Results 11 to 20 of about 197 (107)

Slab Pull Drives IBM Trench Advance Despite the Weakened Philippine Sea Plate

open access: yesGeophysical Research Letters, 2023
The mechanism behind the significant Izu‐Bonin‐Mariana (IBM) trench advance is still controversial. We conduct slab subduction numerical models that reproduce the spatio‐temporal tectonic evolution of the Philippine Sea region to investigate whether slab
Huizi Jian   +5 more
doaj   +1 more source

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

open access: yesGeoscience 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   +4 more
doaj   +1 more source

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

open access: yesPodzemni 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

Using GMT for 2D and 3D Modeling of the Ryukyu Trench Topography, Pacific Ocean

open access: yesMiscellanea Geographica: Regional Studies on Development, 2021
This research focuses on the 2D and 3D geospatial analysis of the Ryukyu Trench, a deep-sea trench located in the western Pacific Ocean between Japan and Taiwan.
Lemenkova Polina
doaj   +1 more source

Distribution of low-frequency earthquakes accompanying the very low frequency earthquakes along the Ryukyu Trench

open access: yesEarth, Planets and Space, 2017
This study investigated the activity and distribution of low-frequency earthquakes (LFEs) accompanying the very low frequency earthquakes (VLFEs) in the central and southern Ryukyu Trench.
Mamoru Nakamura
doaj   +1 more source

Variations in seismic velocity distribution along the Ryukyu (Nansei-Shoto) Trench subduction zone at the northwestern end of the Philippine Sea plate

open access: yesEarth, Planets and Space, 2017
The Ryukyu (Nansei-Shoto) island arc-trench system, southwest of Japan, is formed by the subduction of the Philippine Sea (PHS) plate. Among the subduction zones surrounding the Japan Islands, the Ryukyu arc-trench system is unique in that its backarc ...
Azusa Nishizawa   +5 more
doaj   +1 more source

Low-frequency earthquakes along the Ryukyu Islands triggered by teleseismic earthquakes

open access: yesEarth, Planets and Space, 2021
Tremors and low-frequency earthquakes (LFEs), which occur in the plate interface, can provide useful information about the state of aseismic stress transfer in mega-earthquake fault zones.
Ayumi Kinjo, Mamoru Nakamura
doaj   +1 more source

High-density surveys conducted to reveal active deformations of the upper forearc slope along the Ryukyu Trench, western Pacific, Japan

open access: yesProgress in Earth and Planetary Science, 2018
In this study, which was conducted to investigate present-day geological deformations occurring off the central Ryukyu Arc along the Ryukyu Trench (Okinawa-jima) in the vicinity of Japan, we obtained and examined dense, high-resolution, 2D grid (high ...
Kohsaku Arai   +2 more
doaj   +1 more source

A Decade of Global Navigation Satellite System/Acoustic Measurements of Back-Arc Spreading in the Southwestern Okinawa Trough

open access: yesFrontiers in Earth Science, 2021
Long-term seafloor geodetic measurements are important for constraining submarine crustal deformation near plate boundaries. Here we present an integrated analysis of a decade of GNSS/acoustic data collected at a site 60 km to the east of northeast ...
Horng-Yue Chen   +11 more
doaj   +1 more source

Potential of megathrust earthquakes along the southern Ryukyu Trench inferred from GNSS data

open access: yesEarth, Planets and Space, 2021
The southern part of the Ryukyu subduction zone has recorded tsunami events with a recurrence interval of several hundred years. Although their source is controversial, one model suggests that the last 1771 Yaeyama tsunami was caused by a shallow ...
Masayuki Kano   +4 more
doaj   +1 more source

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