Results 161 to 170 of about 1,202,006 (199)

Sediment strength contrasts and decollement localization in Nankai subduction zone

, 2010
We experimentally characterized the mechanical properties of marine sediments entering the Nankai Trough subduction zone (southwestern convergent margin of Japan). The mechanical tests, based on the independent application of isotropic confining Pc and pore pressure Pp, aimed at assessing both the poroelastic compressibility as well as the resistance ...
Raimbourg, Hugues, Ujiie, Kohtaro, Hamano, Yozo, Saito, Saneatsu, Kinoshita, Masataka, Kopf, Achim   +5 more
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Splay Fault Branching Along the Nankai Subduction Zone

Science, 2002
Seismic reflection profiles reveal steeply landward–dipping splay faults in the rupture area of the magnitude (M) 8.1 Tonankai earthquake in the Nankai subduction zone. These splay faults branch upward from the plate-boundary interface (that is, the subduction zone) at a depth of ∼10 kilometers, ∼50 to 55 kilometers landward of the trough axis ...
Jin-Oh, Park, Tetsuro, Tsuru, Shuichi, Kodaira, Phil R, Cummins, Yoshiyuki, Kaneda   +4 more
openaire   +2 more sources

Slow Earthquakes Linked Along Dip in the Nankai Subduction Zone

Science, 2010
Three types of temporally linked slow earthquakes may limit nearby buildup of stress.
Hitoshi, Hirose, Youichi, Asano, Kazushige, Obara, Takeshi, Kimura, Takanori, Matsuzawa, Sachiko, Tanaka, Takuto, Maeda   +6 more
openaire   +2 more sources

Interseismic deformation at the Nankai Trough, Japan, subduction zone

Journal of Geophysical Research: Solid Earth, 1992
Uplift along the coast of southwestern Japan following the 1944 Tonankai (Ms = 8.0) and 1946 Nankaido (Ms = 8.2) earthquakes has been inferred from the 1950–1985 tide gage records. Although uplift rates vary with geographic position, the temporal dependence at each site can be described as the superposition of an exponentially decaying (time constant ...
J. C. Savage, W. Thatcher
openaire   +1 more source

A low-velocity zone with weak reflectivity along the Nankai subduction zone

Geology, 2010
Three-dimensional seismic reflection data reveal the presence of a low seismic velocity zone (LVZ) with weak reflectivity character along the Nankai accretionary prism. This LVZ is intercalated between an upper, offscraped layer and a lower, underthrusting layer in the outer accretionary wedge.
Jin-Oh Park, Gou Fujie, Lalith Wijerathne, Takane Hori, Shuichi Kodaira, Yoshio Fukao, Gregory F. Moore, Nathan L. Bangs, Shin'ichi Kuramoto, Asahiko Taira   +9 more
openaire   +1 more source

Acoustic Waveform Tomography of OBS data in the Nankai subduction zone

SEG Technical Program Expanded Abstracts 2010, 2010
Acoustic waveform tomography was applied to Ocean Bottom seismograph data acquired in the seismogenic Nankai subduction zone. To reduce artifacts arising from elastic effects, the inversion focused on early arrivals, and was conducted in two steps; i) fitting phase information, and ii) the incorporation of amplitude information. Image sources were used
Rie Kamei, R. Gerhard Pratt
openaire   +1 more source

Historical activity of an onshore subduction thrust and related geomorphic changes, northeastern Nankai subduction zone

2023
We show new geomorphic and geologic evidence for historical activity of the onshore deformation front of the Nankai subduction zone, constrained by Holocene tectonic geomorphology, high-resolution borehole stratigraphy, and seismic reflection profile.  Borehole transect across a newly recognized late Holocene fold scarp contains middle to late
Tatsuya Ishiyama, Toshimichi Nakanishi, Daisuke Hirouchi, Nobuhisa Matsuta, Naoko Kato, Hiroshi Sato   +5 more
openaire   +1 more source

Deformation and stress localization at the Nankai subduction zone, southwest Japan

Earth and Planetary Science Letters, 2003
Abstract Deformation observed at subduction zones provides direct information on kinematics/mechanics of plate interaction. Previous analysis of GPS (global positioning system) observations at Japan subduction zones mainly focused on the pattern of deformation or strain, and did not attempt to assess stress change associated with plate subduction. In
S. Zhao, X. Wu, T. Hori, A. Smith, Y. Kaneda, S. Takemoto   +5 more
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Waveform tomography imaging of a megasplay fault system in the seismogenic Nankai subduction zone

Earth and Planetary Science Letters, 2011
Abstract We apply Frequency-domain Waveform Tomography to form quantitative, high-resolution P-wave velocity images of a megasplay fault system within the central Nankai subduction zone offshore of southwest Japan, using controlled source Ocean Bottom Seismometer (OBS) data originally acquired in 2004. The Waveform Tomography method exploits recorded
Rie Kamei, R. Gerhard Pratt, Takeshi Tsuji   +2 more
openaire   +1 more source

The slip deficit rate, slow and fast earthquake at the Nankai subduction zone.

2023
The Nankai subduction zone is considered as a region with a high seismic risk. Large earthquakes with magnitudes larger than 8 have occurred and will recur in the future. Additionally, several observations of slow earthquakes at the shallow and deep plate interface have continuously been being happening.
Raymundo Omar Plata Martinez, Takeshi Iinuma, Fumiaki Tomita, Takuya Nishimura3, Takane Hori   +4 more
openaire   +1 more source