Results 71 to 80 of about 6,044 (217)

Prolonged Hypocenter Migration in a Lower‐Crustal Earthquake Swarm in Japan: Positive Feedback Between Heat Influx and Fluid Production

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract The Yamaguchi earthquake swarm in western Japan occurred at unusually deep depths (25–40 km), well below the seismogenic zone, and exhibited prolonged zigzag hypocenter migrations over at least ∼180 days. Seismicity initiated in the southwestern part of the swarm area, followed by systematic migration eastward, northeastward, and northwestward.
Junichi Nakajima, Kazuki Miyazaki, Nobuaki Suenaga, Shintaro Azuma, Shoichi Yoshioka   +4 more
wiley   +1 more source

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

, 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.
Kutterolf, Steffen, Murray, Richard W., Schindlbeck, Julie Christin, Scudder, Rachel P., Underwood, Michael B., Wang, Kuo-Lung   +5 more
core   +1 more source

Thick slab crust with rough basement weakens interplate coupling in the western Nankai Trough

Earth, Planets and Space
The westernmost Nankai Trough, southwest Japan, exhibits a rapid along-strike reduction in plate coupling in the proximity to the subducting Kyushu-Palau ridge. Yet how and to what extent the ridge subduction impacts physical properties at the megathrust
Ryuta Arai, Kazuya Shiraishi, Yasuyuki Nakamura, Gou Fujie, Seiichi Miura, Shuichi Kodaira, Dan Bassett, Tsutomu Takahashi, Yuka Kaiho, Yohei Hamada, Kimihiro Mochizuki, Rie Nakata, Masataka Kinoshita, Yoshitaka Hashimoto, Kyoko Okino   +14 more
doaj   +1 more source

Simulation of wellbore construction in offshore unconsolidated methane hydrate-bearing formation [PDF]

, 2018
The unconsolidated nature of offshore methane hydrate-bearing formation poses challenges to sustainable methane gas production as the weak formation is susceptible to disturbance during wellbore construction.
Elshafie, MZEB, Sasaki, T, Soga, K
core   +1 more source

Interpretation of porosity and LWD resistivity from the Nankai accretionary wedge in light of clay physicochemical properties: Evidence for erosion and local overpressuring [PDF]

, 2011
International audienceIn this study, we used porosity to assess the compaction state of the Nankai accretionary wedge sediments and any implications for stress and pore pressure.
Archie, Bangs, Bourlange, Bray, Brown, Bussian, Chang, Clavier, Colten-Bradley, Dahlen, Doan, Glover, Gordon, H. Raimbourg, Hart, Hashimoto, Henry, Henry, Henry, Hubbert, Karig, Kinoshita, Le Pichon, Leroy, M. Conin, Miyazaki, Moore, Moore, Moore, Moore, Orsini, P. Henry, Park, Raimbourg, Ransom, Revil, Rubey, S. Bourlange, Saffer, Scholz, Screaton, Screaton, Sen, Seno, Song, Strasser, T. Reuschlé, Underwood   +47 more
core   +4 more sources

Detection of Shallow Tectonic Tremors in Hyuga‐nada, Nankai Trough, Using the Newly Established N‐Net OBS Network

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Monitoring tectonic tremors is crucial for understanding stress release in subduction zones and assessing megathrust earthquake risk. The Hyuga‐nada region, at the western edge of the Nankai Trough, Japan, provides a natural laboratory for investigating links among slow earthquakes, megathrust events, and complex subduction structures.
Kodai Sagae, Masayuki Kano, Suguru Yabe, Takahiko Uchide   +3 more
wiley   +1 more source

Geologic evidence for coseismic uplift at ~ AD 400 in coastal lowland deposits on the Shimizu Plain, central Japan

Progress in Earth and Planetary Science, 2019
Megathrust earthquakes of magnitude ~ 8 and ensuing large tsunamis occur along the Nankai and Suruga troughs, central Japan, with a recurrence interval of 90–270 years since an AD 684 Hakuho earthquake.
Akihisa Kitamura, Tomoya Ina, Daisuke Suzuki, Keito Tsutahara, Daisuke Sugawara, Kazuyoshi Yamada, Akira Aoshima   +6 more
doaj   +1 more source

Upper Mantle Heterogeneity and Weak Subduction Boundaries Control Crustal Stress in the Korean Peninsula

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Most earthquakes occur at plate boundaries, but some also strike within stable continental interiors. Although dominant causes of such intraplate earthquakes remain elusive, a prevailing hypothesis attributes intraplate stress and seismicity to variations in lithospheric thickness.
Sungho Lee, Chang Soo Cho, YoungHee Kim, Youngsang Kwon, Eunseo Choi   +4 more
wiley   +1 more source

Acoustic and mechanical properties of Nankai accretionary prism core samples [PDF]

, 2011
International audienceWe studied undeformed sediment and accreted strata recently recovered by Ocean Drilling Program/Integrated Ocean Drilling Program (ODP/IODP) drilling in Nankai Trough convergent margin to unravel the changes in physical properties ...
Achim Kopf, Athy, Bachman, Bangs, Bangs, Bangs, Best, Bourlange, Brace, Brace, Bray, Brown, Brückmann, Brückmann, Burland, Byrne, Casagrande, Conin, Dvorkin, Dvorkin, Erickson, Expedition 314 Scientists, Expedition 315 Scientists, Expedition 315 Scientists, Expedition 315 Scientists, Expedition 316 Scientists, Expedition 316 Scientists, Feeser, Fofonoff, Gassmann, Gettemy, Goldberg, Gorgas, Hamilton, Hamilton, Hamilton, Hamilton, Hoffman, Hugues Raimbourg, Hyndman, Johns, Karig, Karig, Karig, Karig, Kibblewhite, Knauss, Lee, Leroueil, Masataka Kinoshita, Mavko, Moore, Moore, Moore, Moran, Morgan, Nur, Park, Robb, Saffer, Saffer, Saffer, Saffer, Saneatsu Saito, Screaton, Shipboard Scientific Party, Shipboard Scientific Party, Shipboard Scientific Party, Silva, Spinelli, Steurer, Sunderland, Taira, Tobin, Tobin, Tobin, Tobin, Ujiie, Underwood, Urmos, Vernik, Vrolijk, Wetzel, Wetzel, Wilkens, Wood, Yozo Hamano   +86 more
core   +3 more sources

Splay Fault Permeability Governs Fluid–Structure Interaction in Accretionary Wedges

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Interactions between upper plate deformation and plate interface seismicity in subduction zones remain poorly understood, but growing evidence indicates that fluid flow along splay faults modulates upper‐plate faulting. Field observations from two exhumed splay faults define end‐member scenarios where impermeable faults trap fluids in their ...
Joaquin Julve, Åke Fagereng, Giovanni Toffol, Kohtaro Ujiie   +3 more
wiley   +1 more source