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Eruptions and earthquakes in and around Izu Arc area during the ninth century ; aiming the understandings of the tectonics

九世纪伊豆弧地区及其周边地区的火山喷发和地震；

基本信息

批准号：
17540430
负责人：
TSUKUI Masashi
金额：
$ 2.36万
依托单位：
Chiba University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17540430/
关键词：
Izu Islands 9th century historical document linkage of eruptions and earthquakes tectonics Amurian Plate eastern margin E-W shortening 火山噴火地震火山地質神階の昇授

项目摘要

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and seismicity occurred in the northern part of Izu Arc in the century.Based on geological, archaeological data and historical documents, we confirmed that eruptions and earthquakes were really vigorous in that period, as so far pointed out Big eruptions repeatedly took place in the 9th century,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.

为了阐明9世纪伊豆弧北部及其周围独特的构造，我们重新考察了9世纪伊豆弧北部发生的火山喷发和地震活动。根据地质、考古资料和历史文献，我们证实，在那个时期火山爆发和地震确实很剧烈，正如迄今为止所指出的，9世纪在小岛、新岛、三宅岛和大岛火山多次发生大爆发。此外，富士火山活跃，关东内陆也发生了几次大地震。此外，汇编结果显示，包括周边地区在内的地震活动也处于高水平。沿伊藤川-静冈活动断裂系、秋田平原、正奈平原、越后平原、长野断裂系、南开海槽先后发生破坏性地震。新泻八山火山和朝海火山也在那个时期喷发。这些活动在9世纪中期集中在伊豆群岛和沿东、西日本的边界。这表明大喷发和地震活动的联系超过800公里横跨日本弧。这些事件在地质学上似乎表达了在板块东移的驱动下，沿阿穆里亚板块东缘的东西缩短超过800km。指出近50年来的火山和地震活动与9世纪的火山和地震活动在源区和方式上有相似之处。一些科学家认为，伊藤川—静冈构造线中部的活动断裂系统和藤川断裂系统已经过了平均复现期。在这种情况下，我们不能排除最坏的情况，即富士山火山的崩塌和喷发可能随着阿穆利亚板块东部边缘即将到来的大地震而发生。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Deep drilling at the arc-arc collision zone in the Yamakita area, central Honshu, Japan

日本本州中部山北地区弧-弧碰撞区深钻

DOI：
发表时间：
2006
期刊：
Bull. Earthq. Res. Inst. Univ. Tokyo 81
影响因子：
0
作者：
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.
通讯作者：
K.

9世紀の一斉噴火と地震は東日本の東西短縮の反映である

9世纪同时发生的火山喷发和地震反映了日本东部从东到西的缩短。