Imaging the Fault Planes of the 2004 Mid Niigata Prefecture (Niigata-Chuetsu) Earthquake Sequence by Applying Double-Difference Tomography to Dense Temporary Observation Network Data
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- OKADA Tomomi
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- UMINO Norihito
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- MATSUZAWA Toru
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- NAKAJIMA Jun'ichi
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- UCHIDA Naoki
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- NAKAYAMA Takashi
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- HIRAHARA Satoshi
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- SATO Toshiya
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- HORI Shu'ichiro
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- KONO Toshio
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- YAGINUMA Tadashi
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- HASEGAWA Akira
- Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University
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- ASANO Youichi
- National Research Institute for Earth Science and Disaster Prevention
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- ZHANG Haijiang
- University of Wisconsin-Madison, Department of Geology and Geophysics
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- THURBER Clifford H.
- University of Wisconsin-Madison, Department of Geology and Geophysics
Bibliographic Information
- Other Title
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- 稠密余震観測データを用いたダブル・ディファレンス・トモグラフィー法による2004年新潟県中越地震の震源断層のイメージング
- チュウミツヨシン カンソク データ オ モチイタ ダブル ディファレンス トモグラフィーホウ ニ ヨル 2004ネン ニイガタケン チュウエツ ジシン ノ シンゲン ダンソウ ノ イメージング
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Abstract
We obtained detailed aftershock distribution and three-dimensional seismic velocity structure in and around the focal area of the 2004 Mid Niigata Prefecture (Niigata-Chuetsu) earthquake (M6.8) by inverting travel time data from a dense observation network and surrounding permanent stations. We adopted double-difference tomography method for the inversions. The fault planes of the main shock and the largest aftershock, which are delineated by two parallel aftershock alignments, took place where seismic velocity changes abruptly at the boundary between the lower velocity hanging wall and the higher velocity footwall for both P- and S-waves. The seismic velocity structure changes along the strike of the faults. The major velocity boundary zone between the lower velocity hanging wall and the higher velocity footwall migrates to the west at a location near the central part of the focal area, where the main shock hypocenter is located. Some parts of the fault planes, e. g. around the hypocenter of the M6 aftershock on Oct. 27, are imaged as low velocity zones. Asperity (large coseismic slip area) of the main shock seems to correspond with a higher velocity portion along the fault plane.
Journal
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- Zisin (Journal of the Seismological Society of Japan. 2nd ser.)
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Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 58 (3), 283-295, 2005
SEISMOLOGICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204306950400
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- NII Article ID
- 10017293213
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- NII Book ID
- AN00305741
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- ISSN
- 18839029
- 2186599X
- 00371114
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- NDL BIB ID
- 7851067
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed