Results 51 to 60 of about 3,084 (214)

Depth‐dependent mode of tremor migration beneath Kii Peninsula, Nankai subduction zone [PDF]

Geophysical Research Letters, 2012
We investigated the migration mode of deep non‐volcanic tremor activity beneath Kii Peninsula, southwest Japan. Major tremor episodes are characterized by long‐term migration with a velocity of about 10 km/day, propagating along the strike of the subducting plate.
Kazushige Obara, Takanori Matsuzawa, Sachiko Tanaka, Takuto Maeda   +3 more
openaire   +1 more source

Long-term slow slip events along the Nankai trough delayed by the 2016 Kumamoto earthquake, Japan

Earth, Planets and Space, 2020
The Global Navigation Satellite System network in Japan detected transient crustal deformation along the Nankai trough, Japan, from June 2018. Time-dependent inversion analysis shows that a long-term slow slip event in northern Hyuga-nada Sea along the ...
Shinzaburo Ozawa, Ryouji Kawabata, Kensuke Kokado, Hiroshi Yarai   +3 more
doaj   +1 more source

Release of mineral-bound water prior to subduction tied to shallow seismogenic slip off Sumatra [PDF]

, 2017
Plate-boundary fault rupture during the 2004 Sumatra-Andaman subduction earthquake extended closer to the trench than expected, increasing earthquake and tsunami size.
Abby R. Kenigsberg, Andre Hüpers, Bjorlykke, Brandon Dugan, Brian M. House, Farid Chemale, Freya L. Mitchison, Gilles Guèrin, Hideki Mukoyoshi, Hugo F. A. Pouderoux, Insun Song, Jan Backman, Katerina E. Petronotis, Kevin T. Pickering, Kitty L. Milliken, Lisa C. McNeill, Manheim, Mari Hamahashi, Marina C. G. Frederik, Marta E. Torres, Mebae Kuranaga, Nisha Nair, Paola Vannucchi, Peter J. Vrolijk, Sarah Kachovich, Satoko Owari, Steffen Kutterolf, Sylvain Bourlange, Tamara N. Jeppson, Tao Yang, Timothy J. Henstock, Tobias A. Colson, Vacquier, Wenhuang Chen, Xixi Zhao, Yehua Shan   +35 more
core   +5 more sources

Near-Field Body-Wave Extraction From Ambient Seafloor Noise in the Nankai Subduction Zone

Frontiers in Earth Science, 2021
Ambient noise correlation is capable of retrieving waves propagating between two receivers. Although waves retrieved using this technique are primarily surface waves, the retrieval of body waves, including direct, refracted, and reflected waves, has also
Takashi Tonegawa, Toshinori Kimura, Eiichiro Araki   +2 more
doaj   +1 more source

In situ stress magnitude and rock strength in the Nankai accretionary complex: a novel approach using paired constraints from downhole data in two wells [PDF]

, 2016
We present a method to simultaneously constrain both far-field horizontal stress magnitudes (S hmin and S Hmax) and in situ rock unconfined compressive strength (UCS), using geophysical logging data from two boreholes located 70 m apart that access the ...
Dugan, B., Huffman, K.A., Saffer, D.M.
core   +1 more source

Evolution of Pore Fluid Pressure in an Accretionary Outer Wedge Over Megathrust Earthquake Cycles: The Northern Cascadia Example

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
The evolution of pore fluid pressure ( Pf$P_{\mathrm{f}}$) in the most seaward portion of a subduction accretionary prism plays an essential role in the cycle of tsunamigenic earthquakes. Based on recent geophysical observations, here we propose a testable conceptual model for this evolution for northern Cascadia offshore of Washington.
Tianhaozhe Sun, Kelin Wang
wiley   +1 more source

Thermogenic methane and hydrogen generation in subducted sediments of the Nankai Trough

Communications Earth & Environment
Active and widespread CH4 accumulations and emissions in the Nankai Trough subduction zone are attested by numerous mud volcanoes, gas plumes, and gas hydrates containing biogenic and thermogenic CH4.
Noriyuki Suzuki, Koutaro Koike, Jun Kameda, Gaku Kimura   +3 more
doaj   +1 more source

Tsunamigenic Earthquakes at Along-dip Double Segmentation and Along-strike Single Segmentation near Japan

Journal of Marine Science and Engineering, 2015
A distinct difference of the earthquake activity in megathrust subduction zones is pointed out, concerning seismic segmentations in the vicinity of Japan—that is, the apparent distribution of earthquake hypocenters characterized by Along-dip Double ...
Junji Koyama, Motohiro Tsuzuki, Kiyoshi Yomogida   +2 more
doaj   +1 more source

構造研究に基づく南海トラフ（西部）地震発生帯のプレート形状および速度構造の3次元モデル [PDF]

, 2013
Great interplate earthquakes have repeatedly occurred in pairs along the Nankai Trough. In order to reduce a great deal of damage to coastal area from both strong ground motion and tsunami generation, it is necessary to understand rupture synchronization
KANEDA, Yoshiyuki, KODAIRA, Shuichi, NAKANISHI, Ayako, OBANA, Koichiro, SHIMOMURA, Norio, SHIOMI, Katsuhiko, TAKAHASHI, Narumi, TAKAHASHI, Tsutomu, TAKEDA, Tetsuya, UENO, Tomotake, YAMAMOTO, Yojiro, YAMASHITA, Mikiya, 上野, 友岳, 下村, 典生, 仲西, 理子, 小平, 秀一, 尾鼻, 浩一郎, 山下, 幹也, 山本, 揚二朗, 武田, 哲也, 汐見, 勝彦, 金田, 義行, 高橋, 努, 高橋, 成実   +23 more
core  

Fault Volume Digital Twin to Reproduce the Full Slip Spectrum, Scaling, and Statistical Laws

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract Seismological and geodetic observations of fault zones reveal diverse slip dynamics, scaling, and statistical laws. Existing mechanisms explain some but not all of these behaviors. We show that incorporating an off‐fault damage zone—characterized by distributed fractures surrounding a main fault—can reproduce many key features observed in ...
M. Almakari, N. Kheirdast, C. Villafuerte, M. Y. Thomas, P. Dubernet, J. Cheng, A. Gupta, P. Romanet, S. Chaillat, H. S. Bhat   +9 more
wiley   +1 more source