Results 101 to 110 of about 1,257 (218)

Multiphase flow modeling and numerical simulation of pyroclastic density currents

, 2014
Pyroclastic density currents are hot and high-density mixtures of gas and particles of different sizes which can be originated during explosive volcanic events by the fragmentation of a viscous magma.
ORSUCCI, SIMONE
core  

Characteristics of submarine pumice-rich density current deposits sourced from turbulent mixing of subaerial pyroclastic flows at the shoreline: field and experimental assessment

, 2011
This study investigates the types of subaqueous deposits that occur when hot pyroclastic flows turbulently mix with water at the shoreline through field studies of the Znp marine tephra in Japan and flume experiments where hot tephra sample interacted ...
Allen, S. R., A. Freundt, Freundt, Armin, Kurokawa, K., K. Kurokawa, S. R. Allen   +5 more
core   +1 more source

A recent pyroclastic density current (1963-64 AD? - 1976 AD?) from the Copahue volcano (I): Field geological evidences and radiocarbon age [PDF]

, 2020
Se describe un depósito atribuido a una corriente piroclástica sobre los flancos NE, E y SE del volcán Copahue. La datación radiocarbónica (F = 1.3678 ±0.0075) permite asignarle dos edades eruptivas posibles 1963-64 AD y 1976 AD (1961 AD?).
Páez, Gerardo Néstor, Petrinovic, Ivan Alejandro, Villarosa, Gustavo, Carniel, Roberto, Balbis, Catalina, Guzmán, Silvina Raquel, D’Elia, Leandro   +6 more
core  

Paleomagnetic study of juvenile basaltic-andesite clasts from Andean pyroclastic density current deposits

, 2014
Additional paleomagnetic data are necessary to improve geomagnetic models of secular variation during the Holocene, especially from the southern hemisphere.
Chauvin, Annick, Roperch, P., Chauvin, A., Roperch, Pierrick, Lara, L. E., Le Pennec, Jean-Luc, Lara, Luis, E.   +6 more
core   +1 more source

Explaining the origin of deposit-derived pyroclastic density currents

Bulletin of Volcanology
Abstract Pyroclastic density currents (PDCs) generated by the collapse of incandescent volcanic deposits represent a widespread but poorly understood hazard at active volcanoes. Their dynamics remain less constrained than those of dome- or column-collapse PDCs.
Federico Di Traglia, Alessia Falasconi, Lorenzo Borselli   +2 more
openaire   +1 more source

Eruption chemistry recorded by accretionary lapilli within pyroclastic density current deposits, Kilchrist, Isle of Skye, NW Scotland

Accretionary lapilli evolution remains controversial. Based on field, modelling and rare geochemical studies most workers argue for formation and growth within an eruption plume, although recent studies suggest formation within a pyroclastic density ...
Drake, Simon M., Brown, D., Beard, Andy
core  

The influence of moisture on pyroclastic density current dynamics and deposits: implications for understanding volcanic stratigraphy

Pyroclastic Density Currents (PDCs) are hazardous, multiphase currents of heterogeneous volcanic material and fluid. Moisture can enter a PDC system through internal (e.g., pre-eruptive) or through external processes during transport.
Walding, Nemi
core   +1 more source

Geology, Archaeology, and Historical Studies of the Late 16th Century Plinian Eruption of Raung Volcano: A Potential Case for Disaster Geotourism in Ijen UNESCO Global Geopark, East Java, Indonesia

Geosciences
The enigmatic major eruption in the late 16th century, believed to have originated from Raung, the most active stratovolcano in the Ijen UNESCO Global Geopark in East Java, Indonesia, has ignited significant debate among researchers and historians due to
Firman Sauqi Nur Sabila, Mirzam Abdurrachman, Asep Saepuloh, Idham Andri Kurniawan, Abdillah Baraas, Dwi Fitri Yudiantoro, Hery Kusdaryanto   +6 more
doaj   +1 more source

First in-situ observation of a moving natural pyroclastic density current using Doppler radar. [PDF]

Sci Rep, 2019
Scharff L, Hort M, Varley NR.
europepmc   +1 more source

Transient Dynamics in Particle‐laden Density Currents: Insights Into Dilute Pyroclastic Density Current Runout

Pyroclastic density currents (PDCs) are complex, multiphase systems where density strati cation controls the ows' mixing, deposition, and runout, presenting signi cant challenges in hazard forecasting.
Cerminara, Matteo, Breard, Eric, O'Donnell, Sean, Dufek, Josef   +3 more
core   +1 more source