Results 11 to 20 of about 350 (172)

Long-term Monitoring in Deep Boreholes in the Nankai Subduction Zone [PDF]

Scientific Drilling, 2007
No abstract available.
Hisao Ito
doaj   +6 more sources

Weakening behavior of the shallow megasplay fault in the Nankai subduction zone

Earth, Planets and Space, 2022
The Nankai Trough megasplay fault hosts diverse modes of fault slip, ranging from slow slip events to megathrust earthquakes, and is responsible for related phenomena such as tsunamis and submarine landslides.
Alexander Roesner, Matt J. Ikari, Andre Hüpers, Achim J. Kopf   +3 more
doaj   +2 more sources

Deformation Process and Mechanism of the Frontal Megathrust at the Nankai Subduction Zone

Geochemistry, Geophysics, Geosystems, 2022
The frontal megathrust of the Nankai Trough subduction zone is recognized as a seismogenic fault based on a record of frictional heating, but the underlying micromechanical processes that act on the fault surface are poorly known. Here we present a layer
Gaku Kimura, Yohei Hamada, Suguru Yabe, Asuka Yamaguchi, Rina Fukuchi, Yukari Kido, Lena Maeda, Sean Toczko, Hanaya Okuda, Nobuhiro Ogawa, Hitoshi Morioka, Kohtaro Ujiie, Demian Saffer   +12 more
doaj   +2 more sources

Ambient seafloor noise excited by earthquakes in the Nankai subduction zone. [PDF]

Nat Commun, 2015
AbstractExcitations of seismic background noises are mostly related to fluid disturbances in the atmosphere, ocean and the solid Earth. Earthquakes have not been considered as a stationary excitation source because they occur intermittently. Here we report that acoustic-coupled Rayleigh waves (at 0.7–2.0 Hz) travelling in the ocean and marine sediments,
Tonegawa T, Fukao Y, Takahashi T, Obana K, Kodaira S, Kaneda Y.   +5 more
europepmc   +4 more sources

Temperature limits to deep subseafloor life in the Nankai Trough subduction zone [PDF]

Science, 2020
Deep, hot, and more alive than we thought Marine sediments represent a massive microbial ecosystem, but we still do not fully understand what factors shape and limit life underneath the seafloor. Analyzing samples from a subduction zone off the coast of Japan, Heuer et al.
Verena B. Heuer, Fumio Inagaki, Yuki Morono, Yusuke Kubo, Arthur J. Spivack, Bernhard Viehweger, Tina Treude, Felix Beulig, Florence Schubotz, Satoshi Tonai, Stephen A. Bowden, Margaret Cramm, Susann Henkel, Takehiro Hirose, Kira Homola, Tatsuhiko Hoshino, Akira Ijiri, Hiroyuki Imachi, Nana Kamiya, Masanori Kaneko, Lorenzo Lagostina, Hayley Manners, Harry-Luke McClelland, Kyle Metcalfe, Natsumi Okutsu, Donald Pan, Maija J. Raudsepp, Justine Sauvage, Man-Yin Tsang, David T. Wang, Emily Whitaker, Yuzuru Yamamoto, Kiho Yang, Lena Maeda, Rishi R. Adhikari, Clemens Glombitza, Yohei Hamada, Jens Kallmeyer, Jenny Wendt, Lars Wörmer, Yasuhiro Yamada, Masataka Kinoshita, Kai-Uwe Hinrichs   +42 more
openaire   +7 more sources

An inhomogeneous across-slab conduit controlled by intraslab stress heterogeneity in the Nankai subduction zone. [PDF]

Sci Rep, 2019
AbstractNonvolcanic, deep low-frequency tremors and slow-slip events occur simultaneously in the transition zone from locked to continuously creeping fault in the down-dip portion of the Nankai Trough subduction zone, southwestern Japan. The occurrence of these slow earthquakes is discontinuous along the trench and attributed to the effect of high pore
Otsubo M, Miyakawa A, Katayama I, Okazaki K.   +3 more
europepmc   +4 more sources

Fluid migration before and during slow earthquakes in the shallow Nankai subduction zone [PDF]

Journal of Geophysical Research: Solid Earth, 2021
Fluid migration in subduction zones is a key controlling factor of slow and megathrust earthquakes at plate boundaries. During the migration, seismic velocity and heterogeneous structures in its pathways may be temporarily varied, preferably triggering slow earthquakes.
Takashi Tonegawa, Shunsuke Takemura, Suguru Yabe, Kiyoshi Yomogida   +3 more
openaire   +2 more sources

Distribution of dehalogenation activity in subseafloor sediments of the Nankai Trough subduction zone [PDF]

Philosophical Transactions of the Royal Society B: Biological Sciences, 2013
Halogenated organic matter buried in marine subsurface sediment may serve as a source of electron acceptors for anaerobic respiration of subseafloor microbes. Detection of a diverse array of reductive dehalogenase-homologous ( rdhA ) genes suggests that subseafloor organohalide-respiring ...
Taiki, Futagami, Yuki, Morono, Takeshi, Terada, Anna H, Kaksonen, Fumio, Inagaki   +4 more
openaire   +2 more sources

Sedimentary inputs to the Nankai subduction zone: The importance of dispersed ash [PDF]

Geosphere, 2018
We examine the importance of dispersed volcanic ash as a critical component of the aluminosilicate sediment entering the Nankai Trough, located south of Japan’s island of Honshu, via the subducting Philippine Sea plate. Multivariate statistical analyses of an extensive major, trace, and rare earth element data set from bulk sediment and discrete ash ...
Rachel P. Scudder, Richard W. Murray, Steffen Kutterolf, Julie C. Schindlbeck, Michael B. Underwood, Kuo-Lung Wang   +5 more
openaire   +3 more sources

The First D/V Chikyu IODP Operations: Successful Logging and Coring During NanTroSEIZE Stage 1 Expeditions [PDF]

Scientific Drilling, 2008
The Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) is a multi-expedition IODP drilling project aimed at drilling, coring, logging, and instrumenting the seismogenic zone of an active subduction margin , in a region thought to generate megathrust
Moe Kyaw Thu, Daniel Curewitz, Shin’ichi Kuramoto, Hideki Masago   +3 more
doaj   +1 more source