Results 81 to 90 of about 624,031 (203)

The Magnitude of the 39.8 ka Campanian Ignimbrite Eruption, Italy: Method, Uncertainties and Errors

Frontiers in Earth Science, 2020
The calculation of the magnitude of an eruption needs the accurate estimate of its deposit volume. This is particularly critical for ignimbrites as no methods for their volume calculations and associated errors and uncertainties are consolidated in the ...
Aurora Silleni, Aurora Silleni, Guido Giordano, Roberto Isaia, Michael H. Ort   +4 more
doaj   +1 more source

New insights into the Upper Pleistocene directed blast eruption, Popocatépetl volcano, México

Volcanica
Volcanic eruptions of the directed blast type are characterized by powerful explosions with a significant lateral pyroclastic density current (PDC) component that can travel at speeds above 100 m s–1 and affect hundreds of square kilometers around a ...
R. Marcela Lira-Beltrán, Lizeth Caballero, Delphine Sourisseau, Gerardo Ruiz Chavarría, Geoffrey A. Lerner   +4 more
doaj   +1 more source

Complex styles of phreatomagmatic explosions at Kīlauea Volcano, Hawaii, controlled by magma structure

Frontiers in Earth Science, 2023
Explosive eruptions at basaltic volcanoes remain poorly understood. Kīlauea Volcano is a type locality for basaltic eruptions and is well-known for effusive activity.
J. Schmith, D. A. Swanson
doaj   +1 more source

Residential building and occupant vulnerability to pyroclastic density currents in explosive eruptions [PDF]

, 2007
International audienceA major hazard during the eruption of explosive volcanoes is the formation of pyroclastic density currents (PDCs). Casualties and physical building damage from PDCs are caused by the temperature, pressure, and particle load of the ...
A. Brown, D. Purser, G. Toyos, I. Kelman, I. Kelman, P. Baxter, R. Spence   +6 more
core   +2 more sources

Volcanic Ash Resuspension in Patagonia: Numerical Simulations and Observations

Atmosphere, 2020
Resuspension of pyroclastic deposits occurs under specific atmospheric and environmental conditions and typically prolongs and exacerbates the impact associated with the primary emplacement of tephra fallout and pyroclastic density current deposits.
Leonardo Mingari, Arnau Folch, Lucia Dominguez, Costanza Bonadonna   +3 more
doaj   +1 more source

Physical and morphological characterization of the 19 May 2021 ash cloud deposit at Stromboli (Italy)

Scientific Reports, 2022
We report on the ash cloud related to the gravitational collapse of a portion of the Stromboli volcano crater rim that occurred on 19 May 2021. The collapse produced a pyroclastic density current (PDC) that spread along the northwest flank of the volcano
Giuseppe Re, Massimo Pompilio, Paola Del Carlo, Alessio Di Roberto   +3 more
doaj   +1 more source

Lava channel formation during the 2001 eruption on Mount Etna: evidence for mechanical erosion [PDF]

, 2005
We report the direct observation of a peculiar lava channel that was formed near the base of a parasitic cone during the 2001 eruption on Mount Etna. Erosive processes by flowing lava are commonly attributed to thermal erosion.
Carmelo Ferlito, D. Drewry, D. A. Williams, F. J. Ciesla, F. P. Bowden, G. Hulme, H. Pinkerton, H. E. Huppert, Jens Siewert, M. S. Ghiorso, N. W. Ashcroft, S. A. Fagents, T. F. J. Quinn, W. E. Dietrich   +13 more
core   +1 more source

Formation of a spatter-rich pyroclastic density current deposit in a Neogene sequence of trachytic-mafic igneous rocks at Mason Spur, Erebus volcanic province, Antarctica

Bulletin of Volcanology, 2017
Erosion has revealed a remarkable section through the heart of a volcanic island, Mason Spur, in the southwestern Ross Sea, Antarctica, including an unusually well-exposed section of caldera fill.
A. P. Martin, J. Smellie, A. Cooper, D. Townsend   +3 more
semanticscholar   +1 more source

Assessing the volcanic hazard for Rome. 40Ar/39Ar and In-SAR constraints on the most recent eruptive activity and present-day uplift at Colli Albani Volcanic District [PDF]

, 2016
We present new 40Ar/39Ar data which allow us to refine the recurrence time for the most recent eruptive activity occurred at Colli Albani Volcanic District (CAVD) and constrain its geographic area.
Amato, Amato, B. Giaccio, B. R. Jicha, Cimini, D'Ambrosio, D. M. Palladino, Di Rocco, F. Florindo, F. Marra, Faccenna, Faccenna, Faccenna, Florindo, Freda, Frepoli, Funiciello, G. Sottili, Gaeta, Gaeta, Gaeta, Gaeta, Giaccio, Giaccio, Giaccio, Giordano, Gozzi, J. Taddeucci, Jicha, Karner, Karner, Karner, M. Gaeta, M. Polcari, Marra, Marra, Marra, Marra, Marra, Marra, Montone, Peccerillo, Rita, Rivera, S. Stramondo, Salvi, Sottili, Stramondo, Werner   +48 more
core   +1 more source

Deciphering the “Missing Xenon Paradox” in Celestial Bodies: A Multifaceted Perspective Toward Demystifying This Enigma

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Xenon (Xe) is a heavy noble gas with intriguing chemical properties, such as having several stable isotopes and the ability to form compounds under extreme conditions. Despite the predictions based on cosmochemical models that suggest xenon should be relatively abundant in planetary reservoirs, empirical data indicate a significant depletion ...
Avinash Kumar Both, Avradip Ghosh, Chin Li Cheung   +2 more
wiley   +1 more source