Low Coseismic Friction on the Tohoku-Oki Fault Determined from Temperature Measurements.

Fulton, P. M., Brodsky, E. E., Kano, Y., Mori, J., Chester, F., Ishikawa, T., Harris, R. N., Lin, W., Eguchi, N., Toczko, S., Kyo, M., Namba, Y., Muraki, H., Kasaya, T., Conin, M., Moore, J. C., Nakamura, Y., Anderson , L., Cook, B., Jeppson, T., Wolfson-Schwehr, M., Sanada, Y., Saito, S., Kido, Y., Hirose, T., Behrmann, Jan H. , Ikari, M., Ujiie, K., Rowe, C., Kirkpatrick, J., Bose, S., Regalla, C., Remitti, F., Toy, V., Mishima, T., Yang, T., Sun, T., Sample, J., Takai, K., Kameda, J., Maeda, L., Kodaira, S., Hino, R. and Saffer, D. and Expedition 343, 343T, and KR13-08 Scientists (2013) Low Coseismic Friction on the Tohoku-Oki Fault Determined from Temperature Measurements. Science, 342 (6163). pp. 1214-1217. DOI 10.1126/science.1243641.

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The frictional resistance on a fault during slip controls earthquake dynamics. Friction dissipates heat during an earthquake; therefore, the fault temperature after an earthquake provides insight into the level of friction. The Japan Trench Fast Drilling Project (Integrated Ocean Drilling Program Expedition 343 and 343T) installed a borehole temperature observatory 16 months after the March 2011 moment magnitude 9.0 Tohoku-Oki earthquake across the fault where slip was ~50 meters near the trench. After 9 months of operation, the complete sensor string was recovered. A 0.31°C temperature anomaly at the plate boundary fault corresponds to 27 megajoules per square meter of dissipated energy during the earthquake. The resulting apparent friction coefficient of 0.08 is considerably smaller than static values for most rocks.

Document Type: Article
Additional Information: Additional Author notes (From: Suppl. material) The list of group author “Expedition 343, 343T, and KR13-08 scientists”: Masanori Kyo (CDEX-JAMSTEC, Japan), Yasuhiro Namba (CDEX-JAMSTEC, Japan), Hiroaki Muraki (Marine Works Japan, Japan), Takafumi Kasaya (JAMSTEC, Japan), Marianne Conin (CEREGE, France, now at UAG, LARGE, Guadeloupe, France), J. Casey Moore (University of California Santa Cruz), Yasuyuki Nakamura (JAMSTEC, Japan), Louise Anderson (University of Leicester, UK), Becky Cook (University of Southampton, UK), Tamara Jeppson (University of Wisconsin-Madison, USA), Monica Wolfson-Schwehr (University of New Hampshire, USA), Yoshinori Sanada (JAMSTEC, Japan), Saneatsu Saito (JAMSTEC, Japan), Yukari Kido (JAMSTEC, Japan), Takehiro Hirose (JAMSTEC, Japan), Jan H. Behrmann (GEOMAR, Germany), Matt Ikari (University of Bremen, Germany), Kohtaro Ujiie (University of Tsukuba, Japan), Christie Rowe (McGill University, Canada), James Kirkpatrick (Colorado State University, USA), Santanu Bose (University of Calcutta, India), Christine Regalla (The Pennsylvania State University, USA), Francesca Remitti (Universitá Modena e Reggio Emilia, Italy), Virginia Toy (University of Otago, New Zealand), Toshiaki Mishima (Osaka City University, Japan), Tao Yang (Institute of Geophysics, China Earthquake Administration, China), Tianhaozhe Sun (University of Victoria, Canada), James Sample (Northern Arizona University, USA), Ken Takai (JAMSTEC, Japan), Jun Kameda (Hokkaido University, Japan), Lena Maeda (JAMSTEC, Japan), Shuichi Kodaira (JAMSTEC,Japan), Ryota Hino (Tohoku University, Japan), Demian Saffer (The Pennsylvania State University, USA).
Keywords: IODP, Expedition 343, earthquake, Tohoku, Japan, fault, temperature, coseismic slip, model
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1126/science.1243641
ISSN: 0036-8075
Projects: Future Ocean
Date Deposited: 18 Dec 2013 10:58
Last Modified: 09 Sep 2016 11:21
URI: http://oceanrep.geomar.de/id/eprint/22654

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