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Article
Open AccessThick slab crust with rough basement weakens interplate coupling in the western Nankai Trough
The westernmost Nankai Trough, southwest Japan, exhibits a rapid along-strike reduction in plate coupling in the proximity to the subducting Kyushu-Palau ridge. Yet how and to what extent the ridge subduction ...
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Article
Open AccessIdentification of active faults and tectonic features through heat flow distribution in the Nankai Trough, Japan, based on high-resolution velocity-estimated bottom-simulating reflector depths
Estimates of heat flow can contribute to our understanding of geological structures in plate convergent zones that produce great earthquakes. We applied automated velocity analysis to obtain the accurate seism...
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Article
Open AccessSeismic reflection imaging of deep crustal structures using local earthquakes in the Kanto region, Japan
We applied a novel method of passive seismic reflection imaging to actual local earthquake data collected by a dense seismic network in the Kanto region, Japan. This method, which implements reverse time migra...
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Article
Open AccessDécollement geometry controls on shallow very low frequency earthquakes
Recent studies have documented the occurrence of shallow very low frequency earthquakes (VLFE) in subduction zones. The heterogeneity of the materials or stresses that act on the plate interface results in the...
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Article
Open AccessSeismic reflection imaging of deep crustal structures via reverse time migration using offshore wide-angle seismic data on the eastern margin of the Sea of Japan
We applied reverse time migration (RTM) to offshore wide-angle seismic data acquired with airgun shots and sparsely deployed ocean bottom seismographs (OBSs) for reflection imaging of the Moho discontinuity in...
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Article
Open AccessCorrection to: Weak faults at megathrust plate boundary respond to tidal stress
An amendment to this paper has been published and can be accessed via the original article.
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Article
Open AccessWeak faults at megathrust plate boundary respond to tidal stress
Lateral spatial variations of weak portions at the plate boundary in subduction zones have been estimated primarily by the distribution of slow earthquakes mainly occurring around seismogenic zones. However, t...
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Article
Open AccessDetection of hydroacoustic signals on a fiber-optic submarine cable
A ship-based seismic survey was conducted close to a fiber-optic submarine cable, and 50 km-long distributed acoustic sensing (DAS) recordings with air-gun shots were obtained for the first time. We examine th...
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Article
Open AccessThree-dimensional topographic relief of the oceanic crust may control the occurrence of shallow very-low-frequency earthquakes in the Nankai Trough off Kumano
To explore a local relationship between geological structures and the occurrence of very-low-frequency earthquakes (VLFEs), a particular class of slow earthquakes with characteristic periods of 10–100 s, we in...
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Article
Open AccessGeometrical dependence on the stress and slip tendency acting on the subduction megathrust of the Nankai seismogenic zone off Kumano
We assess the dependence of megathrust geometry near the updip edge of the Nankai seismogenic zone according to the slip tendency of the megathrust based on a reprocessed 3D PSDM seismic volume image and Inter...
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Article
Morpho-sedimentary features and sediment dispersal systems of the southwest end of the Ryukyu Trench: a source-to-sink approach
The southwestern Ryukyu Trench near Taiwan is an ideal place for source-to-sink studies because of the short sediment transport route between the terrestrial sediment source in Taiwan and the marine sink in th...
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Transient Hypotension Induces Remote Neuronal Damage from the Primary Concussion in the Rat
In order to evaluate effects of hypotension in the experimantal concussion model, a conventional fluid percussion method was combined with transient hypotension in the rat. Over the right dorsal cortex, fluid ...
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Article
Glycogen-rich meningioma. Case report and short review
A case of meningioma with cytoplasm rich in glycogen granules is described as an atypical type of meningotheliomatous meningioma.
