Aseismic slow slip on an inland active fault triggered by a nearby shallow event, the 2008 Iwate-Miyagi Nairiku earthquake (Mw6.8)

被引：27

作者：

Iinuma, T. ^{[1
]}

Ohzono, M. ^{[1
]}

Ohta, Y. ^{[1
]}

Miura, S. ^{[1
]}

Kasahara, M. ^{[3
]}

Takahashi, H. ^{[3
]}

Sagiya, T. ^{[2
]}

Matsushima, T. ^{[4
]}

Nakao, S. ^{[5
]}

Ueki, S. ^{[1
]}

Tachibana, K. ^{[1
]}

Sato, T. ^{[1
]}

Tsushima, H. ^{[1
]}

Takatsuka, K. ^{[1
]}

Yamaguchi, T. ^{[3
]}

Ichiyanagi, M. ^{[3
]}

Takada, M. ^{[3
]}

Ozawa, K. ^{[2
]}

Fukuda, M. ^{[2
]}

Asahi, Y. ^{[2
]}

Nakamoto, M. ^{[4
]}

Yamashita, Y. ^{[4
]}

Umino, N. ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Sci, Res Ctr Predict Earthquakes & Volcan Erupt, Aoba Ku, Sendai, Miyagi 9808578, Japan

[2] Nagoya Univ, Grad Sch Environm Studies, Res Ctr Seismol Volcanol & Disaster Mitigat, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[3] Hokkaido Univ, Grad Sch Sci, Inst Seismol & Volcanol, Kita Ku, Sapporo, Hokkaido 0600810, Japan

[4] Kyushu Univ, Fac Sci, Inst Seismol & Volcanol, Nagasaki 8550843, Japan

[5] Kagoshima Univ, Grad Sch Sci & Engn, Dept Earth & Environm Sci, Kagoshima 8900065, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

关键词：

CALIFORNIA; JAPAN;

D O I：

10.1029/2009GL040063

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Using GPS observations, we have detected an aseismic slip event on the intraplate Dedana Fault that was triggered by the Iwate-Miyagi Nairiku earthquake (Mw6.8, 13 Jun 2008 UTC) on a nearby but separate fault. The observations cannot be satisfactorily explained in terms of either viscoelastic relaxation or poroelastic rebound, and we cannot explain the observed displacement time series without presuming that aseismic slip occurred on the Dedana Fault. This slip was likely triggered by the mainshock stress change. The detection of future such aseismic slip events on intraplate faults is likely to require denser geodetic networks than are currently in operation, but is important for fully characterizing the seismic hazard associated with intraplate earthquakes. Citation: Iinuma, T., et al. (2009), Aseismic slow slip on an inland active fault triggered by a nearby shallow event, the 2008 Iwate-Miyagi Nairiku earthquake (Mw6.8), Geophys. Res. Lett., 36, L20308, doi:10.1029/2009GL040063.

引用

页数：5

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