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Tomography of the source zone of the great 2011 Tohoku earthquake by Hua, Yuanyuan; Zhao, Dapeng; Toyokuni, Genti; Xu, Yixian is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Tomography of the source zone of the great 2011 Tohoku earthquake about?

The mechanism and rupture process of the giant 2011 Tohoku-oki earthquake (Mw 9.0) are still poorly understood due to lack of permanent near-field observations. Using seismic arrival times recorded by dense seismograph networks on land and at ocean floor, we determine a detailed seismic tomography model of the megathrust zone beneath the Tohoku forearc. Our results show that the coseismic slip of the 2011 Tohoku-oki earthquake initiated at a boundary between a down-dip high-velocity anomaly and an up-dip low-velocity anomaly. The slow anomaly at shallow depths near the Japan trench may reflect low-rigidity materials that are close to the free surface, resulting in large slip and weak high-frequency radiation. Our new tomographic model can account for not only large slip near the trench but also weak high-frequency radiation from the shallow rupture areas.

Who reads Tomography of the source zone of the great 2011 Tohoku earthquake?

Author

Hua, Yuanyuan; Zhao, Dapeng; Toyokuni, Genti; Xu, Yixian

Publisher

Nature Publishing Group; Springer Science and Business Media LLC; [London]: Nature Publishing Group, 2010-; Society for Mining, Metallurgy and Exploration Inc.; Research Square (ISSN 2041-1723)

Published

2020

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)