  Graduate School of Environmental Studies, Research Center for Seismology and Volcanology, Nagoya University

• Fujii Naoyuki

  Graduate School of Environmental Studies, Research Center for Seismology and Volcanology, Nagoya University

• Nakao Shigeo

  Earthquake Research Institute, University of Tokyo

• Watanabe Hidehumi

  Earthquake Research Institute, University of Tokyo

• Sakai Shinichi

  Earthquake Research Institute, University of Tokyo

• Ukawa Motoo

  National Research Institute for Earth Science and Disaster Prevention

• Fujita Eisuke

  National Research Institute for Earth Science and Disaster Prevention

• Kawai Koji

  Japan Hydrographic Department, Marine Preservation

抄録

A kinematic GPS analysis of data from the Miyakejima volcano captured a fast developing deformation event on 26-27 June 2000 in unprecedented spatial and temporal detail. Initial ground deformation toward east and upward was observed in the southeastern part of the volcano at 18 : 00 on 26 June 2000, almost simultaneous with earthquake swarms. Some time after 21 : 30 on 26 June 2000 the displacements at these sites turned from eastward to westward. Three hours later the displacement rates increased gradually at GPS sites in the western part of Miyakejima as the seismicity migrated and approached the west coast, and reached a climax with submarine eruption at 09 : 00 on 27 June 2000. A Genetic Algorithm was used to explore the parameter space and to find the best fitting source geometry. This analysis leads to an interpretation that the 18 : 00 26 June earthquake swarm was caused by a dike intrusion near the Oyama crater. Starting from 21 : 30 this dike deflated and a new dike intruded near the west coast. Following the propagation of this dike to the offshore, a spherical source began deflating in the southwest of Oyama crater.

収録刊行物

• Ｅａｒｔｈ，　Ｐｌａｎｅｔｓ　ａｎｄ　Ｓｐａｃｅ

  Ｅａｒｔｈ，　Ｐｌａｎｅｔｓ　ａｎｄ　Ｓｐａｃｅ 55 (6), e13-e16, 2003

  地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、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

キーワード

• Miyakejima
• rapid deformation
• kinematic GPS

詳細情報

• CRID: 1390282681489575040
• NII論文ID: 10012741067
• NII論文ID: 130003780974
• NII書誌ID: AA11211921
• DOI: 10.1186/bf03351761
• ISSN: 18805981
• ISSN: 13438832
• NDL書誌ID: 6885557
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6885557
• Web Site: https://link.springer.com/content/pdf/10.1186/BF03351761.pdf
• Web Site: https://link.springer.com/article/10.1186/BF03351761/fulltext.html
• Web Site: http://link.springer.com/content/pdf/10.1186/BF03351761
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可