Results 31 to 40 of about 1,257 (218)

Volcanic Hazard Assessment for an Eruption Hiatus, or Post-eruption Unrest Context: Modeling Continued Dome Collapse Hazards for Soufrière Hills Volcano

Frontiers in Earth Science, 2020
Effective volcanic hazard management in regions where populations live in close proximity to persistent volcanic activity involves understanding the dynamic nature of hazards, and associated risk.
Elaine T. Spiller, Robert L. Wolpert, Sarah E. Ogburn, Eliza S. Calder, James O. Berger, Abani K. Patra, E. Bruce Pitman   +6 more
doaj   +1 more source

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   +1 more source

Experimental constraints on volcanic ash generation and clast morphometrics in pyroclastic density currents and granular flows

Volcanica, 2020
Pyroclastic density currents (PDCs) are a prominent hazard of volcanic activity; however, fully quantitative observations are lacking and little direct evidence exists to constrain the parameters controlling ash production and runout. Here, we use rotary
Adrian Hornby, U Kueppers, Benedikt Maurer, Carina Poetsch, Donald Dingwell   +4 more
doaj   +1 more source

Pyroclastic density currents

, 2013
This chapter summarizes the principal experimental and theoretical approaches used to investigate the physics of pyroclastic density currents (PDCs), which are gravity driven hot gas–particle mixtures commonly generated during explosive volcanic eruptions.
Roche, Olivier, Phillips, J.C., Kelfoun, Karim   +2 more
openaire   +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   +1 more source

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   +1 more source

Dynamics of Two Caldera-Forming Eruptions (Banda Besar and Naira) in the Marine Conservation Zone of Banda, Maluku, Indonesia

Geosciences, 2022
This is the first study discussing the dynamics of two caldera-forming eruptions in the Banda volcanic complex (BVC) in the marine conservation zone of Banda, Maluku, Indonesia.
Indranova Suhendro, Bachtiar W. Mutaqin, Dyan Primana Sobaruddin, Lestari Agustiningtyas, Hanik Humaida, Muh Aris Marfai, Danang Sri Hadmoko   +6 more
doaj   +1 more source

Assessment of motion-induced fluidization of dense pyroclastic gravity currents

Annals of Geophysics, 2005
The paper addresses some fundamental aspects of the dynamics of dense granular flows down inclines relevant to pyroclastic density currents. A simple mechanistic framework is presented to analyze the dynamics of the frontal zone, with a focus ...
P. Salatino
doaj   +1 more source

Long-runout pyroclastic density currents: Analysis and implications

Geology, 2022
Abstract Pyroclastic density currents are hazardous, ground-hugging, hot mixtures of gas and solid particles produced by volcanoes. Currents generated by the largest explosive eruptions have traveled distances on the order of 100 km, and their devastating impact has repeatedly marked Earth's geologic history.
Roche, Olivier, Henry, Christopher, Azzaoui, Nourddine, Guillin, Arnaud   +3 more
openaire   +1 more source

Experimental study of dense pyroclastic density currents using sustained, gas-fluidized granular flows

, 2014
International audienceWe present the results of laboratory experiments on the behaviour of sustained, dense granular flows in a horizontal flume, in which high-gas pore pressure was maintained throughout the flow duration by continuous injection of gas ...
Druitt, Timothy H., Druitt, Tim, Cas, Ray, Cas, R., Rowley, Pete J., Rowley, Peter James, Roche, Olivier, Rowley, P. J., Druitt, T. H.   +8 more
core   +1 more source