Results 131 to 140 of about 46,249 (173)

Solidification of Magmas in Lava Lakes

2023
Erupting volcanoes flow sometimes into pit craters located around them and form lava lakes. After volcanic eruption stops, magmas in these pit craters start to solidify and release latent heat of fusion to the atmosphere from its solidified surface. It can take years to complete solidification of the liquid magma in some deep pit craters.
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Eruptive behavior of the Marum/Mbwelesu lava lake, Vanuatu and comparisons with lava lakes on Earth and Io

Journal of Volcanology and Geothermal Research, 2016
Abstract Observations from field remote sensing of the morphology, kinematics and temperature of the Marum/Mbwelesu lava lake in the Vanuatu archipelago in 2014 reveal a highly active, vigorously erupting lava lake. Active degassing and fountaining observed at the ~ 50 m lava lake led to large areas of fully exposed lavas and rapid (~ 5 m/s) movement
Jani Radebaugh, Rosaly M. Lopes, Robert R. Howell, Ralph D. Lorenz, Elizabeth P. Turtle   +4 more
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Lava lake rises at dangerous African volcano

Science, 2020
Funding for volcano's lone monitoring station lost as warning signs flash.
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Field temperature measurements at Erta'Ale Lava Lake, Ethiopia

Bulletin of Volcanology, 2002
The shield volcano Erta'Ale, situated in the Danakil Depression, Ethiopia, is known for its active lava lake. In February 2001, our team visited this lake, located inside an 80-m-deep pit, to perform field temperature measurements. The distribution and variation of temperature inside the lake were obtained on the basis of infrared radiation ...
Pierre-Yves Burgi, Marc Caillet, Steven Haefeli   +2 more
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Pulsatory magma supply to a phonolite lava lake

Earth and Planetary Science Letters, 2009
Abstract A few lava lakes, like that at Erebus volcano, Antarctica, have been continuously active for decades, reaching a steady-state. We report spectroscopic and thermal observations from Erebus that reveal remarkable, phase-locked cycles of lava lake convection and gas plume composition.
Clive Oppenheimer, Alexandra S. Lomakina, Philip R. Kyle, Nick G. Kingsbury, Marie Boichu   +4 more
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Solidification in Kilauea Iki lava lake

Journal of Volcanology and Geothermal Research, 1980
The crust of Kilauea Iki lava lake currently consists of an upper porous two-phase (water/steam) convection zone 41 m thick and a lower conduction zone 12 m thick extending to the melt. Although the solidification of the crust initially followed the classical square root of time law, the crust has been solidifying at a constant rate of 6.7 X 10−8m/s ...
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Lava lakes on Io: New perspectives from modeling

Icarus, 2008
Abstract Loki Patera (310° W, 12° N) is Io's largest patera at ∼180 km in diameter. Its morphology and distinct thermal behavior have led researchers to hypothesize that Loki Patera may either be an active lava lake that experiences periodic overturn, or a shallow depression whose floor is episodically resurfaced with thin flows.
Tracy K.P. Gregg, Rosaly M. Lopes
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Identification of variable convective regimes at Erta Ale Lava Lake

Journal of Volcanology and Geothermal Research, 2005
Abstract During February 17–19, 2002, we collected a combined thermal and seismic data set for persistent lava lake activity at Erta Ale volcano, Ethiopia. These data indicate that the lake cycled between periods characterized by low (0.01–0.08 m s −1 ) and high (0.1–0.4 m s −1 ) surface velocities, typically lasting tens to hundreds of minutes ...
A. J. HARRIS, CARNIEL, Roberto, J. JONES
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Permanent lava lakes: observed facts and induced mechanisms

Journal of Volcanology and Geothermal Research, 1994
Abstract Permanent lava lakes are a quite unusual eruptive feature. Only half a dozen have so far been discovered and more or less closely studied. Only two presently exist. Lava lakes (that differ basically from temporary lava ponds or lava pools) are of great significance because they allow close observations of important phenomena accompanying ...
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Mt. Niragongo: renewed activity of the lava lake

Journal of Volcanology and Geothermal Research, 1984
Abstract On the 21st of June, 1982, Mt. Niragongo ended a period of dormancy that had begun on January 11, 1977, and fresh lava began to flow into the 800-m-deep crater. On October 3, a huge lava lake, wider and deeper than any previously observed (500 m across and close to 400 m deep) rose to within 440 m of the crater rim.
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