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Villarrica volcano (Chile): new deep-seated weak explosive activity detected

Sunday Jan 20, 2013 12:05 PM | BY: T

Terrestrial and satellite observations confirm that for about 2 weeks weak explosive activity deep within the summit crater has resumed and indicates that magma might have begun to rise again within the volcano.
This ends a period of more than six months of remarkable inactivity. It is expected that in the coming weeks or months incandescence will be visible again at the crater during the nights.
The activity levels are so low, that without the help of satellites it would not have been possible to detect the increase in heat from the crater.
In addition, about 2 weeks ago, the seasonal melting of ice and snow on the volcano began and produced large volumes of meltwater that drained within and at the base of glaciers. A critical mass of water might have entered the volcano's hydrothermal system. The internal heat evaporates the water in the immediate area of ​​the volcanic conduit and forms condensation on the inner walls above. The condensation phenomenon has been observed in good weather, notably on 16 and 17 January after noon.
The detailed analysis of more than 12,000 daily sequential images indicates that no ash emissions have occurred nor landslides in recent months.
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Links / Sources:
Previous news
Friday, Jan 18, 2013
Etna (Italy): Another brief, but probably strong eruptive phase - a small paroxysm - occurred on the evening of 16 Jan at Bocca Nuova. ... [more]
Friday, Jan 18, 2013
With Kamchatka currently being one of the most volcanically active places on the planet, here is a summary of the current volcanic activity in the past week in the region by the Kamchatkan Volcanic Eruption Response Team. ... [more]
Wednesday, Jan 16, 2013
Stromboli (Italy): The lava overflow that started on Monday and reached about 400 m elevation on the Sciara del Fuoco has stopped (for now). Strong explosions felt in houses in the village continue to occur frequently and tremor remains elevated. ... [more]
Active new lava flow from the effusive vent on the N side of the NE crater cone; the new breach is visible to the left of the vent
Sunday, Jan 13, 2013
Stromboli (Eolian Islands, Italy): During a larger explosion of the NE crater, part of the northern crater wall collapsed. The explosion and resulting rockfall caused a large ash and steam plume that drifted over the island and scared many of the inhabitants. ... [more]

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