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      Structural Characteristics of the Nankai Trough Shallow Plate Boundary Inferred From Shallow Very Low Frequency Earthquakes

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          Generic Mapping Tools: Improved Version Released

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            Source mechanisms and tectonic significance of historical earthquakes along the nankai trough, Japan

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              Propagation of slow slip leading up to the 2011 M(w) 9.0 Tohoku-Oki earthquake.

              Many large earthquakes are preceded by one or more foreshocks, but it is unclear how these foreshocks relate to the nucleation process of the mainshock. On the basis of an earthquake catalog created using a waveform correlation technique, we identified two distinct sequences of foreshocks migrating at rates of 2 to 10 kilometers per day along the trench axis toward the epicenter of the 2011 moment magnitude (M(w)) 9.0 Tohoku-Oki earthquake in Japan. The time history of quasi-static slip along the plate interface, based on small repeating earthquakes that were part of the migrating seismicity, suggests that two sequences involved slow-slip transients propagating toward the initial rupture point. The second sequence, which involved large slip rates, may have caused substantial stress loading, prompting the unstable dynamic rupture of the mainshock.
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                Author and article information

                Journal
                Geophysical Research Letters
                Geophys. Res. Lett.
                American Geophysical Union (AGU)
                0094-8276
                1944-8007
                April 24 2019
                April 28 2019
                April 17 2019
                April 28 2019
                : 46
                : 8
                : 4192-4201
                Affiliations
                [1 ]National Research Institute for Earth Science and Disaster Resilience Tsukuba Japan
                [2 ]Now at Earthquake Research InstituteThe University of Tokyo Tokyo Japan
                [3 ]Japan Agency for Marine‐Earth Science and Technology Yokohama Japan
                Article
                10.1029/2019GL082448
                73e80ad7-a0dc-4859-91bf-406da3b2fb6f
                © 2019

                http://creativecommons.org/licenses/by-nc-nd/4.0/

                http://creativecommons.org/licenses/by-nc-nd/4.0/

                http://doi.wiley.com/10.1002/tdm_license_1.1

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