A5023652444- earthquake and tectonic studies
- Geothermal Energy Systems and Applications
- Geological and Geochemical Analysis
- Groundwater and Isotope Geochemistry
- Seismic Waves and Analysis
- Groundwater flow and contamination studies
- High-pressure geophysics and materials
- Geophysical and Geoelectrical Methods
- Geochemistry and Geologic Mapping
- Karst Systems and Hydrogeology
- Hydrological Forecasting Using AI
- Hydrology and Watershed Management Studies
- Urban Stormwater Management Solutions
- Geology and Paleoclimatology Research
- Underwater Acoustics Research
- Soil and Water Nutrient Dynamics
- Pacific and Southeast Asian Studies
- Earthquake Detection and Analysis
- Mine drainage and remediation techniques
- Arsenic contamination and mitigation
- Hydrology and Drought Analysis
- Environmental Impact and Sustainability
- Methane Hydrates and Related Phenomena
- Advanced SAR Imaging Techniques
National Institute of Advanced Industrial Science and Technology
2020-2024
Hirosaki University
2014-2017
Association for the Development of Earthquake Prediction
2014
The University of Tokyo
2014
Research Article| October 15, 2014 Dual Infrasound Sources from a Vulcanian Eruption of Sakurajima Volcano Inferred Cross‐Array Observation Akihiko Yokoo; Yokoo aAso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate School Science, Kyoto University, 5280 Kawayo, Minami‐Aso, Kumamoto 869‐1404, Japanyokoo@aso.vgs.kyoto-u.ac.jp Search other works by this author on: GSW Google Scholar Yujiro J. Suzuki; Suzuki bEarthquake Institute, University Tokyo, 1‐1‐1 Yayoi, Tokyo...
This paper defines the maximum possible vertical extent of hydrothermal circulation in granitic crust, and thus depth within which geothermal reservoirs can be encountered. To evaluate prospective fields we constructed a database northern Honshu, Japan that includes 571 points thermal data existing wells hot springs. Depth-temperature curves were normalized by Activity Index for three-dimensional extrapolation contour map 380 °C isotherm was plotted as an assumed brittle-plastic transition...
One-month continuous in situ potentiometric measurements of redox potential (Eh) were used to investigate the dominant processes shallow groundwater (i.e., <10 m) a Holocene aquifer, Aomori City, northern Japan. The Eh values, which determined using platinum electrode, −163, −169 and −173 mV, respectively, for three monitoring campaigns. temperatures pH values during all periods approximately 12 °C 6.6, respectively. Dissolved oxygen sulfide ion concentrations not detected. Chemical analyses...
A considerable number of rock bodies with varying percentages supercritical fluid exist around the brittle–ductile transition (BDT) zone at a depth several kilometers from surface Earth, in northeastern Japan. As BDT granitic basement continental crust is estimated to occur about 380 °C, identification corresponding °C important utilize thermal energy inside “supercritical geothermal systems”. In this study, we focused on an estimation method determine isothermal layer using activity index...
Although pH measurements of hot spring water are taken in conventional geothermal resource research, previous studies have seldom created distribution maps stream and waters for an entire field as a technique exploration. In this study, map was by measuring at 75 sites the Mutsu Hiuchi Dake field, Japan. Areas abnormally high were detected midstream sections Ohaka Koaka rivers; these matched location East Slope Fault, which is believed to formed reservoir. The zone attributed trapping rising...
Deep low-frequency earthquakes (LFEs) are known to occur in dehydration phenomena from the subducting hydrous slab and magmatic beneath Quaternary volcanoes Japan. To realize spatial temporal characteristics of deep earthquakes, their hypocenters along with those ordinary overhead high-frequency analyzed six volcanic fields northeastern This trial clarifies rising basaltic magma conduits rheological profiles lithosphere. tend form three vertical clusters corresponding strength peak...
To promote geothermal development in Aomori Prefecture, Japan, this study compiled a database of the resources prefecture, which included chemical data for 786 hot springs, temperature 26 natural and subsurface 35 wells. A map activity index distribution entire prefecture was also developed using Prefecture Geothermal Resource database, its efficiency discussed by comparison with Quaternary volcanoes calculated quartz Na-K solute geothermometers. The showed good fit both region sharp eastern...
Earth and Space Science Open Archive This work has been accepted for publication in Other. Version of RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v1]3-D resistivity imaging supercritical geothermal system Sengan region, NE...
本研究は流域管理への適用可能な環境負荷排出インベントリーシステムの開発を目的に, 流域内外での流通活動の影響が評価可能なマクロインベントリーシステムと, 環境負荷の分布特性が把握可能な分布型インベントリーシステムを構築し, 東京湾流域の水需要に対して適用した. その結果, 東京湾流域では, 鉄鋼業, 化学工業などが多い沿岸地域での水需要量が多く, 6~7割は流域外での消費活動に誘発される構造にあることが明らかとなった. 一方, 東京都の水需要量は少ないが, 東京都での消費活動により東京湾流域で約35億m3の水需要が東京都以外の地域で誘発されるという結論が得られた. また水需要分布は, 部門ごとに分布の形態や強度が異なることが示された.
Japan has abundant hot spring resources, which, if used appropriately, could contribute to CO2 emission reduction and socioeconomic development. Thus, for the appropriate use of it is necessary estimate detailed discharge mechanism its surrounding hydraulic characteristics. In our study, a monitoring device was developed installed in Futamata evaluate mechanism. Comparison between measured values amount precipitation indicated that this shows two types water quality change trends depending...