Results 11 to 20 of about 1,177 (180)
Forum Geografi, 2021 Internal temperature variations of pyroclastic flows and their deposits are arguably the most challenging data to acquire. As a preliminary study of the temperature variation inside pyroclastic flows, the remains of Onokoba Elementary School (Shimabara ...
Balázs Bradák +3 more
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Abrasion in pyroclastic flows [PDF]
Geologische Rundschau, 1992 The relative size of glass rims coating crystals in the matrix ash provides a semi-quantitative measure of abrasion of ash grains in pyroclastic flows. Median abrasion indices (= areacrystal / areaglass rim) are 8.4 to 18.5 in Laacher See pyroclastic flow units but only 4 to 6.3 in assocciated fallout, showing stronger abrasion of ash particles in the ...
Schmincke, H.-U., Freundt, A.
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Evolution Magmatism of Nagasari Volcano Dieng, Central Java, Indonesia
JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2022 Nagasari Volcano, part of the Dieng volcanic complex, is one of the unique volcanoes in Central Java. Around this volcano grow eruption craters, volcanic cones, and pyroclastic flow ridges. There were several 14 eruption centers around Mount Nagasari, so
Dwi Fitri Yudiantoro +6 more
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Latin American Journal of Sedimentology and Basin Analysis, 2021 The southeastern border of the Laguna Merín Basin (Rocha Department, East Uruguay) consists of Mesozoic volcanic deposits of the Puerto Gómez and Arequita formations, overlain by a sedimentary cover of Cenozoic and recent deposits.
Rossana Muzio Sauer +3 more
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A Unifying Model for Pyroclastic Surge Genesis and Pyroclastic Flow Fluidization
Geophysical Research Letters, 2022 AbstractPyroclastic density currents (PDCs) are hot and fast ground‐hugging mixtures of volcanic fragments and gases, which represent a major threat to people living near explosive volcanoes. Mechanisms causing the separation into the concentrated (the pyroclastic flow) and dilute (the pyroclastic surge) layers, as well as the mechanism causing their ...
Kelfoun, Karim, Gueugneau, Valentin
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Scientific Reports, 2021 Pyroclastic density currents are ground hugging gas-particle flows that originate from the collapse of an eruption column or lava dome. They move away from the volcano at high speed, causing devastation.
Pierfrancesco Dellino +4 more
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Indonesian Journal on Geoscience, 2018 DOI: 10.17014/ijog.5.1.1-11This study applies the charcoalification measurement method to infer the emplacement temperature of pyroclastic flow deposits erupted from the Sundoro Volcano, Indonesia.
Agung Harijoko +2 more
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Frontiers in Earth Science, 2020 The Mount Pelée May 8th, 1902 eruption is responsible for the deaths of more than 29,000 people, as well as the nearly-complete destruction of the city of Saint Pierre by a single pyroclastic current, and is, sadly, the deadliest eruption of the 20th ...
Valentin Gueugneau +5 more
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Modeling the Dynamics of Dense Pyroclastic Flows on Venus: Insights Into Pyroclastic Eruptions
Journal of Geophysical Research: Planets, 2021 Abstract On Venus, relatively young deposits near volcanic and coronal summits with unique radar characteristics have been proposed to be emplaced by pyroclastic density currents (PDCs). The proposed units are laterally extensive, long‐runout deposits showing moderate to high radar backscatter and circular polarization ratio in 12.6 ...
Indujaa Ganesh +2 more
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Frontiers in Earth Science, 2020 Pyroclastic density currents (PDCs) are a destructive volcanic hazard. Quantifying the types, frequency and magnitudes of PDC events is essential for effective risk management, but since historical records at best extend a few hundred years this usually ...
James Cowlyn +4 more
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