Results 111 to 120 of about 6,961 (274)
Detailed observations of the 2010 Eyjafjallajökull eruptions in Iceland show seismic activity propagating vertically through the entire crust during a ten-week period of volcanic unrest comprising multiple eruption episodes.
White, R. S. +4 more
core +1 more source
Survival of the Mýrdalsjökull ice cap through the Holocene thermal maximum: evidence from sulphur contents in Katla tephra layers (Iceland) from the last ∼8400 years [PDF]
, 2007 The climate in Iceland was drier and warmer during the Holocene thermal maximum than it is today and it has been suggested that ice caps disappeared entirely.
Larsen, G. +5 more
core +1 more source
A volcanic degassing event at the explosive-effusive transition
Petrology igneous metamorphic and volcanic studies ...
Edmonds, M., Herd, R. A.
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Mass and energy budgets of explosive volcanic eruptions
Geophysical Research Letters, 1995 Analysis of the frequency‐size relationship of explosive volcanic eruptions for the past 2000 years reveals that the time‐averaged eruptive mass flux of tephra from subaerial explosive eruptions is 3×104 kg s−1. This mass flux corresponds to a thermal energy release of 4×1010 W.
openaire +1 more source
Magmatic volatiles in explosive rhyolitic eruptions
Geophysical 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
Geophysical fingerprint of the 4–11 July 2024 eruptive activity at Stromboli volcano, Italy [PDF]
Natural Hazards and Earth System SciencesParoxysmal eruptions, characterized by sudden and vigorous explosive activity, are frequent at open-vent volcanoes. Stromboli volcano, Italy, is well known for its nearly continuous degassing activity and mild explosions from the summit craters ...
L. Zuccarello +7 more
doaj +1 more source
Eruptions from Under-Ice Explosions [PDF]
, 1988 Abstract : Eruptions from under-ice explosions were recorded by a standard video camera and an ordinary motor-driven 35-mm camera. The records give the dimensions and velocities of the eruptions. Velocity, diameter, and height are related to charge depth and the results are compared with data for ordinary underwater explosions in ice-free water.
David L'Heureux, Malcolm Mellor
openaire +1 more source
Combined effusive-explosive silicic volcanism straddles the multiphase viscous-to-brittle transition
Nature Communications, 2018 Recent observations of silicic eruptions show that they can be both effusive and explosive at the same time. Here the authors use scaled experiments to demonstrate that magma in effusive eruptions will fracture during flow to the Earth’s surface ...
Fabian B. Wadsworth +7 more
doaj +1 more source
Electric charge within volcanic plumes on Earth and Io [PDF]
, 1998 Field, experimental and theoretical investigations have been carried out into the electrification of volcanic plumes. At Sakurajima volcano, Japan, ground-level perturbations of the atmospheric electric potential gradient generated by particulate plumes ...
James, M.R., James, M. R.
core
Ash production by attrition in volcanic conduits and plumes
Scientific Reports, 2017 Tephra deposits result from explosive volcanic eruption and serve as indirect probes into fragmentation processes operating in subsurface volcanic conduits.
T. J. Jones, J. K. Russell
doaj +1 more source