Results 21 to 30 of about 29,714 (250)

Models of ice melting and edifice growth during subglacial basaltic eruptions. [PDF]

, 2007
Models of the early stages of basaltic eruptions beneath temperate glaciers are presented that consider the evolving sizes of volcanic edifices emplaced within subglacial cavities.
Tuffen, Hugh
core   +1 more source

Maars to calderas. End-members on a spectrum of explosive volcanic depressions [PDF]

, 2015
We discuss maar-diatremes and calderas as end-members on a spectrum of negative volcanic landforms (depressions) produced by explosive eruptions (note—we focus on calderas formed during explosive eruptions, recognizing that some caldera types are not ...
Palladino, Danilo Mauro, Sottili, Gianluca, Taddeucci, J., Valentine, G. A.   +3 more
core   +1 more source

Radiative and climate impacts of a large volcanic eruption during stratospheric sulfur geoengineering [PDF]

Atmospheric Chemistry and Physics, 2016
Both explosive volcanic eruptions, which emit sulfur dioxide into the stratosphere, and stratospheric geoengineering via sulfur injections can potentially cool the climate by increasing the amount of scattering particles in the atmosphere. Here we employ
A. Laakso, H. Kokkola, A.-I. Partanen, A.-I. Partanen, U. Niemeier, C. Timmreck, K. E. J. Lehtinen, K. E. J. Lehtinen, H. Hakkarainen, H. Korhonen   +9 more
doaj   +1 more source

Explosion depths for phreatomagmatic eruptions [PDF]

Geophysical Research Letters, 2014
Subsurface phreatomagmatic explosions can result from the interaction of ascending magma with groundwater. Experiments over a wide range of energies show that for a given energy there is a depth below which an explosion will be contained within the subsurface (not erupt), and there is a corresponding shallower depth that will optimize ejecta dispersal.
Greg A. Valentine, Alison H. Graettinger, Ingo Sonder   +2 more
openaire   +1 more source

Laboratory studies on electrical effects during volcanic eruptions

Annals of Geophysics, 1999
This laboratory study reports on electrical phenomena during the explosive eruption of a basaltoid silicate melt. Contact electricity is produced in the phase of thermo-hydraulic fracturing of magma during the explosive interaction with water.
R. Büttner, B. Zimanowski, H. Röder
doaj   +1 more source

Probabilistic Source Classification of Large Tephra Producing Eruptions Using Supervised Machine Learning: An Example From the Alaska‐Aleutian Arc

Geochemistry, Geophysics, Geosystems, 2023
Alaska contains over 130 volcanoes and volcanic fields that have been active within the last 2 million years. Of these, roughly 90 have erupted during the Holocene, with many characterized by at least one large explosive eruption.
Jordan Lubbers, Matthew Loewen, Kristi Wallace, Michelle Coombs, Jason Addison   +4 more
doaj   +1 more source

Charge structure in volcanic plumes: a comparison of plume properties predicted by an integral plume model to observations of volcanic lightning during the 2010 eruption of Eyjafjallajökull, Iceland [PDF]

, 2014
Cancer is a heterogeneous disease with different combinations of genetic alterations driving its development in different individuals. We introduce CoMEt, an algorithm to identify combinations of alterations that exhibit a pattern of mutual exclusivity ...
AJ Bass, CH Yeang, D Hanahan, E Szczurek, F Vandin, G Ciriello, MDM Leiserson, TCGAR Network   +7 more
core   +8 more sources

Deep Sea Explosive Eruptions may be not so Different from Subaerial Eruptions [PDF]

Goldschmidt Abstracts, 2020
AbstractThe dynamics of deep sea explosive eruptions, the dispersion of the pyroclasts, and how submarine eruptions differ from the subaerial ones are still poorly known due to the limited access to sea environments. Here, we analyze two ash layers representative of the proximal and distal deposits of two submarine eruptions from a 500 to 800 m deep ...
Iezzi Gianluca, Lanzafame Gabriele, Mancini Lucia, Behrens Harald, Tamburrino Stella, Vallefuoco Mattia, Passaro Salvatore, Signanini Patrizio, Ventura Guido   +8 more
openaire   +5 more sources

Evidence of mid- to late-Holocene explosive rhyolitic eruptions from Chaitén Volcano, Chile

Andean Geology, 2013
The 2008 eruption of Chaitén Volcano was widely cited as the first activity at the volcano for over 9000 years. However, we have identified evidence from proximal pyroclastic deposits for three additional explosive eruptions of Chaitén within the past ...
Sebastian F.L. Watt, David M. Pyle, Tamsin A. Mather   +2 more
doaj   +1 more source

Explosive Volcanic Eruptions--III. Plinian Eruption Columns [PDF]

Geophysical Journal International, 1976
The mechanisms controlling the transport of pyroclasts in a plinian‐type eruption column are discussed. An estimate is made of the density of the magmatic gas in the vent, and initial (‘muzzle’) velocities are deduced for 18 eruptions using the a real distribution of pyroclasts in the resulting air‐fall deposits.
openaire   +1 more source