Results 71 to 80 of about 29,420 (201)

Recent eruption history inferred from eruption ages of the two latest lava flows using multi-dating at Yokodake Volcano, Japan

open access: yesEarth, Planets and Space, 2020
Reconstruction of the eruption history of an active volcano is necessary to elucidate its volcanic activity and to assess the probability of its volcanic eruption. Yokodake volcano in central Japan is the only active volcano among the Yatsugatake volcano
Hiroya Nitta   +2 more
doaj   +1 more source

Magmatic volatiles in explosive rhyolitic eruptions

open access: yesGeophysical Research Letters, 1981
Obsidian clasts in rhyolitic tephra deposits preserve preemption magmatic volatile contents, providing a direct means for determining the volatile content of explosively erupted magmas. Small to moderate volume Plinian eruptions (10−3 to 10−1 km³) appear to be driven by 0.5‐1.0 wt.% volatiles, consisting dominantly of H2O with minor CO2.
J. C. Eichelberger, H. R. Westrich
openaire   +1 more source

The Spectral Temperature of Optically Thick Outflows with Application to Light Echo Spectra from $\eta$~Carinae's Giant Eruption

open access: yes, 2016
The detection by Rest et al. (2012) of light echoes from $\eta$ Carinae has provided important new observational constraints on the nature of its 1840's era giant eruption.
Owocki, Stanley P., Shaviv, Nir J.
core   +1 more source

Hiroshi Machida −respected tephrochronologist, teacher, leader [PDF]

open access: yes, 2011
Professor Emeritus Hiroshi Machida (Hiroshi hereafter) is the leading tephrochronologist of his generation in Japan. Perhaps more than any other geoscientist from Japan, Hiroshi carried the insights and advances of tephra studies and their application in
Lowe, David J.   +2 more
core   +2 more sources

Earth's rotation variability triggers explosive eruptions in subduction zones [PDF]

open access: yes, 2015
The uneven Earth’s spinning has been reported to affect geological processes, i.e. tectonism, seismicity and volcanism, on a planetary scale. Here, we show that changes of the length of day (LOD) influence eruptive activity at subduction margins ...
CUFFARO, Marco   +3 more
core   +2 more sources

Giant offshore pumice deposit records a shallow submarine explosive eruption of ancestral Santorini

open access: yesCommunications Earth & Environment
Large explosive volcanic eruptions from island arcs pour pyroclastic currents into marine basins, impacting ecosystems and generating tsunamis that threaten coastal communities and infrastructures.
Tim Druitt   +36 more
doaj   +1 more source

Volcaniclastic Dispersal During Submarine Lava Effusion: The 2012 Eruption of Havre Volcano, Kermadec Arc, New Zealand

open access: yesFrontiers in Earth Science, 2020
Understanding clast dispersal from subaqueous volcanism is hampered by uncertainty in the source and extent of seafloor deposits. Extensive sampling in situ of seafloor deposits from the 2012 submarine eruption of Havre volcano provides an ideal ...
Arran P. Murch   +6 more
doaj   +1 more source

Ash plume properties retrieved from infrared images: a forward and inverse modeling approach

open access: yes, 2014
We present a coupled fluid-dynamic and electromagnetic model for volcanic ash plumes. In a forward approach, the model is able to simulate the plume dynamics from prescribed input flow conditions and generate the corresponding synthetic thermal infrared (
Cerminara, Matteo   +3 more
core   +3 more sources

TWO-DIMENSIONAL SIMULATIONS OF EXPLOSIVE ERUPTIONS OF KICK-EM JENNY AND OTHER SUBMARINE VOLCANOS [PDF]

open access: yesScience of Tsunami Hazards, 2006
Kick-em Jenny, in the Eastern Caribbean, is a submerged volcanic cone that has erupted a dozen or more times since its discovery in 1939. The most likely hazard posed by this volcano is to shipping in the immediate vicinity (through volcanic missiles or ...
Galen Gisler   +2 more
doaj  

Halogen (Cl, F) release during explosive, effusive, and intrusive phases of the 2011 rhyolitic eruption at Cordón Caulle volcano (Chile)

open access: yesVolcanica, 2019
We investigate sulphur, chlorine and fluorine release during explosive, effusive and intrusive phases the 2011 Cordón Caulle eruption, with a focus on halogen devolatilization. Petrological analysis shows halogen release to have been promoted by isobaric
C Ian Schipper   +8 more
doaj   +1 more source

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