Multiphase flow behaviour and hazard prediction of pyroclastic density currents

G Lube, ECP Breard, T Esposti-Ongaro… - Nature Reviews Earth & …, 2020‏ - nature.com
Pyroclastic density currents (PDCs) are dangerous multiphase flows originating from
volcanic eruptions. PDCs cause more than a third of volcanic fatalities globally and …

Sediment waves and the gravitational stability of volcanic jets

JT Gilchrist, AM Jellinek - Bulletin of Volcanology, 2021‏ - Springer
It is increasingly recognized that the gravitational stability of explosive eruption columns is
governed by complex ash-pumice-gas (multiphase) interactions as well as the mechanics of …

Explosive submarine eruptions: The role of condensable gas jets in underwater eruptions

RC Cahalan, J Dufek - Journal of Geophysical Research: Solid …, 2021‏ - Wiley Online Library
In explosive submarine eruptions, volcanic jets transport fragmented tephra and exsolved
gases from the conduit into the water column. Upon eruption the volcanic jet mixes with …

Supersaturation nucleation and growth of plagioclase: a numerical model of decompression-induced crystallization

BJ Andrews, KS Befus - Contributions to Mineralogy and Petrology, 2020‏ - Springer
Abstract Supersaturation Nucleation and Growth of Plagioclase (SNGPlag) is a numerical
model that predicts the nucleation and growth of plagioclase crystals in a decompressing …

Dynamics of pyroclastic density currents: Conditions that promote substrate erosion and self-channelization—Mount St Helens, Washington (USA)

BD Brand, C Mackaman-Lofland, NM Pollock… - Journal of Volcanology …, 2014‏ - Elsevier
The May 18th, 1980 eruption of Mount St. Helens (MSH) produced multiple pyroclastic
density currents (PDCs), burying the area north of the volcano under 10s of meters of …

Impact of wind on the condition for column collapse of volcanic plumes

W Degruyter, C Bonadonna - Earth and Planetary Science Letters, 2013‏ - Elsevier
The collapse of volcanic plumes has significant implications for eruption dynamics and
associated hazards. We show how eruptive columns can collapse and generate pyroclastic …

Volcano video data characterized and classified using computer vision and machine learning algorithms

AJC Witsil, JB Johnson - Geoscience Frontiers, 2020‏ - Elsevier
Video cameras are common at volcano observatories, but their utility is often limited during
periods of crisis due to the large data volume from continuous acquisition and time …

Volcanic jets, plumes, and collapsing fountains: evidence from large-scale experiments, with particular emphasis on the entrainment rate

P Dellino, F Dioguardi, D Mele, M D'Addabbo… - Bulletin of …, 2014‏ - Springer
The source conditions of volcanic plumes and collapsing fountains are investigated by
means of large-scale experiments. In the experiments, gas-particle jets issuing from a …

Topographic controls on pyroclastic density current dynamics: insight from 18 May 1980 deposits at Mount St. Helens, Washington (USA)

BD Brand, S Bendaña, S Self, N Pollock - Journal of Volcanology and …, 2016‏ - Elsevier
Our ability to interpret the deposits of pyroclastic density currents (PDCs) is critical for
understanding the transport and depositional processes that control PDC dynamics. This …

Complex variations during a caldera-forming Plinian eruption, including precursor deposits, thick pumice fallout, co-ignimbrite breccias and climactic lag breccias: The …

JM Simmons, RAF Cas, TH Druitt, CB Folkes - Journal of Volcanology and …, 2016‏ - Elsevier
Abstract The 184 ka Lower Pumice 1 eruption sequence records a complex history of
eruption behaviours denoted by two significant eruptive phases:(1) a minor precursor (LP1 …