Eruptions and earthquakes in and around Izu Arc area during the ninth century ; aiming the understandings of the tectonics
| Project/Area Number |
17540430
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Chiba University |
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Principal Investigator |
TSUKUI Masashi Chiba University, school of Science, Associate Professor (50192191)
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| Co-Investigator(Kenkyū-buntansha) |
HIROI Yoshikuni Chiba University, Graduate School of Science, Professor (40019427)
FURUKAWA Nobotu Chiba University, Graduate School of Science, Research Associate (40251194)
NAKANO Shun AIST, Geological Survey of Japan, Institute of Geology and Geoinformation Volcanic Activity Research Group, Group Leader (40357645)
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| Project Period (FY) |
2005 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,680,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥180,000)
Fiscal Year 2007: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2006: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2005: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | Izu Islands / 9th century / historical document / linkage of eruptions and earthquakes / tectonics / Amurian Plate eastern margin / E-W shortening / 火山噴火 / 地震 / 火山地質 / 神階の昇授 |
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| Research Abstract |
Aiming to clarify the unique tectonics in and around to northern part of Izu Arc in the 9th century, we re-examined eruptions and seismicity occurred in the northern part of Izu Arc in the century.
Based on geological, archaeological data and historical documents, we confirmed that eruptions and earthquakes were really vigorous in that period, as so far pointed out Big eruptions repeatedly took place in the 9th century, at Kozushima, Niijima, Miyakejima and Oshima volcanoes. Moreover, Fuji volcano was active and a couple of big earthquakes also occurred on Kanto inland. In addition, compiled results showed that seismic activity was also at a high level including surrounding area. Destructive earthquakes successively hit along the Itoigawa-Shizuoka active fault system, Akita Plains, Shonai Plains, Echigo Plains, Nagano fault system, and Nankai trough. Niigata-Yakeyama and Chokai volcanoes also erupted in that period. These activities in the middle of the 9th century were concentrated in Izu Islands and along boundary between the East and West Japan. These suggest a linkage of big eruptions and seismic activities over 800km long crossing Japan Arc. Geologically these events seem to express the East-West shortening along eastern margin of Amurian Plate over 800km, driven by the eastward motion of the plate.
We point out the similarity of volcanic and seismic activities during the recent 50 years to those happened during the 9th century, in their source areas and manner. Some scientists that the central part of the Itoigawa-Shizuoka tectonic line active fault system and Fujigawa fault system are overdue to the average recurrence period. In this context we cannot discard the worst scenario that the collapse and eruption of Fuji volcano may follow the coming big earthquake along the eastern margin of the Amurian plate.
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Report
(4 results)
Research Products
(47 results)
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[Journal Article] Deep drilling at the arc-arc collision zone in the Yamakita area, central Honshu, Japan2006
Author(s)
Sekiguchi, S., Hayashi, H., Tsukui M., Uesugi. Y., Ito, T., Tanak, Y., Takahashi, M., Yanagisawa, Y., Yamamizu, F., Obara, K., Hori, S., Shiomi, K., Kimura, H., Matsubara, M. and Kasahara, K.
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Journal Title
Bull. Earthq. Res. Inst. Univ. Tokyo 81
Pages: 291-294
NAID
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Journal Article] Volcanics and constraints on the shallow crustal structure of northern end of Izu arc - from Hakone and Pre-Hakone volcanic rocks recovered from deep drilling at Yamakita-minami area, Kanagawa Prefecture, central Honshu, Japan2006
Author(s)
Tsukui, M., Yamazaki, M., Matsui, T., Oyamada, H., Uesugi, Y., Hayashi, H., Yanagisawa, Y. and Kasahara, K.
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Journal Title
Bull. Geol. Surv. Japan 57
Pages: 197-215
NAID
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Cities on Volcanoes 5 Conference2007
Author(s)
TsukuL M, Nakano, S. and saito, K
Organizer
Linkage of eruptions and earthquakes in the 9th century along boundary between East-West Jaan.(21b-PO8.abstract volume 131)
Place of Presentation
Shimabara,Nagasaki.
Year and Date
2007-11-22
Related Report
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[Presentation] 新島火山の火砕物層序とマグマ進化過程.2007
Author(s)
齋藤 公一滝・津久井 雅志・磯部 一洋
Organizer
日本地球惑星科学連合2007年大会
Place of Presentation
千葉県 幕張メッセ
Year and Date
2007-05-21
Description
「研究成果報告書概要(和文)」より
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[Presentation] Rhyolite tephras from Kozushima, Niijima and Omurodasi Volcanoes in Izu Islands2007
Author(s)
Saito, K., Hayashi, K., Tamura, I., Kouno, K., Niihori K., and Tsukui, M.
Organizer
Japan Association for Quaternary Research 2007 meeting (P-03)
Place of Presentation
Kobe Univ.
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 伊豆弧・富士山9世紀一斉噴火について.2006
Author(s)
津久井 雅志・齋藤 公一滝・林 幸一郎・中野 俊
Organizer
日本火山学会2006年秋季大会
Place of Presentation
熊本県 阿蘇いこいの村
Year and Date
2006-10-23
Description
「研究成果報告書概要(和文)」より
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[Presentation] Petrography of the deep drilling at the arc-arc collision zone in the Yamakita area, Kanagawa Prefecture, central Honshu, Japan2005
Author(s)
Yamazaki, M., Matsui, T., Oyamada, H., Tsukui, M , Uesugi, Y., Hayashi, H, Yanagisawa, Y., Tanaka Y. and Kasahara, K.
Organizer
2005 Japan Earth and Planetary Science Joint Meeting (G015-P009)
Place of Presentation
Makuhari, Chiba.
Year and Date
2005-05-24
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 10Be abundance in volcanic rocks from Izu arc and its relation with other trace elements2005
Author(s)
Gotan, K., Nakai, S. Niihori, K., Tsukui, M., Fujii, T., Nakada, S. and Matsuzaki, H.
Organizer
2005 Japan Earth and Planetary Science Joint Meeting (C003-P003)
Place of Presentation
Makuhari, Chiba.
Year and Date
2005-05-23
Description
「研究成果報告書概要(欧文)」より
Related Report
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