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 C 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 C Sample, Ken Takai, Jun Kameda, Sean Toczko, Lena Maeda, Shuichi Kodaira, Ryota Hino, Demian Saffer

Earth Sciences and Environmental Sustainability, School of

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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

Stress state in the largest displacement area of the 2011 Tohoku-Oki earthquake. / Lin, Weiren; Conin, Marianne; Moore, J. Casey; Chester, Frederick M.; Nakamura, Yasuyuki; Mori, James J.; Anderson, Louise; Brodsky, Emily E.; Eguchi, Nobuhisa; Cook, Becky; Jeppson, Tamara; Wolfson-Schwehr, Monica; Sanada, Yoshinori; Saito, Saneatsu; Kido, Yukari; Hirose, Takehiro; Behrmann, Jan H.; Ikari, Matt; Ujiie, Kohtaro; Rowe, Christie; Kirkpatrick, James; Bose, Santanu; Regalla, Christine; Remitti, Francesca; Toy, Virginia; Fulton, Patrick; Mishima, Toshiaki; Yang, Tao; Sun, Tianhaozhe; Ishikawa, Tsuyoshi; Sample, James C; Takai, Ken; Kameda, Jun; Toczko, Sean; Maeda, Lena; Kodaira, Shuichi; Hino, Ryota; Saffer, Demian.

In: Science, Vol. 339, No. 6120, 08.02.2013, p. 687-690.

Research output: Contribution to journal › Article

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, JC, 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

Lin, Weiren ; Conin, Marianne ; Moore, J. Casey ; Chester, Frederick M. ; Nakamura, Yasuyuki ; Mori, James J. ; Anderson, Louise ; Brodsky, Emily E. ; Eguchi, Nobuhisa ; Cook, Becky ; Jeppson, Tamara ; Wolfson-Schwehr, Monica ; Sanada, Yoshinori ; Saito, Saneatsu ; Kido, Yukari ; Hirose, Takehiro ; Behrmann, Jan H. ; Ikari, Matt ; Ujiie, Kohtaro ; Rowe, Christie ; Kirkpatrick, James ; Bose, Santanu ; Regalla, Christine ; Remitti, Francesca ; Toy, Virginia ; Fulton, Patrick ; Mishima, Toshiaki ; Yang, Tao ; Sun, Tianhaozhe ; Ishikawa, Tsuyoshi ; Sample, James C ; Takai, Ken ; Kameda, Jun ; Toczko, Sean ; Maeda, Lena ; Kodaira, Shuichi ; Hino, Ryota ; Saffer, Demian. / Stress state in the largest displacement area of the 2011 Tohoku-Oki earthquake. In: Science. 2013 ; Vol. 339, No. 6120. pp. 687-690.

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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.",

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AU - Sun, Tianhaozhe

AU - Ishikawa, Tsuyoshi

AU - Sample, James C

AU - Takai, Ken

AU - Kameda, Jun

AU - Toczko, Sean

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