Results 101 to 110 of about 3,985 (225)

Precise Temperature Measurements and Long‐Term Observations Revealed an Almost‐Constant Temperature Zone in a Vertical 700‐m‐Deep Borehole in the Aso Volcanic Region

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract To determine the subsurface temperature distribution and its relevance to groundwater flow in the deep subsurface, we repeated temperature depth profile measurements and conducted long‐term temperature observations in an ∼700‐m‐deep borehole penetrating the Futagawa fault along the Kiyama–Kashima graben in the Aso volcanic region, Japan from ...
Weiren Lin, Susumu Shibutani, Shuai Feng, Nana Kamiya, Kazuya Ishitsuka, Xiaoqiu Yang, Yutaro Shigemitsu, Yupeng Cao, Koichiro Sado   +8 more
wiley   +1 more source

Influence of the Dynamic Geological History of the Japanese Archipelago on the Molecular Phylogeography of the Riffle Beetle Zaitzeviaria ovata (Coleoptera: Elmidae)

Freshwater Biology, Volume 71, Issue 6, June 2026.
ABSTRACT The geographic genetic structure and distribution within species are shaped by factors such as dynamic tectonic activity and topographic changes associated with climate change. We used the largely flightless, freshwater‐dependent beetle Zaitzeviaria ovata (Elmidae) as a model to investigate how ancient topography and dynamic geological history
Takumi Yoshida, Masakazu Hayashi, Masaki Takenaka, Koji Tojo   +3 more
wiley   +1 more source

Experimental evidence links volcanic particle characteristics to pyroclastic flow hazard

, 2010
Pyroclastic flows represent the most hazardous events of explosive volcanism, one striking example being the famous historical eruption of Vesuvius that destroyed Pompeii (AD 79).
MELE D, SULPIZIO R, ZIMANOWSKI B, DIOGUARDI F, LA VOLPE L, DELLINO P, DORONZO D. M, BÜTTNER R, SONDER I   +8 more
core   +1 more source

Surface Flows Modelling: Cellular Automata Simulations of Lava, Debris and Pyroclastic Flows

, 2006
Cellular Automata (CA) are a computational paradigm, a valid alternative to standard methods with differential equations for modelling and simulating complex systems, whose behaviour may be specified in terms of local interactions in a context of ...
Avolio, M. V., Di Gregorio, S., Rongo, R., Crisci, G. M., D’Ambrosio, D., Spataro, W., Iovine, Giulio, Lupiano, V.   +7 more
core  

Control of crater morphology on flow path direction of Soufriere-type pyroclastic flows

, 1999
We present a model of fountain collapse for small-scale (Soufrière-type) explosive eruptions that relates the asymmetry of a volcanic crater (e.g., the presence of crater notches) with the emplacement direction of pyroclastic flows.
Brian Dade, Pyle, DM, Oppenheimer, C, Pyle, David, Lagmay, MA, David M. Pyle, Clive Oppenheimer, Mahar A. Lagmay, Dade, B   +8 more
core   +1 more source

Debris Flow and Pyroclastic Flow at Unzen Volcano

JAPANESE JOURNAL OF MULTIPHASE FLOW, 1993
Unzen Volcano began to erupt in November 1990 after 198 years of dormancy and has remained active. Continuous growth of a lava dome and falls of lava rocks have resulted in frequent pyroclastic flows. Since a great volume of volcanic material has been deposited and scattered by the pyroclastic flows, debris flows have frequently occurred along the ...
openaire   +2 more sources

Characteristics of Pyroclastic Flow at Sakurajima Volcano's Showa Crater [PDF]

, 2018
Eruptions at the Showa crater become active since 2008 and are sometimes accompanied with small pyroclastic flows. It is important to understand the mechanism of generation of the pyroclastic flow for volcanic disaster prevention.
為栗, 健, 井口, 正人
core  

Are eruptions from linear fissures and caldera ring dykes more likely to produce pyroclastic flows ?

, 2016
Turbulent volcanic jets are produced by highly-energetic explosive eruptions and may form buoyant plumes that rise many tens of kilometres into the atmosphere to form umbrella clouds or collapse to generate ground-hugging pyroclastic flows.
Jellinek, A.M., Gilchrist, J., Roche, Olivier, Jessop, David, Jessop, D. E., Jellinek, A. M.   +5 more
core   +1 more source

Large‐Scale Topographic Changes at Erupting Volcanoes Measured by the TanDEM‐X Digital Change Map

Earth and Space Science
Volcanic eruptions cause large‐scale topographic changes, through the emplacement of lava flows and lava domes, the formation of craters and calderas, and thick ash and pyroclastic deposits.
Rebecca Edwards, Juliet Biggs
doaj   +1 more source

A two-layer approach to modelling the transformation of dilute pyroclastic currents into dense pyroclastic flows

, 2010
Most models of volcanic ash flows assume that the flow is either dilute or dense, with dynamics dominated by fluid turbulence or particle collisions, respectively. However, most naturally occurring flows feature both of these end members.
Heidy M. Mader, Emma E. Doyle, Andrew J. Hogg   +2 more
core   +1 more source