Results 41 to 50 of about 29,420 (201)

Havre 2012 pink pumice is evidence of a short-lived, deep-sea, magnetite nanolite-driven explosive eruption

open access: yesCommunications Earth & Environment, 2022
Pink and white raft pumice from the 2012 Havre deep-sea eruption experienced prolonged high-temperature atmospheric oxidation of magnetite to hematite which suggests a short but powerful explosive phase, according to microanalytical investigation.
Joseph Knafelc   +8 more
doaj   +1 more source

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

open access: yesFrontiers 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

Volcano remote sensing with ground-based spectroscopy [PDF]

open access: yes, 2005
The chemical compositions and emission rates of volcanic gases carry important information about underground magmatic and hydrothermal conditions, with application in eruption forecasting.
Burton M.R   +5 more
core   +1 more source

Observation of An Evolving Magnetic Flux Rope Prior To and During A Solar Eruption

open access: yes, 2012
Explosive energy release is a common phenomenon occurring in magnetized plasma systems ranging from laboratories, Earth's magnetosphere, the solar corona and astrophysical environments.
B Kliem   +25 more
core   +1 more source

Modelling of bubble nucleation in trachy-phonolitic magmas: implications for the dynamics of ash-rich eruptions [PDF]

open access: yes, 2012
Nucleation of water gas bubbles in trachyphonolitic magmatic melts has been investigated integrating theory and numerical modelling with decompression experiments and analysis of natural ash samples of explosive eruptions.
Colucci, Simone
core   +1 more source

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

open access: yesEarth, 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   +2 more
doaj   +1 more source

Volcanological challenges to understanding explosive large-scale eruptions

open access: yesEarth, 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)

open access: yesGeochemistry, 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   +5 more
doaj   +1 more source

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

open access: yesCommunications 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   +7 more
doaj   +1 more source

Monitoring SO2 emission at the Soufriere Hills Volcano: implications for changes in erruptive conditions [PDF]

open access: yes, 1998
FLWINinfo:eu-repo/semantics ...
A. J. H. Maciejewski   +31 more
core   +1 more source

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