Results 251 to 260 of about 70,364 (285)

Dynamics of deep-submarine explosive eruptions

2022
<div>Deposits from explosive submarine eruptions have been found in several deep-sea locations, with both flow and fall deposits of small clasts, 1-3mm, extending 1000’s m over the seafloor. Here we propose that after mixing with seawater, the erupting fragmented material typically forms a negatively buoyant fountain.
Eric Newland, Nicola Mingotti, Andrew Woods   +2 more
openaire   +1 more source

The role of syn-eruptive crystallization on pantelleritic eruptive dynamics

2020
<p>Pantellerites are strongly peralkaline rhyolites occurring mainly in extensional tectonic setting, from oceanic islands (Ascension Island) to continental rift zones, as for example Pantelleria Island in the Sicily channel rift zone, Kenyan and Ethiopian Rift Valleys and Mayor Island (NZ-Taupo Volcanic Zone). Peralkaline magmas
paola stabile, Ernestina Appiah, Michael Robert Carroll   +2 more
openaire   +1 more source

Eruptive dynamics are common in managed mammal populations

Ecology, 2020
AbstractSuccessful conservation management is often based on the principle that small or declining populations can recover if we identify and remove the factors that caused them to decline in the first place. But what form will that recovery take? Theory tells us that when a strong limiting factor is removed, a population should increase in size to ...
Richard P. Duncan, Nick Dexter, Adrian Wayne, Jim Hone   +3 more
openaire   +2 more sources

Explosive dynamics of violent Strombolian eruptions: The eruption of Parícutin Volcano 1943–1952 (Mexico)

Earth and Planetary Science Letters, 2008
Violent Strombolian is a term that was originally used by MacDonald [Macdonald, G.A., 1972. Volcanoes, Prentice-Hall inc., Englewood Cliffs, New Jersey, 510 pp.] to describe energetic Strombolian eruptions such as some of the more explosive phases of the 1943–1952 eruption of Paricutin Volcano (Michoacan, central Mexico), eruptions that disperse ...
L. PIOLI, E. ERLUND, E. JOHNSON, K. CASHMAN, P. WALLACE, ROSI, MAURO, H. DELGADO GRANADOS   +6 more
openaire   +3 more sources

The dynamics of explosive volcanic eruptions

Reviews of Geophysics, 1995
Explosive volcanic eruptions involve the ejection of dense mixtures of ash and gas from a volcanic vent at high speed and pressure. This mixture is generated as liquid magma rises from a crustal magma chamber and decompresses, exsolving water vapor. As gas is exsolved, the mixture inflates, accelerates, and becomes foam‐like.
openaire   +1 more source

Dynamics of Erupting Magnetic Flux Tubes

1994
The eruption of magnetic flux tubes from the overshoot layer due to instability and the dynamics of their subsequent rise through the solar convection zone are followed by numerical simulation. Special emphasis is put on the possibility of explaining observed regularities of the active regions at the surface (tilt angles, latitude of emergence ...
F. Moreno-Insertis, M. Schüssler, P. Caligari   +2 more
openaire   +1 more source

Complex changes in eruption dynamics during the 79 AD eruption of Vesuvius

Bulletin of Volcanology, 2004
The 79 AD eruption of Vesuvius included 8 eruption units (EU1–8) and several complex transitions in eruptive style. This study focuses on two important transitions: (1) the abrupt change from white to gray pumice during the Plinian phase of the eruption (EU2 to EU3) and (2) the shift from sustained Plinian activity to the onset of caldera collapse (EU3
L. GURIOLI, B. F. HOUGHTON, K. V. CASHMAN, CIONI, RAFFAELLO   +3 more
openaire   +1 more source

Magma degassing and eruption dynamics of the Avellino pumice Plinian eruption of Somma–Vesuvius (Italy). Comparison with the Pompeii eruption

Earth and Planetary Science Letters, 2012
Abstract The eruptive history of Mt. Somma–Vesuvius is characterised by large explosive events: Pomici di Base eruption (22,030 ± 175 yr cal BP), Mercato (8890 ± 90 yr cal BP), Avellino (3945 ± 10 yr cal BP) and Pompeii (79 AD). Pre-eruptive conditions and sin-eruptive degassing processes of the Avellino eruption, the highest-magnitude Plinian event,
Balcone-Boissard, Hélène, Boudon, Georges, Ucciani, G., Villemant, Benoît, Cioni, R., Civetta, L., Orsi, G.   +6 more
openaire   +2 more sources

Morphology, temperature, and eruption dynamics at Pele

Icarus, 2011
Abstract The Pele region of Io has been the site of vigorous volcanic activity from the time of the first Voyager I observations in 1979 up through the final Galileo ones in 2001. There is high-temperature thermal emission from a visibly dark area that is thought to be a rapidly overturning lava lake, and is also the source of a large sulfur-rich ...
Robert R. Howell, Rosaly M.C. Lopes
openaire   +1 more source

Complex changes in eruption dynamics during 79 AD eruption of Vesuvius.

2005
The 79 AD eruption of Vesuvius included 8 eruption units (EU1–8) and several complex transitions in eruptive style. This study focuses on two important transitions: (1) the abrupt change from white to gray pumice during the Plinian phase of the eruption (EU2 to EU3) and (2) the shift from sustained Plinian activity to the onset of caldera collapse (EU3
Gurioli L, Houghton BF, Cashman KV, Cioni R   +3 more
openaire   +2 more sources