Crustal Deformation After 2004 Niigataken-Chuetsu Earthquake, Central Japan, Investigated by Persistent Scatterer Interferometry
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- Fukushima Yo
- Disaster Prevention Research Institute, Kyoto University
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- Hooper Andrew
- Delft Institute of Earth Observation and Space Systems, Delft University of Technology
Bibliographic Information
- Other Title
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- PS干渉解析による2004年新潟県中越地震後の地殻変動
- PS カンショウ カイセキ ニ ヨル 2004ネン ニイガタケン チュウエツ ジシン ゴ ノ チカク ヘンドウ
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Description
In order to precisely measure the displacement field after the 2004 Niigataken-Chuetsu earthquake, central Japan, we performed a persistent scatterer (PS) interferometry analysis on SAR images acquired by the European satellite ENVISAT. After performing a PS interferometry analysis, we first corrected for artifacts due to orbit inaccuracies and atmospheric phase delay using GPS displacements. This post-processing revealed that the dominant component of the displacements is a seasonal pattern caused by water extraction during winter. Precise estimation of the tectonic component of the displacements, which enables discussion of the order of 1 cm displacements and 1 cm/year velocity, was further obtained by separating out the seasonal component using a principal component analysis. A part of observed signals was consistent with deformations due to afterslips and poroelastic relaxation of the 2004 earthquake. Another part of the signals was consistent with a relative motion of two blocks whose boundary coincides with the Western Nagaoka Plain faults.
Journal
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- Journal of the Geodetic Society of Japan
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Journal of the Geodetic Society of Japan 57 (4), 195-214, 2010
The Geodetic Society of Japan
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Details 詳細情報について
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- CRID
- 1390282679044508672
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- NII Article ID
- 10030358097
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- NII Book ID
- AN00134900
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- ISSN
- 2185517X
- 00380830
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- NDL BIB ID
- 023516143
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed
