Ohba Takeshi

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Volcanic history and magma systems of Lake Monoun Polygenetic Maar, Noun Plain, Western part of the Cameroon Volcanic Line: Constraints from stratigraphy, chronology and geochemistry

Development of a new device for CO2 microdiffusion analysis of fluid samples from volcanic areas without using a fixative

Correlation between volcanic gas composition and earthquake frequency at Kusatsu-Shirane volcano, Japan

Principal component analysis for the elemental composition of sedimentary sands in the Hayakawa River of Hakone Caldera, Japan

Magma-hydrothermal system of Kusatsu-Shirane volcano, Japan

Temporal Variation in Volcanic Gas Composition at Kusatsu-Shirane Volcano

Monitoring of magmatic�Chydrothermal system by noble gas and carbon isotopic compositions of fumarolic gases

Major ions, trace elements and stable isotope characteristics of shallow groundwater in the Bonaberi district, Douala, Cameroon

A Depression Containing CO2-Enriched Water at the Bottom of Lake Monoun, Cameroon, and Implications for the 1984 Limnic Eruption

Volcanic Ash from the June 17, 1962 Eruption of Yakedake Volcano: Stereomicroscopic, XRD, and Water-Soluble Components Analyses

Quantitative Assessment of Temporal Changes in Subaqueous Hydrothermal Activity in Active Crater Lakes During Unrest Based on a Time-Series of Lake Water Chemistry

Time variation in hydrothermal circulation at the shallow part of Kusatsu-Shirane volcano inferred from temporal changes in water chemistry

Rainwater Quality in Some Urban and Rural Sites of Cameroon (Central Africa)

Spatial distribution of Helium and Carbon isotope ratios in soil gas outside the Yugama crater at Kusatsu-Shirane volcano: The source of the soil gas

Special issue "Understanding phreatic eruptions - recent observations of Kusatsu-Shirane volcano and equivalents-"

Groundwater Interacting at Depth With Hot Plastic Magma Triggers Phreatic Eruptions at Yugama Crater Lake of Kusatsu-Shirane Volcano (Japan)

Behavior of magmatic components in fumarolic gases related to the 2018 phreatic eruption at Ebinokogen Ioyama volcano, Kirishima Volcanic Group, Kyushu, Japan

High�C�� signature in lavas of Mt. Oku: Implications for lithospheric and asthenospheric contributions to the magmatism of the Cameroon Volcanic Line (West Africa)

Isotopic composition of precipitation and groundwater onshore of the Rio del Rey Basin, southwest Cameroon: local meteoric lines and recharge

Carbon Dioxide in Lake Nyos, Cameroon, Estimated Quantitatively From Sound Speed Measurements

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Field study on the Nyos lake and Monoun lake, Cameroon

Training and teaching to the engineers from developing countries

Field study on the crater lake on Ruapehu volcano, NewZealand

Field study on Kawah Ijen Volcano, Indonesia

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Development of a flash-type volcanic gas composition automatic observation device and prediction of phreatic eruption

Understanding the magma system at Taal volcano, Philippines, based on in-situ geophysical observations

Monitoring of temperature in hydrothermal reservoir using gaseous elemental mercury

Elucidation of magmatic and hydrothermal systems of the highly eruptive Taal and Mayon volcanoes

Volcanic eruption potential diagnosis by volcanic gas observation

Remote sensing for the volcanic fluid by use of back scattering Raman light

High-time resolution optical observation of auroras in the Canadian arctic

Geochemical approach to estimate the rates of Lakes Nyos and Monoun degassing and the Nyos dam erosion

Japan-Russia-USA joint research of volcanic activity, seismic activity and crustal deformation of Kuril arc

Observation and investigation for the formation SPM originates in high temperature volcanic gas

shallow magma plumbing system at Rabaul caldera, Papua new Guinea

ARE MAGMAS BENEATH THE CAMEROON VOLCANIC LINE ENRICHED IN CARBON DIOXIDE? -RELATIONSHIP WITH THE LAKE NYOS-TYPE GAS DISASTERS-

Geochemical Investigation of Active Crater Lakes in Indonesia