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Showing 1 to 7 of 7 for “"lava lake"”.
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Monitoring Erebus volcano's active lava lake; tools, techniques and observations
Active lava lakes present a rare opportunity to observe directly the complex processes occurring within a magma body. Situated on Ross Island, Antarctica, the 3794-m-high crater of Erebus volcano has hosted a phonolite lava lake for decades. Previous studies have shown that many of the lake’s …
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Petrological insights into pre- and syn-eruptive degassing at Ambrym volcano, Vanuatu
… entails heavy degassing from quasipermanent lava lakes, with Strombolian activity of fluctuating intensity. This is punctuated on an approximately decadal timescale by moderate sub-Plinian paroxysms, often accompanied by overflow of lava from the intracaldera cones and via flank fissures. …
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An unexpected journey: experimental insights into magma and volatile transport beneath Erebus volcano, Antarctica
… rocks, particularly mafic and intermediate lavas, which are thought to originate from deep within the magmatic plumbing system, have been hindered due to a lack of experimental data. Experimental petrology is a common tool used to understand volcanic plumb- ing systems and to tie …
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Integrated geophysical studies at Masaya volcano, Nicaragua
… this study. It is noted for repeated episodes of lava lake formation, strong degassing and subsequent quiescence. <br></br><br></br>Ground-based geophysical measurements show two episodes of similar magnitude gravity decreases in 1993-1994 and 1997-1999, separated by a period of minor gravity …
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Investigations of Anomalous Earthquakes at Active Volcanoes
… later in association with the refilling of the lava lake in the summit crater of the volcano. Detailed study of these events shows that the earthquakes have slower source processes than tectonic earthquakes with similar magnitudes and locations. All five earthquakes are interpreted as resulting …
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Mixing in axisymmetric gravity currents and volcanic conduits
… region of volcanic conduits connected to surface lava lakes. We derive a theoretical model to estimate the heat flux associated with such a system using the empirical law for the dispersive mixing. The predicted heat flux associated with the bubbles is found to be comparable to the heat loss at …