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Study on seismotectonic classification of historical earthquakes in the Japanese Islands and mutual correlation among their activities

日本列岛历史地震的地震构造分类及其活动相互关系研究

基本信息

批准号：
09640508
负责人：
ISHIBASHI Katsuhiko
金额：
$ 1.22万
依托单位：
KOBE UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

In order to gain a better understanding of the seismotectonic background of the historical seismicity in the Japanese Islands, for all historical destructive earthquakes listed in the existing earthquake catalog, the Table in Rika-Nenpyo, their source regions have been reexamined through critical reviews of paleoseismological studies so far by paying special attention to the depths of sources. And each earthquake has been allocated to one of the following 16 seismotectonic zones according to the location of its source region : (1) Ryukyu Arc, (2) Hyuuga-nada, (3) Philippine Sea slab, (4) Nankai trough, (5) Southwest Japan Outer Arc, (6) Median Tectonic Line, (7) Southwest Japan Inner Arc, (8) Central Japan Collision Zone, (9) Northernmost Izu Arc, (10) Sagami trough, (11) Southern Kanto district, (12) Japan Sea Eastern Margin - Northeast Japan Inner Arc, (13) Northeast Japan Outer Arc, (14) Pacific slab, (15) Kuril - Japan trench, (16) Pacific plate. By this reexamination and classification, seismotectonic implications of many historical earthquakes have been revised ; e.g., several earthquakes which had been considered to be linked to inland active faults have proved to be slab events within the subducted Philippine Sea plate. Some correlations among historical seismic activities in several seismotectonic zones have been recognized.

为了更好地了解日本列岛历史地震活动性的地震构造背景，对于现有地震目录（Rika-Nenpyo表）中列出的所有历史破坏性地震，通过对迄今为止的古地震学研究的批判性回顾，重新检查了它们的震源区域，并特别注意震源的深度。根据震源区域的位置，每次地震都被划分为以下16个地震构造带之一：(1)琉球弧，(2)日和田，(3)菲律宾海陆，(4)南开海槽，(5)日本西南外弧，(6)中构造线，(7)日本西南内弧，(8)日本中部碰撞带，(9)伊津弧最北端，（10）相模海槽，（11）关东南部地区，（12）日本海东缘-日本东北内弧，（13）日本东北外弧，（14）太平洋板块，（15）千岛岛-日本海沟，（16）太平洋板块。通过这种重新检查和分类，修正了许多历史地震的地震构造意义；例如，几次被认为与内陆活动断层有关的地震已被证明是俯冲菲律宾海板块内的板块事件。认识到几个地震构造带历史地震活动之间存在一定的相关性。