Results 1 to 10 of about 9,703,189 (200)
Reconciling Pyroclastic Flow and Surge: The Multiphase Physics of Pyroclastic Density Currents [PDF]
Earth and Planetary Science Letters, 2002 Two end-member types of pyroclastic density current are commonly recognized: pyroclastic surges are dilute currents in which particles are carried in turbulent suspension and pyroclastic flows are highly concentrated flows. We provide scaling relations that unify these end-members and derive a segregation mechanism into basal concentrated flow and ...
George Bergantz, Alain Burgisser
exaly +4 more sources
The impact of pyroclastic density currents duration on humans: the case of the AD 79 eruption of Vesuvius [PDF]
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
doaj +2 more sources
Spontaneous Unsteadiness and Sorting in Pyroclastic Density Currents and their Deposits [PDF]
, 2023 Pyroclastic density currents (PDCs) pose substantial risk to populations living on and around active volcanoes, but their structure and internal dynamics are poorly understood. Much of this understanding is derived from interpretation of their widespread deposits.
Pete Rowley +9 more
openaire +2 more sources
Temperatures of the A.D. 79 Pyroclastic Density Current Deposits (Vesuvius, Italy) [PDF]
Journal of Geophysical Research: Solid Earth, 2004 The temperature of the deposits left by different types of pyroclastic density currents (PDCs) of the A.D. 79 “Pompei” eruption of Vesuvius was estimated by measuring the thermal remanent magnetization (TRM) of lithic clasts carried by the currents. More than 200 lava clasts and roof tile fragments were collected at different sites and distances from ...
Raffaello Cioni +2 more
exaly +3 more sources
Exploring Pyroclastic Density Currents With Analogue Models
Nature Reviews Earth & Environment, 2022 Nemi Walding
exaly +3 more sources
The fragmentation-induced fluidisation of pyroclastic density currents [PDF]
Nature Communications, 2023 AbstractPyroclastic density currents (PDCs) are the most lethal volcanic process on Earth. Forecasting their inundation area is essential to mitigate their risk, but existing models are limited by our poor understanding of their dynamics. Here, we explore the role of evolving grain-size distribution in controlling the runout of the most common PDCs ...
Eric C. P. Breard +5 more
openaire +3 more sources
Petroleum Exploration and Development, 2023 The conventional lithofacies and facies model of subaerial and marine pyroclastic rocks cannot reflect the characteristics of subaqueous volcanic edifice in lacustrine basins.
Xuanlong SHAN +7 more
doaj +1 more source
Assessing minimum pyroclastic density current mass to impact critical infrastructures: example from Aso caldera (Japan) [PDF]
Natural Hazards and Earth System Sciences, 2022 We describe a method for calculating the probability that a distal geographic location is impacted by a pyroclastic density current (PDC) of a given size, considering the key related uncertainties. Specifically, we evaluate the minimum volume and mass of
A. Bevilacqua +8 more
doaj +1 more source
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
doaj +1 more source
Reproducing pyroclastic density current deposits of the 79 CE eruption of the Somma–Vesuvius volcano using the box-model approach [PDF]
Solid Earth, 2021 We use PyBox, a new numerical implementation of the box-model approach, to reproduce pyroclastic density current (PDC) deposits from the Somma–Vesuvius volcano (Italy).
A. Tadini +9 more
doaj +1 more source