Results 11 to 20 of about 624,031 (203)

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, A. Aravena, A. Aravena, W. Aspinall, A. Costa, S. Mahony, A. Neri, S. Sparks, B. Hill   +8 more
doaj   +2 more sources

Pyroclastic Density Current Hazard Assessment and Modeling Uncertainties for Fuego Volcano, Guatemala

Remote Sensing, 2020
On 3 June 2018, Fuego volcano experienced a VEI = 3 eruption, which produced a pyroclastic density current (PDC) that devastated the La Réunion resort and the community of Los Lotes, resulting in over 100 deaths.
Ian T. W. Flynn, Michael S. Ramsey
doaj   +2 more sources

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.
Burgisser, Alain, W. Bergantz, George
core   +6 more sources

Distribution and Eruptive Volume of Aso-4 Pyroclastic Density Current and Tephra Fall Deposits, Japan: A M8 Super-Eruption

Frontiers in Earth Science, 2020
Estimations of the distribution and eruptive volume of large-scale pyroclastic density current (PDCs) and tephra fall deposits are essential for evaluation of the affected area, long-term volcanic hazards assessments, volcanic activity, and geophysical ...
Shinji Takarada, Hideo Hoshizumi
doaj   +2 more sources

Scenario-Based Pyroclastic Density Current Invasion Maps at Poorly Known Volcanoes: A Case Study from Changbaishan (China/North Korea)

Applied Sciences, 2020
Changbaishan volcano (China/North Korea; last eruption in 1903 AD) was responsible for a Volcanic Explosivity Index (VEI) 7 eruption in 946 AD. Approximately 186,000 people live around Changbaishan and 2,000,000 tourists/year visit the volcano. An unrest
Anna Maria Lombardi, Pierdomenico Del Gaudio, Zhengfu Guo, Maoliang Zhang, Guoming Liu, Vincenzo Sepe, Jiaqi Liu, Guido Ventura   +7 more
doaj   +2 more sources

Dynamic Statistical Models for Pyroclastic Density Current Generation at Soufrière Hills Volcano

Frontiers in Earth Science, 2018
To mitigate volcanic hazards from pyroclastic density currents, volcanologists generate hazard maps that provide long-term forecasts of areas of potential impact. Several recent efforts in the field develop new statistical methods for application of flow
Robert L. Wolpert, Elaine T. Spiller, Eliza S. Calder   +2 more
doaj   +2 more sources

The impact of pyroclastic density currents duration on humans: the case of the AD 79 eruption of Vesuvius

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, Fabio Dioguardi, Roberto Isaia, Roberto Sulpizio, Daniela Mele   +4 more
doaj   +2 more sources

Dynamics and Deposits of Pyroclastic Density Currents in Magmatic and Phreatomagmatic Eruptions Revealed by a Two‐Layer Depth‐Averaged Model

Geophysical Research Letters, 2023
A pyroclastic density current (PDC) is characterized by its strong stratification of particle concentration; it consists of upper dilute and lower dense currents, which generally control the dynamics and deposits of PDCs, respectively.
Hiroyuki A. Shimizu, Takehiro Koyaguchi, Yujiro J. Suzuki   +2 more
doaj   +2 more sources

Pyroclastic Density Current Facies in the Millennium Eruption of Tianchi Volcano, Northeast China: Insights From Topography, Stratigraphy, Granulometry, and Petrography

Frontiers in Earth Science, 2020
Large-scale pyroclastic density currents (PDCs) produce inhomogeneity of distributions, thicknesses, stratigraphic structures, and temperatures, thereby causing poor understanding of PDC emplacement processes.
Bo Zhao, Bo Zhao, Jiandong Xu, Jiandong Xu, Hongmei Yu, Hongmei Yu, Zhengquan Chen, Zhengquan Chen   +7 more
doaj   +2 more sources

Multi-parametric study of an eruptive phase comprising unrest, major explosions, crater failure, pyroclastic density currents and lava flows: Stromboli volcano, 1 December 2020–30 June 2021

Frontiers in Earth Science, 2022
Open conduit volcanoes like Stromboli can display elusive changes in activity before major eruptive events. Starting on December 2020, Stromboli volcano displayed an increasing eruptive activity, that on 19 May 2021 led to a crater-rim collapse, with ...
S. Calvari, F. Di Traglia, G. Ganci, V. Bruno, F. Ciancitto, B. Di Lieto, S. Gambino, A. Garcia, F. Giudicepietro, S. Inguaggiato, F. Vita, M. Cangemi, C. Inguaggiato, C. Inguaggiato, G. Macedonio, M. Mattia, L. Miraglia, T. Nolesini, M. Pompilio, P. Romano, G. Salerno, N. Casagli, N. Casagli, G. Re, P. Del Carlo, A. Di Roberto, A. Cappello, C. Corradino, E. Amato, E. Amato, F. Torrisi, F. Torrisi, C. Del Negro, A. M. Esposito, W. De Cesare, T. Caputo, M. F. Buongiorno, M. Musacchio, V. Romaniello, M. Silvestri, E. Marotta, R. Avino, G. Avvisati, P. Belviso   +43 more
doaj   +2 more sources