Results 31 to 40 of about 350 (172)

Geological record of prehistoric tsunamis in Mugi town, facing the Nankai Trough, western Japan

Progress in Earth and Planetary Science, 2019
Stratigraphic and paleontological investigations in Mugi Town, on the Pacific coast of Shikoku Island, revealed evidence of as many as five tsunami inundations from events along the Nankai Trough between 5581 and 3640 cal yr BP.
Yumi Shimada, Shigehiro Fujino, Yuki Sawai, Koichiro Tanigawa, Dan Matsumoto, Arata Momohara, Megumi Saito-Kato, Masaki Yamada, Eri Hirayama, Takahiro Suzuki, Catherine Chagué   +10 more
doaj   +1 more source

Capturing 50 Years of Postseismic Mantle Flow at Nankai Subduction Zone [PDF]

Journal of Geophysical Research: Solid Earth, 2018
AbstractWe combine Global Positioning System, leveling, and tide gauge records of vertical motion in southwest Japan spanning postseismic deformation following the 1944 M8.1 Tonankai and 1946 M8.4 Nankai earthquakes. Continuous tide gauge records from 1950 to 2015 are combined with leveling data recorded from 1947 to 1980 and Global Positioning System ...
Kaj M. Johnson, Douglas Tebo
openaire   +1 more source

Filling the Gap in Cascadia: The Emergence of Low‐Amplitude Long‐Term Slow Slip

Geochemistry, Geophysics, Geosystems, 2021
Long‐term slow slip events have been observed at several subduction zones around the globe, where they play an integral part in strain release along megathrust faults.
Carolyn P. Nuyen, David A. Schmidt
doaj   +1 more source

ICDP Workshop on Borehole Monitoring at the Nankai Subduction Zone: Building a Land-Ocean Borehole Network to Study the Seismogenic Zone [PDF]

Scientific Drilling, 2008
Examples of subduction processes are currently investigated　around the Kii Peninsula, Honshu Island by Japanese　as well as　international projects. The most well-known is the　NanTroSEIZE project conducted by the Integrated Ocean　Drilling Program (IODP ...
Takeshi Sagiya
doaj   +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

Probabilistic tsunami hazard assessment based on the Gutenberg–Richter law in eastern Shikoku, Nankai subduction zone, Japan

Earth, Planets and Space, 2022
Earthquake and tsunami predictions comprise huge uncertainties, thus necessitating probabilistic assessments for the design of defense facilities and urban planning.
Toshitaka Baba, Masato Kamiya, Naoki Tanaka, Yusuke Sumida, Ryoichi Yamanaka, Kojiro Watanabe, Hiroyuki Fujiwara   +6 more
doaj   +1 more source

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

Detailed Shallow Shear Velocity Structure in the Nankai Trough From Ambient Noise Differential Adjoint Tomography: Implications for Earthquake Generation Mechanisms

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Seismic and aseismic slip has been reported in the Nankai Trough. In this study we apply ambient noise differential adjoint tomography to obtain a high‐resolution S‐wave velocity (Vs) model in the Nankai Trough. The Vs in the very shallow imbricate thrust zone is higher than that on both the seaward and landward sides.
Lina Gao, Xin Liu, Ayako Nakanishi, Haoran Meng, Xi Wang, Zhanwen Li, Gou Fujie   +6 more
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

Sustainable thermogenic CH4 and H2 generation in the Nankai Trough subduction zone

, 2023
Abstract Mud volcanoes, gas plumes, and gas hydrates comprising thermogenic and biogenic CH4 are widely distributed in the Nankai Trough subduction zone, showing ongoing significant CH4 activity. However, the source rocks of the thermogenic CH4 and the geological source of H2 for microbial CH4 production remain uncertain.
Noriyuki Suzuki, Koutaro Koike, Jun Kameda, Gaku Kimura   +3 more
openaire   +1 more source