Results 141 to 150 of about 347 (171)

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
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Temperature control on deep tectonic tremor belt in the Nankai subduction zone

2022
Deep tectonic tremors occur in the Nankai subduction zone, defining a belt-like zone with a width of a few ten km located at depths between 30 and 55 km along upper surface of the subducting Philippine sea slab. We interpret the geometry of the tremor belt based on temperature calculations.
Ryoya Ikuta, Yui Kobayashi, Riko Arai, Tatsuhiko Kawamoto   +3 more
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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
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Forecast model for great earthquakes at the Nankai Trough subduction zone

pure and applied geophysics, 1988
An earthquake instability model is formulated for recurring great earthquakes at the Nankai Trough subduction zone in southwest Japan. The model is quasistatic, two-dimensional, and has a displacement and velocity dependent constitutive law applied at the fault plane.
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Imaging Interseismic Locking at the Nankai Subduction Zone, Southwest Japan

2009
Recent geodetic and seismological observations have revealed that brittle-plastic transition zones at subduction zone interfaces are loci of slow slip episodes and nonvolcanic harmonic tremors. It is therefore important to estimate the depth range of brittle-plastic transition zones and how interplate locking changes with space and time within the ...
Yosuke Aoki, Christopher H. Scholz
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Submarine landslide potential near the megasplay fault at the Nankai subduction zone

Earth and Planetary Science Letters, 2011
Abstract We investigate the mechanics of slope failures on the Nankai accretionary complex offshore Japan in the vicinity of a major out-of-sequence thrust fault (termed the “megasplay”). Incorporating laboratory-measured shear strength of slope sediments sampled during Integrated Ocean Drilling Project (IODP) Expeditions 315 and 316 with local ...
Matt J. Ikari, Michael Strasser, Demian M. Saffer, Achim J. Kopf   +3 more
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Locating boundaries between locked and creeping regions at Nankai and Cascadia subduction zones

Journal of Geophysical Research: Solid Earth
Interseismic coupling maps and, especially, estimates of the location of the fully coupled (locked) zone relative to the trench, coastline, and slow slip events are crucial for determining megathrust earthquake hazard at subduction zones. We present a physically motivated interseismic coupling inversion that explicitly incorporates locked zones with ...
E. M. Sherrill, K. M. Johnson, N. M. Jackson   +2 more
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Imaging of the subducted Kyushu-Palau Ridge in the Hyuga-nada region, western Nankai Trough subduction zone

Tectonophysics, 2013
Abstract We performed 3D seismic tomography of the Hyuga-nada region, western Nankai subduction zone, to investigate the relationship of the subducted part of Kyushu-Palau Ridge (KPR) to coseismic rupture propagation, seismicity, and shallow very low frequency earthquakes.
Yojiro Yamamoto, Koichiro Obana, Tsutomu Takahashi, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda   +5 more
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Interseismic uplift at the Nankai subduction zone, southwest Japan, 1951–1990

Journal of Geophysical Research: Solid Earth, 1995
Uplift as a function of time from 1951 through 1990 has been deduced from annual mean sea level measured at 15 tide gages along the Nankai subduction zone, southwest Japan. The recurrence interval for rupture of the Nankai subduction zone is about 100 years, and the most recent rupture was in late 1946.
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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
openaire   +1 more source