Results 71 to 80 of about 347 (171)

P wave anisotropic tomography of the Nankai subduction zone in Southwest Japan

Geochemistry, Geophysics, Geosystems, 2012
The active subduction of the young Philippine Sea (PHS) plate and the old Pacific plate has resulted in significant seismic heterogeneity and anisotropy in Southwest (SW) Japan. In this work we determined a detailed 3‐D P wave anisotropic tomography of the crust and upper mantle beneath SW Japan using ∼540,000 P wave arrival times from 5,249 local ...
Jian Wang, Dapeng Zhao
openaire   +1 more source

Epidote Records (De)hydration From the Seafloor Through Subduction and Underplating: Implications for Subduction Zone Fluid Budgets and Slow Slip

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract When, where, and how much fluid is released from subducting oceanic crust control deformation, element cycling, and magmatism in subduction zones. However, the palimpsest of tectonometamorphic processes in the exhumed rock record complicates the relation of geologic observations to geodynamic models of subduction fluid sources and transport ...
P. C. Lindquist, C. B. Condit, W. F. Hoover, V. E. Guevara, G. S. Epstein   +4 more
wiley   +1 more source

Revisiting interseismic deformation in Nankai: focusing on slip-deficit accumulation in the ETS zone and comparison with Cascadia

Earth, Planets and Space
Various stress-releasing phenomena, such as episodic tremor and slip (ETS) and low-frequency earthquakes, occur at the downdip seismogenic zone in southwest Japan.
Shaoyang Li, Ling Chen
doaj   +1 more source

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

Stochastic Emulation for Efficient Onshore Probabilistic Tsunami Hazard Assessment

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract Machine learning is emerging as a promising strategy for modeling tsunami inundation at reduced computational cost. To enable probabilistic outputs that capture emulator uncertainty, we employ an ensemble of stochastic encoder‐decoder emulators with dropout‐based stochastic forward pass.
Naveen Ragu Ramalingam, Alice Abbate, Erlend Briseid Storrøsten, Gareth Davies, Stefano Lorito, Manuela Volpe, Steven J. Gibbons, Fabrizio Romano, Finn Løvholt   +8 more
wiley   +1 more source

Geodetic Evidence of Time‐Dependent Viscoelastic Interseismic Deformation Driven by Megathrust Locking in the Southwest Japan Subduction Zone

Geophysical Research Letters, 2020
The time‐variable features of interseismic deformation in subduction zones are poorly understood and commonly ignored. Here, by incorporating century‐long leveling data and contemporary global navigation satellite systems (GNSS) velocities, we ...
Shaoyang Li, Jun'ichi Fukuda, Onno Oncken   +2 more
doaj   +1 more source

Prevalence of mud diapirs in the Hyuga-nada subduction zone, southwest Japan, and its implications on hydrogeological processes

Progress in Earth and Planetary Science
Mud volcanoes, common seafloor features in subduction zone forearcs, provide crucial insights into deep hydrogeological systems associated with plate subduction.
Ryuta Arai, Kazuya Shiraishi, Yasuyuki Nakamura, Gou Fujie, Arata Kioka, Masataka Kinoshita, Rina Fukuchi   +6 more
doaj   +1 more source

Detection of slow slip event lasting several months in the shallow region of the Suruga Trough, the eastern end of the Nankai Trough, Japan

Progress in Earth and Planetary Science
Numerous deep short-term slow slip events (S-SSEs) and long-term slow slip events (L-SSEs) have been detected in the Nankai Trough subduction zone in southwestern Japan based on Global Navigation Satellite System (GNSS) data.
Yuji Kikuchi, Yuta Mitsui, Masayuki Kano
doaj   +1 more source

Slip parameters on major thrusts at a convergent plate boundary: regional heterogeneity of potential slip distance at the shallow portion of the subducting plate

Earth, Planets and Space, 2018
Understanding variations of slip distance along major thrust systems at convergent margins is an important issue for evaluation of near-trench slip and the potential generation of large tsunamis.
Hideki Mukoyoshi, Shunya Kaneki, Tetsuro Hirono   +2 more
doaj   +1 more source

Time-dependent modeling of slow-slip events along the Nankai Trough subduction zone, Japan, within the 2018–2023 period

Earth, Planets and Space
According to a 2013 report by the Earthquake Research Committee of Japan, it was estimated that the probability of the occurrence of the next Nankai earthquake within the next three decades is 70–80%.
Shinzaburo Ozawa, Hiroshi Muneakane, Hisashi Suito   +2 more
doaj   +1 more source