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

Earth, Planets and Space volume 55, pages e13–e16 (2003)Cite this article

Abstract

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.

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Authors and Affiliations

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

    Meilano Irwan, Fumiaki Kimata & Naoyuki Fujii

  2. Earthquake Research Institute, University of Tokyo, Tokyo, Japan

    Shigeo Nakao, Hidehumi Watanabe & Shinichi Sakai

  3. National Research Institute for Earth Science and Disaster Prevention, Tsukuba, Japan

    Motoo Ukawa & Eisuki Fujita

  4. Japan Hydrographic Department, Marine Preservation, Tokyo, Japan

    Koji Kawai

Authors
  1. Meilano Irwan
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  2. Fumiaki Kimata
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  3. Naoyuki Fujii
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  4. Shigeo Nakao
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  5. Hidehumi Watanabe
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  6. Shinichi Sakai
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  7. Motoo Ukawa
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  8. Eisuki Fujita
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  9. Koji Kawai
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Correspondence to Meilano Irwan.

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Irwan, M., Kimata, F., Fujii, N. et al. Rapid ground deformation of the Miyakejima volcano on 26–27 June 2000 detected by kinematic GPS analysis. Earth Planet Sp 55, e13–e16 (2003). https://doi.org/10.1186/BF03351761

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  • DOI: https://doi.org/10.1186/BF03351761

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