publication . Article . 2004

The 2000 AD eruption of Copahue Volcano, Southern Andes

Naranjo, JA; Polanco, E;
Open Access English
  • Published: 01 Dec 2004
  • Publisher: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
  • Country: Chile
Abstract
Although all historic eruptions of the Copahue volcano (37°45'S-71°10.2'W, 3,001 m a.s.l.) have been of low magnitude, the largest (VEI=2) and longest eruptive cycle occurred from July to October 2000. Phreatic phases characterized the main events as a former acid crater lake was blown up. Low altitude columns were deviated by low altitude winds in variable directions, but slightly predominant to the NNE. The presence of the El Agrio caldera depression to the east of Copahue volcano may have caused the variable plume divergences and disturb the prevailing wind direction which is normally to the southeast. Larger magnitude events, comparable to prehistoric erupti...
Subjects
free text keywords: Volcanic hazards, Explosive volcanism, Holocene, Copahue volcano, Andes, Chile, Argentina, Peligros volcánicos, Volcanismo explosivo, Holoceno, Volcán Copahue, Geology, Volcano, geography.geographical_feature_category, geography, Local population, Magnitude (mathematics), Caldera, Phreatic, Plume, Prevailing winds, Paleontology, Crater lake
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