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OVDAS-SERNAGEOMIN reported that satellite imagery and an area web camera showed no plumes rising from Cerro Hudson during 7-15 November. Seismic activity decreased significantly, reaching a low level characterized by no more than four earthquakes per hour and the absence of tremor. The Alert Level remained at Yellow, Level 4.

Source: Servicio Nacional de Geologa y Minera (SERNAGEOMIN)

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Read more http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20111116#hudson

 

Based on seismicity during 16-20 November, OVDAS-SERNAGEOMIN reported that the eruption from the Cordn Caulle rift zone, part of the Puyehue-Cordn Caulle volcanic complex, continued at a low level. Cloud cover prevented web camera views on 16 November, but satellite imagery showed an ash plume drifting 100 km SW and sparse ashfall to the E. During 18-20 November plumes observed with the web camera rose 2.5-3 km above the crater. Satellite imagery showed ash clouds drifting E and SE on 18 November and an ash plume drifting 250 km SE on 19 November. During the night on 20 November the crater was incandescent. Cloud cover prevented observations on 21 November. The Alert Level remained at Red.According to a news article, flights in Uruguay and Argentina were disrupted or cancelled on 22 November due to the presence of ash.

Sources: Servicio Nacional de Geologa y Minera (SERNAGEOMIN), Agence France-Presse

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Read more http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20111116#puyehue

 
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