Newly-found Surface Faulting Event on the North-central Portion of the Itoigawa-Shizuoka Tectonic Line Active Fault System
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- TANIGUCHI Kaoru
- Active Fault and Earthquake Research Center, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology
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- WATANABE Mitsuhisa
- Toyo University
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- SUZUKI Yasuhiro
- Nagoya University
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- SAWA Hiroshi
- Tsuruoka National College of Technology
Bibliographic Information
- Other Title
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- 糸魚川‐静岡構造線活断層系中北部で新たに得られた活動時期
- 糸魚川-静岡構造線活断層系中北部で新たに得られた活動時期
- イトイガワ-シズオカ コウゾウセンカツダンソウケイ ナカキタブ デ アラタ ニ エラレタ カツドウ ジキ
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Description
The 150 km long Itoigawa-Shizuoka Tectonic Line Active Fault System (ISTL) in central Japan is one of the most active fault systems in Japan. Paleoseismologcal studies 1980s have revealed that the most recent event and the average recurence interval of the ISTL. The approximately 7 km long portion of the fault system between Matsumoto and Okaya has been regarded as a gap without any active fault trace. The gap namely the “Shiojiri Pass Gap” has long been taken as a segment boundary owing to the geometric discontinuity. Recent geomorphological analyses of the gap have demonstrated a through-going left-lateral slip assocaited with recent earthquakes in this area, based on aerial photograph interpretation and excavation studies. Excavation study on this portion revealed that the latest faulting event occurred between 1,700 cal. B.P. to 1,310 cal. B.P. (255 A.D. -645 A.D.). The timing of the last faulting event at this study area coincides with the timing in the Gofukuji fault and Okaya fault. The active faults extending from the Matsumoto basin as far as the northwestern margin of the Suwa basin display the evidence for its recent reactivation at the same time.
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.) 64 (1), 11-21, 2011
SEISMOLOGICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679281381888
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- NII Article ID
- 10029579339
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- NII Book ID
- AN00305741
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- ISSN
- 18839029
- 2186599X
- 00371114
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- NDL BIB ID
- 024341896
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed