Results 1 to 10 of about 3,008 (198)

Shear-wave anisotropy beneath the Ryukyu arc [PDF]

Earth, Planets and Space, 2009
Abstract We have investigated regional shear-wave splitting beneath the Ryukyu arc in order to clarify the mantle flow beneath the Ryukyu arc and compare it with the extension of the Okinawa Trough. The splitting of regional shear waves (direct S) in the central and southern Ryukyu arc regions was analyzed in terms of fast-polarization ...
Nakamura, Mamoru, Yamamoto, Ai
core   +3 more sources

Large-scale slope failure and active erosion occurring in the southwest Ryukyu fore-arc area [PDF]

Natural Hazards and Earth System Sciences, 2001
The southwestern Ryukyu area east of Taiwan Island is an arcuate boundary between Philippine Sea Plate and Eurasian Plate. The topographic features in the area are characterised by (1) a large-scale amphitheatre off Ishigaki Island, just on the ...
T. Matsumoto, M. Kimura, M. Nakamura, T. Ono   +3 more
doaj   +4 more sources

Effects of a Whole Plant Extract of Scutellaria rubropunctata var. rubropunctata on Bone Metabolism with Estrogen Receptor Activation [PDF]

Plants, 2022
We screened natural resources for estrogen receptor (ER)-activating and bone metabolism-promoting activities with the aim of finding potential treatments for osteoporosis. A screen of 1531 extracts from Ryukyu Arc plants using a luciferase reporter assay
Misaki Watanabe, Tadahiro Yahagi, Takahiro Shirayama, Katsunori Miyake, Hitoshi Kotani, Takuya Ogawa, Keiichi Matsuzaki   +6 more
doaj   +2 more sources

Potential coupling of microbial methane, nitrogen, and sulphur cycling in the Okinawa Trough cold seep sediments [PDF]

Microbiology Spectrum
The Okinawa Trough (OT) is a back-arc basin with a wide distribution of active cold seep systems. However, our understanding of the metabolic function of microbial communities in the cold seep sediments of the OT remains limited.
Ye Chen, Xiyang Dong, Zhilei Sun, Cuiling Xu, Xilin Zhang, Shuangshuang Qin, Wei Geng, Hong Cao, Bin Zhai, Xuecheng Li, Nengyou Wu   +10 more
doaj   +2 more sources

Earthquake‐Related Structures Beneath the Southernmost Portion of the Ryukyu Arc and Forearc

Geophysical Research Letters, 2019
AbstractModerate to large earthquakes repeatedly occur beneath the southernmost Ryukyu arc and forearc, but the seismogenic structures were poorly studied. To better understand the southernmost Ryukyu seismogenic structures, we have deployed ocean bottom seismometers to record the aftershocks of a large earthquake in 2015.
Shiou-Ya Wang, Shu-Kun Hsu, Yi-Ching Yeh   +2 more
exaly   +2 more sources

Review of Subsurface Dam Technology Based on Japan’s Experience in the Ryukyu Arc

Water (Switzerland)
Based on the success of an irrigation project that utilized two subsurface dams as water sources on Miyako Island, ten additional subsurface dams have now been completed. The technologies that have made the giant subterranean dam possible are the integrated storage model for creating water utilization plans and the Soil Mixed Wall method for ...
exaly   +2 more sources

Okinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS [PDF]

Podzemni Radovi, 2021
This paper presents using GDAL utilities and GRASS GIS for topographic analysis of the raster grids based on GEBCO DEM as NetCDF file at 15 arc-second intervals.
Lemenkova Polina
doaj   +1 more source

Middle Miocene forearc alkaline magmatism in Amami-Oshima Island, central Ryukyu Arc: implications for paleoreconstruction of Shikoku Basin

Earth, Planets and Space, 2023
During the middle Miocene, forearc alkaline magmatism occurred in the Outer Zone of Southwest Japan and the northern Ryukyu Arc, resulting in the formation of forearc alkaline basaltic rocks with ocean island basalt (OIB)-like chemical signatures.
Ginta Motohashi, Osamu Ishizuka, Hirokuni Oda, Takashi Sano, Shun Sekimoto, Kohtaro Ujiie   +5 more
doaj   +1 more source

Gravity inversion constrained by OBS receiver function reveals crustal structure in Ryukyu Trench

Frontiers in Earth Science, 2023
The Ryukyu Trench is located in the northern Philippine Sea. The subduction of the Philippine Sea Plate to the Eurasia Plate along the Ryukyu Trench in the NNW direction leads to extremely complex tectonic processes such as subduction, collision ...
Tingwei Yang, Tingwei Yang, Ya Xu, Ya Xu, Ya Xu, Nanqiao Du, Tao Xu, Tao Xu, Danping Cao, Fangzhou Nan, Fangzhou Nan, Fangzhou Nan, Wei Chu, Ce Liang, Tianyao Hao, Tianyao Hao, Tianyao Hao   +16 more
doaj   +1 more source

Variations in the crustal structure and strength of plate coupling along the Ryukyu subduction zone

Geoscience Letters, 2023
The Ryukyu trench-arc-back arc system is part of the subduction margins of the Philippine Sea plate. Previous studies have indicated that several geophysical and geological characteristics reveal significant variations (including convergent rate ...
Wen-Bin Doo, Chung-Liang Lo, Yin-Sheng Huang, Wen-Nan Wu, Shiou-Ya Wang   +4 more
doaj   +1 more source