A dense GPS observation immediately after the 2004 mid-Niigata prefecture earthquake
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- Takahashi Hiroaki
- Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University
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- Matsushima Takeshi
- Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University
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- Kato Teruyuki
- Earthquake Research Institute, University of Tokyo
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- Takeuchi Akira
- Department of Earth Sciences, Toyama University
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- Yamaguchi Teruhiro
- Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University
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- Kohno Yuhki
- Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University
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- Katagi Takeshi
- Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University
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- Fukuda Jun'ichi
- Earthquake Research Institute, University of Tokyo
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- Hatamoto Kazuya
- Department of Earth Sciences, Toyama University
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- Doke Ryousuke
- Department of Earth Sciences, Toyama University
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- Matsu'ura Yuki
- Department of Earth Sciences, Toyama University
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- Kasahara Minoru
- Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University
Bibliographic Information
- Other Title
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- dense GPS observation immediately after the 2004 mid Niigata prefecture earthquake
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Abstract
To investigate the postseismic crustal deformation associated with the 2004 mid-Niigata prefecture earthquake (M6.8), we newly started GPS observation to fill a gap of the nationwide continuous GPS network. Our GPS sites were mainly distributed in the focal region without permanent GPS site, and succeeded in obtaining the postseismic deformation. Coseismic displacements of two aftershocks were clearly detected because of immediate observation. Estimated fault parameters of the aftershock (M5.9) on November 8 occurring just beneath our GPS network indicated that geodetic data could be explained by either east- or west-dipping fault model inferred from detailed aftershock data. Moreover, clear postseismic deformation, which could be characterized by a logarithmic decay function, was observed. This signal probably suggests possible aseismic slip. Our results indicated that dense GPS observation could give important and interesting data to clarify the properties of shallow inland middle-size earthquakes.
Journal
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- Earth, Planets and Space
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Earth, Planets and Space 57 (7), 661-665, 2005
Society of Geomagnetism and Earth, Planetary and Space Sciences, The Seismological Society of Japan, The Volcanological Society of Japan , The Geodetic Society of Japan , The Japanese Society for Planetary Sciences
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Details 詳細情報について
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- CRID
- 1390282681488532864
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- NII Article ID
- 10017469607
- 130003781096
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- NII Book ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL BIB ID
- 7379113
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed