Offshore geodetic data conducive to the estimation of the afterslip distribution following the 2003 Tokachi-oki earthquake

被引：68

作者：

Baba, T

Hirata, K

Hori, T

Sakaguchi, H

机构：

[1] Japan Agcy Marine Earth Sci & Technol, Inst Res Earth Evolut, Res Program Plate Dynam, Kanazawa Ku, Yokohama, Kanagawa 2360001, Japan

[2] Japan Agcy Marine Earth Sci & Technol, Inst Res Earth Evolut, Res Program Mantle Core Dyna,, Yokosuka, Kanagawa 2370061, Japan

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 2006年 / 241卷 / 1-2期

关键词：

The 2003 Tokachi-oki earthquake; afterslip; frictional properties; geodetic inversion; offshore data;

D O I：

10.1016/j.epsl.2005.10.019

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

A cable-based seafloor observatory located offshore of Hokkaido, Japan, provides the world's first direct observation of offshore post-seismic displacement. After removing thermal noise, this data is used to constrain the distribution of offshore afterslip from a great interplate earthquake (M-w 8.0) that occurred during 2003 along the southern Kuril Trench. A checkerboard resolution test showed a great contribution of the offshore data to improving the spatial resolution on the plate interface slip near the trench. The 1-yr afterslip is distributed in a U-shaped pattern encircling its co-seismic slip area. This result indicates that the stick-slip frictional properties of the plate interface are distributed in a patch-like pattern as opposed to a banding pattern as previously assumed in young subduction zones. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：281 / 292

页数：12

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