Results 41 to 50 of about 6,961 (274)

Deep Magma Transport Control on the Size and Evolution of Explosive Volcanic Eruptions

Frontiers in Earth Science, 2021
Explosive eruptions are the surface manifestation of dynamics that involve transfer of magma from the underground regions of magma accumulation. Evidence of the involvement of compositionally different magmas from different reservoirs is continuously ...
Simone Colucci, Paolo Papale
doaj   +1 more source

Understanding the plume dynamics of explosive super-eruptions [PDF]

Nature Communications, 2018
AbstractExplosive super-eruptions can erupt up to thousands of km3 of magma with extremely high mass flow rates (MFR). The plume dynamics of these super-eruptions are still poorly understood. To understand the processes operating in these plumes we used a fluid-dynamical model to simulate what happens at a range of MFR, from values generating intense ...
Antonio Costa, Yujiro J. Suzuki, Takehiro Koyaguchi   +2 more
openaire   +3 more sources

Temporal variations of magma composition, eruption style and rate at Fuji Volcano, Japan

Earth, Planets and Space, 2021
Mt. Fuji is an active basaltic volcano near the Tokyo metropolitan area; future eruptions could thus have serious nationwide impacts. To better understand recent volcanism at Fuji Volcano, we here clarify temporal variations of eruption rate and magma ...
Takahiro Yamamoto, Shun Nakano, Yoshihiro Ishizuka   +2 more
doaj   +1 more source

Atmospheric impact of the 1783-1784 Laki eruption: Part I Chemistry modelling. [PDF]

, 2003
Results from the first chemistry-transport model study of the impact of the 1783–1784 Laki fissure eruption (Iceland: 64°N, 17°W) upon atmospheric composition are presented.
Stevenson, D. S.; id_orcid, Stevenson, D. S., D. S. Stevenson, Derwent, R. G., Highwood, E.J., W. J. Collins, C. E. Johnson, V. Gauci, Johnson, C.E., Derwent, R.G., E. J. Highwood, Highwood, E. J., Collins, W. J., Stevenson, D.S., R. G. Derwent, Johnson, C. E., Collins, W.J., Gauci, V.   +17 more
core   +1 more source

Volcanological challenges to understanding explosive large-scale eruptions

Earth, Planets and Space, 2020
An explosive eruption, associated with the formation of a large ignimbrite sheet and collapsed caldera, is the most severe volcanic disaster on Earth.
Nobuo Geshi
doaj   +1 more source

Explosive Behavior of Intermediate Magmas: The Example of Cotopaxi Volcano (Ecuador)

Geochemistry, Geophysics, Geosystems, 2021
The variability in intensity and style shown by explosive volcanism has been traditionally explained by a complex interplay among melt composition and pre‐eruptive volatile content, which modulate magma ascent and conduit dynamics. However, magmas having
M. Pistolesi, A. Aravena, L. Costantini, C. Vigiani, R. Cioni, C. Bonadonna   +5 more
doaj   +1 more source

Sulfur as a binding agent of aggregates in explosive eruptions [PDF]

Bulletin of Volcanology, 2014
Understanding the mechanisms that govern ash aggregation is of critical importance in volcanology. Aggregation reduces the residence time of ash (≤2 mm) in the atmosphere strongly, by enhancing the sedimentation of finer-grained material generated during explosive eruptions.
Teresa Scolamacchia, Donald B. Dingwell
openaire   +2 more sources

High-latitude eruptions cast shadow over the African monsoon and the flow of the Nile [PDF]

, 2006
Nile River records indicate very low flow following the 1783–1784 Laki volcanic eruption, as well as after other high-latitude volcanic eruptions. As shown by climate model simulations of the Laki eruption, significant cooling (−1° to −3°C) of the ...
Robock, A., Oman, L., Stenchikov, G. L., Thordarson, T.   +3 more
core   +1 more source

Magma reservoir growth and ground deformation preceding the 79 CE Plinian eruption of Vesuvius

Communications Earth & Environment, 2023
The 79 CE eruption of Vesuvius is the first documented Plinian eruption, also famous for the archaeological ruins of Pompeii and Herculaneum. Although much is known regarding the eruption dynamics and magma reservoir, little is known about the reservoir ...
Domenico M. Doronzo, Elisa Trasatti, Ilenia Arienzo, Hélène Balcone-Boissard, Diana Barra, Giuseppe Aiello, Vincenzo Amato, Mauro A. Di Vito   +7 more
doaj   +1 more source

The origin of pelletal lapilli in explosive kimberlite eruptions [PDF]

Nature Communications, 2012
Kimberlites are volatile-rich magmas from mantle depths of ≥ 150  km and are the primary source of diamonds. Kimberlite volcanism involves the formation of diverging pipes or diatremes, which are the locus of high-intensity explosive eruptions. A conspicuous and previously enigmatic feature of diatreme fills are 'pelletal lapilli'--well-rounded clasts ...
Gernon, Thomas M., Brown, Richard J., Tait, Mark A., Hincks, Thea K.   +3 more
openaire   +4 more sources