Stress state in the largest displacement area of the 2011 Tohoku-Oki earthquake

Weiren Lin; Marianne Conin; J. Casey Moore; Frederick M. Chester; Yasuyuki Nakamura; James J. Mori; Louise Anderson; Emily E. Brodsky; Nobuhisa Eguchi; Becky Cook; Tamara Jeppson; Monica Wolfson-Schwehr; Yoshinori Sanada; Saneatsu Saito; Yukari Kido; Takehiro Hirose; Jan H. Behrmann; Matt Ikari; Kohtaro Ujiie; Christie Rowe; James Kirkpatrick; Santanu Bose; Christine Regalla; Francesca Remitti; Virginia Toy; Patrick Fulton; Toshiaki Mishima; Tao Yang; Tianhaozhe Sun; Tsuyoshi Ishikawa; James Sample; Ken Takai; Jun Kameda; Sean Toczko; Lena Maeda; Shuichi Kodaira; Ryota Hino; Demian Saffer

doi:10.1126/science.1229379

Stress state in the largest displacement area of the 2011 Tohoku-Oki earthquake

Weiren Lin, Marianne Conin, J. Casey Moore, Frederick M. Chester, Yasuyuki Nakamura, James J. Mori, Louise Anderson, Emily E. Brodsky, Nobuhisa Eguchi, Becky Cook, Tamara Jeppson, Monica Wolfson-Schwehr, Yoshinori Sanada, Saneatsu Saito, Yukari Kido, Takehiro Hirose, Jan H. Behrmann, Matt Ikari, Kohtaro Ujiie, Christie RoweJames Kirkpatrick, Santanu Bose, Christine Regalla, Francesca Remitti, Virginia Toy, Patrick Fulton, Toshiaki Mishima, Tao Yang, Tianhaozhe Sun, Tsuyoshi Ishikawa, James Sample, Ken Takai, Jun Kameda, Sean Toczko, Lena Maeda, Shuichi Kodaira, Ryota Hino, Demian Saffer

Earth and Sustainability

Research output: Contribution to journal › Article › peer-review

127 Scopus citations

Abstract

The 2011 moment magnitude 9.0 Tohoku-Oki earthquake produced a maximum coseismic slip of more than 50 meters near the Japan trench, which could result in a completely reduced stress state in the region. We tested this hypothesis by determining the in situ stress state of the frontal prism from boreholes drilled by the Integrated Ocean Drilling Program approximately 1 year after the earthquake and by inferring the pre-earthquake stress state. On the basis of the horizontal stress orientations and magnitudes estimated from borehole breakouts and the increase in coseismic displacement during propagation of the rupture to the trench axis, in situ horizontal stress decreased during the earthquake. The stress change suggests an active slip of the frontal plate interface, which is consistent with coseismic fault weakening and a nearly total stress drop.

Original language	English (US)
Pages (from-to)	687-690
Number of pages	4
Journal	Science
Volume	339
Issue number	6120
DOIs	https://doi.org/10.1126/science.1229379
State	Published - Feb 8 2013

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Lin, W., Conin, M., Moore, J. C., Chester, F. M., Nakamura, Y., Mori, J. J., Anderson, L., Brodsky, E. E., Eguchi, N., Cook, B., Jeppson, T., Wolfson-Schwehr, M., Sanada, Y., Saito, S., Kido, Y., Hirose, T., Behrmann, J. H., Ikari, M., Ujiie, K., ... Saffer, D. (2013). Stress state in the largest displacement area of the 2011 Tohoku-Oki earthquake. Science, 339(6120), 687-690. https://doi.org/10.1126/science.1229379

Lin, W, Conin, M, Moore, JC, Chester, FM, Nakamura, Y, Mori, JJ, Anderson, L, Brodsky, EE, Eguchi, N, Cook, B, Jeppson, T, Wolfson-Schwehr, M, Sanada, Y, Saito, S, Kido, Y, Hirose, T, Behrmann, JH, Ikari, M, Ujiie, K, Rowe, C, Kirkpatrick, J, Bose, S, Regalla, C, Remitti, F, Toy, V, Fulton, P, Mishima, T, Yang, T, Sun, T, Ishikawa, T, Sample, J, Takai, K, Kameda, J, Toczko, S, Maeda, L, Kodaira, S, Hino, R & Saffer, D 2013, 'Stress state in the largest displacement area of the 2011 Tohoku-Oki earthquake', Science, vol. 339, no. 6120, pp. 687-690. https://doi.org/10.1126/science.1229379

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title = "Stress state in the largest displacement area of the 2011 Tohoku-Oki earthquake",

abstract = "The 2011 moment magnitude 9.0 Tohoku-Oki earthquake produced a maximum coseismic slip of more than 50 meters near the Japan trench, which could result in a completely reduced stress state in the region. We tested this hypothesis by determining the in situ stress state of the frontal prism from boreholes drilled by the Integrated Ocean Drilling Program approximately 1 year after the earthquake and by inferring the pre-earthquake stress state. On the basis of the horizontal stress orientations and magnitudes estimated from borehole breakouts and the increase in coseismic displacement during propagation of the rupture to the trench axis, in situ horizontal stress decreased during the earthquake. The stress change suggests an active slip of the frontal plate interface, which is consistent with coseismic fault weakening and a nearly total stress drop.",

author = "Weiren Lin and Marianne Conin and Moore, {J. Casey} and Chester, {Frederick M.} and Yasuyuki Nakamura and Mori, {James J.} and Louise Anderson and Brodsky, {Emily E.} and Nobuhisa Eguchi and Becky Cook and Tamara Jeppson and Monica Wolfson-Schwehr and Yoshinori Sanada and Saneatsu Saito and Yukari Kido and Takehiro Hirose and Behrmann, {Jan H.} and Matt Ikari and Kohtaro Ujiie and Christie Rowe and James Kirkpatrick and Santanu Bose and Christine Regalla and Francesca Remitti and Virginia Toy and Patrick Fulton and Toshiaki Mishima and Tao Yang and Tianhaozhe Sun and Tsuyoshi Ishikawa and James Sample and Ken Takai and Jun Kameda and Sean Toczko and Lena Maeda and Shuichi Kodaira and Ryota Hino and Demian Saffer",

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AU - Lin, Weiren

AU - Conin, Marianne

AU - Moore, J. Casey

AU - Chester, Frederick M.

AU - Nakamura, Yasuyuki

AU - Mori, James J.

AU - Anderson, Louise

AU - Brodsky, Emily E.

AU - Eguchi, Nobuhisa

AU - Cook, Becky

AU - Jeppson, Tamara

AU - Wolfson-Schwehr, Monica

AU - Sanada, Yoshinori

AU - Saito, Saneatsu

AU - Kido, Yukari

AU - Hirose, Takehiro

AU - Behrmann, Jan H.

AU - Ikari, Matt

AU - Ujiie, Kohtaro

AU - Rowe, Christie

AU - Kirkpatrick, James

AU - Bose, Santanu

AU - Regalla, Christine

AU - Remitti, Francesca

AU - Toy, Virginia

AU - Fulton, Patrick

AU - Mishima, Toshiaki

AU - Yang, Tao

AU - Sun, Tianhaozhe

AU - Ishikawa, Tsuyoshi

AU - Sample, James

AU - Takai, Ken

AU - Kameda, Jun

AU - Toczko, Sean

AU - Maeda, Lena

AU - Kodaira, Shuichi

AU - Hino, Ryota

AU - Saffer, Demian

PY - 2013/2/8

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N2 - The 2011 moment magnitude 9.0 Tohoku-Oki earthquake produced a maximum coseismic slip of more than 50 meters near the Japan trench, which could result in a completely reduced stress state in the region. We tested this hypothesis by determining the in situ stress state of the frontal prism from boreholes drilled by the Integrated Ocean Drilling Program approximately 1 year after the earthquake and by inferring the pre-earthquake stress state. On the basis of the horizontal stress orientations and magnitudes estimated from borehole breakouts and the increase in coseismic displacement during propagation of the rupture to the trench axis, in situ horizontal stress decreased during the earthquake. The stress change suggests an active slip of the frontal plate interface, which is consistent with coseismic fault weakening and a nearly total stress drop.

AB - The 2011 moment magnitude 9.0 Tohoku-Oki earthquake produced a maximum coseismic slip of more than 50 meters near the Japan trench, which could result in a completely reduced stress state in the region. We tested this hypothesis by determining the in situ stress state of the frontal prism from boreholes drilled by the Integrated Ocean Drilling Program approximately 1 year after the earthquake and by inferring the pre-earthquake stress state. On the basis of the horizontal stress orientations and magnitudes estimated from borehole breakouts and the increase in coseismic displacement during propagation of the rupture to the trench axis, in situ horizontal stress decreased during the earthquake. The stress change suggests an active slip of the frontal plate interface, which is consistent with coseismic fault weakening and a nearly total stress drop.

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Stress state in the largest displacement area of the 2011 Tohoku-Oki earthquake

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