Results 41 to 50 of about 462 (114)

Modeling of last eruption from Puyehue-Cordon Caulle volcanic complex [PDF]

, 2013
El presente trabajo está centrado en la utilización y validación del modelo Euleriano FALL3D para la simulación de la dispersión de aerosoles, durante la erupción del complejo volcánico Puyehue-Cordón Caulle, ocurrida el 4 de junio de 2011 a las 14:45 LT
Allende, David Gabriel, Mulena, Gabriela Celeste, Puliafito, Salvador Enrique   +2 more
core   +1 more source

Complex circular subsidence structures in tephra deposited on large blocks of ice: Varða tuff cone, Öræfajökull, Iceland [PDF]

, 2016
Several broadly circular structures up to 16 m in diameter, into which higher strata have sagged and locally collapsed, are present in a tephra outcrop on southwest Öræfajökull, southern Iceland.
A Geyer, A Hubbard, A Olszewski, A. J. Walker, AES Forbes, AJ Russell, B Brock, BC McDonald, BF Houghton, BN Whittaker, C Swithinbank, CH Okubo, D. W. McGarvie, E Magnússon, E Zanella, EP Holohan, FS Tweed, H Fay, H Norðdahl, H Tómasson, J Hauff, J Jónsson, J Martí, J. L. Smellie, JA Stevenson, JDL White, JE Cocksedge, JK Maizels, JK Maizels, JS Gilbert, JS Johnson, K Sharma, LO Krenek, MJ Branney, MJ Branney, MJ Branney, MJ Burke, O Roche, O Roche, PD Cole, PD Rowley, PM Marren, R Sulpizio, R. Burgess, RJ Brown, RJ Brown, RJ Carey, RME Thomas, S Burchardt, S Poppe, S Visale, SC Loughlin, TH Druitt, TR Walter, V Acocella, V Acocella, V Manville, V Zanon, WJ Russell, YK Sohn, YK Sohn, YK Sohn   +61 more
core   +2 more sources

Volcanic Radiative Power Retrieval From Moderate‐to‐Low‐Temperature Features Using a Single TIR Band: Validation Using Volcanic Crater Lakes and Hydrothermal Systems

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract Assessing Radiative Power (RP) output is essential for monitoring and understanding volcanic systems. While Mid‐Infrared channels are used to assess thermal outputs at volcanoes exhibiting effusive activity, Thermal‐InfraRed (TIR) bands are better suited for measuring moderate‐to‐low‐temperature (≲600 K) features, such as those associated with
Simone Aveni, Sophie Pailot‐Bonnétat, Dmitri Rouwet, Andrew J. L. Harris, Diego Coppola   +4 more
wiley   +1 more source

Petrologic characteristics of the 1982 and pre-1982 eruptive products of el Chichon Volcano, Chiapas, México

Geofísica Internacional, 1987
Los estudios petrográficos, macroquímicos y por microsonda de una secuencia de rocas del Volcán El Chichón, Chiapas, México, indican que los materiales “juveniles” de las erupciones de 1982 y las anteriores presentan esencialmente la misma química y la ...
J. J. Macgee, R. I. Tilling, W. A. Duffield   +2 more
doaj   +1 more source

Beyond the Average: Computation of Vertical Profiles in Dilute Pyroclastic Density Currents and Their Use in Shallow‐Water Models

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 1, January 2025.
Abstract Pyroclastic density currents (PDCs) present significant hazards due to their high temperatures and dynamic pressures. Accurate estimation of dynamic pressure, vital for assessing potential damage, requires knowledge of the vertical variations of velocity and particle concentration within the PDC, particularly in the first few meters of the ...
B. Keim, M. de’ Michieli Vitturi
wiley   +1 more source

Lidar Monitoring at mid latitude of the stratospheric aerosol perturbation produced by the El Chichón eruption

Geofísica Internacional, 1984
Reportamos mediciones lidar de la perturbación en la carga de polvo atmosférico producida por la erupción volcánica de El Chichón. Las mediciones abarcan un período de 19 meses y se toman en una estación de latitud media.
A. D´ Altorio, G. Visconti
doaj   +1 more source

Dynamics, Monitoring, and Forecasting of Tephra in the Atmosphere

Reviews of Geophysics, Volume 62, Issue 4, December 2024.
Abstract Explosive volcanic eruptions inject hot mixtures of solid particles (tephra) and gasses into the atmosphere. Entraining ambient air, these mixtures can form plumes rising tens of kilometers until they spread laterally, forming umbrella clouds. While the largest clasts tend to settle in proximity to the volcano, the smallest fragments, commonly
F. Pardini, S. Barsotti, C. Bonadonna, M. de’ Michieli Vitturi, A. Folch, L. Mastin, S. Osores, A. T. Prata   +7 more
wiley   +1 more source

Explosive volcanism: inception, evolution and hazard / National Research Council, Geophysics Study Committee

Geofísica Internacional, 1989
Este libro sobre "Volcanismo Explosivo" está formado por una colección de trece capítulos o artículos que, desde diferentes enfoques y disciplinas discuten uno de los fenómenos volcánicos de más alta peligrosidad.
J. Urrutia Fucugauchi, Ana Lilian Martin del Pozzo   +1 more
doaj   +1 more source

Sulfur budget and global climate impact of the AD 1835 eruption of Cosigüina volcano, Nicaragua [PDF]

, 2014
Large explosive volcanic eruptions can inject massive amounts of sulfuric gases into the Earth's atmosphere and, in so doing, affect global climate. The January 1835 eruption of Cosigüina volcano, Nicaragua, ranks among the Americas’ largest and most ...
Angell, Berlo, Bradley, Briffa, Budner, Chenoweth, Cole-Dai, Cole-Dai, Crowley, D'Arrigo, D'Arrigo, D'Arrigo, D'Arrigo, Delmas, Devine, Esper, Ferris, Filion, Gao, Gennaretti, Gervais, Guo, Humphreys, Jochum, Jones, Jones, Kelly, Keppler, Kutterolf, LaMarche, Lamb, Lange, Langway, Legrand, Liu, Longpré, Lowenstern, Mann, Metzner, Moore, Nadeau, Newhall, Palais, Parker, Plummer, Rampino, Robock, Rohde, Sadofsky, Salzer, Scaillet, Scott, Self, Self, Self, Shinohara, Siebert, Silva, Wallace, Wallace, Webster, Westrich, Zajacz, Zielinski   +63 more
core   +1 more source

Dwindling Effective Radiative Forcing of Large Volcanic Eruption: The Compensation Role of Ocean Latent Heat Flux

Geophysical Research Letters, Volume 51, Issue 15, 16 August 2024.
Abstract Climatic impacts of historical volcanism are principally tied to the eruption size, while observation versus model discrepancies have been commonly attributed to the uncertainties in paleo‐reconstruction or malpresentation of volcanic aerosols in models.
Ya Gao, Chaochao Gao
wiley   +1 more source