A5060646080- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Geological formations and processes
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Seismology and Earthquake Studies
- Earthquake and Tsunami Effects
- Landslides and related hazards
- Earthquake and Disaster Impact Studies
- Archaeology and ancient environmental studies
- Electromagnetic Fields and Biological Effects
- Isotope Analysis in Ecology
- Coastal and Marine Dynamics
- Wireless Body Area Networks
- Geological and Geophysical Studies
- Pleistocene-Era Hominins and Archaeology
- Pacific and Southeast Asian Studies
- Geochemistry and Geologic Mapping
- Earthquake Detection and Analysis
- Marine Biology and Ecology Research
- Marine and environmental studies
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- Ultrasound and Hyperthermia Applications
- Antenna Design and Analysis
Geological Survey of Japan
2015-2024
National Institute of Advanced Industrial Science and Technology
2015-2024
Nagoya Institute of Technology
1998-2022
Association for the Development of Earthquake Prediction
2010-2013
Kyushu University
2013
Niigata University
2013
Nara University
2013
Tohoku Gakuin University
2012
Tokyo Women's Medical University
2011
Kagoshima City Hospital
2011
Sandy deposits of marine origin underlie the floor Suijin-numa, a coastal lake midway along subduction zone marked by Japan Trench. The form three units that are interbedded with lacustrine peat and mud above foundation marine, probably littoral sand. Unlike deposits, all sandy contain brackish diatoms. middle unit (B) contains, in addition, graded beds suggestive multiple waves long wavelength period. uppermost (C) dates to time area's written history when was separated from sea beach-ridge...
Tidal Lake Hamana is located near the Nankai-Suruga Trough, which repeatedly affected by tsunamogenic megathrust earthquakes. The lake represents a good sedimentary archive for past earthquakes and extreme wave events (EWEs), triggered tsunamis tropical storms (typhoons). By applying broad range of surveying methods, sedimentological analyses dating techniques, 7.5-kyr-long record ≥ 22 EWE deposits was extracted. Event are embedded in fine-grained (silty) lacustrine sediments have...
Abstract Four sand units deposited by tsunamis and one unit storm surge(s) were identified in a muddy marsh succession narrow coastal lowland along the Pacific coast of central Japan. Tsunamis ad 1498, 1605, 1707 1854 that related to large subduction‐zone earthquakes Nankai Trough, surges 1680 and/or 1699 responsible for deposition these units. These are distinguished lithofacies, sedimentary structures, grain‐size mineral composition, radiocarbon ages; their ages supported events local...
Abstract Foraminiferal tests are commonly found in tsunami deposits and provide evidence of transport sea floor sediments, sometimes from source areas more than 100 m deep several kilometers away. These data contribute to estimates the physical properties waves, such as their amplitude period. The tractive force waves is inversely proportional water depth at sediment areas, whereas horizontal distance by wave period amplitude. We derived formulas for amplitudes periods functions area based...
Three washover sand beds, ranging from 15 to 34 cm in thickness, were recorded a lagoonal mud sequence on the Shizuoka coast of central Japan, which faces Suruga Trough. The beds composed well-sorted and well-rounded beach derived by marine inundation. basal erosion surface, clasts, presence both inverse normal grading suggest that formed as result high-energy deposition. are multilayered, with fine alternations sheets drapes, consistent deposition long-period wave train. Radiocarbon dates...
Abstract We describe the detailed sedimentary characteristics of a tsunami deposit associated with 2011 Tohoku‐oki in Hasunuma, site on Kujukuri coastal plain, Japan. The thick was limited to within 350 m from coastline whereas inundation area extended about 1 km coastline. sampled by excavation at 29 locations along three transects and studied using peels, soft‐X imaging grain‐size analysis. covers pre‐existing soil reached maximum measured thickness 35 cm. It consists mainly well‐sorted...
Abstract Tsunami deposits preserved in the geological record provide a more comprehensive understanding of their patterns frequency and intensity over longer timescales; but recognizing tsunami can prove challenging due to post‐depositional changes, lack contrast between surrounding sedimentary layers, differentiating storm deposition. Modern baseline studies address these challenges by providing insight into modern spatial distributions that be compared with palaeotsunami deposits. This...