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World Volcano Activity UPDATE !!! MARAPI AGAIN!!! KATLA AGAIN!!! SWARM STARTING IN ICELAND DORMANT VOLCANO Bláfjoll!!!
Ms Sans Serif
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[quote:Luisport:MV8xNzU0NjcwXzMzNjU4NzE3X0VCNzdGRDE0] Renato Rio says: September 27, 2012 at 16:37 Another interesting volvano showing intense geothermal activity righy now (GVP): “Volcán Copahue is an elongated composite cone constructed along the Chile-Argentina border within the 6.5 x 8.5 km wide Trapa-Trapa caldera that formed between 0.6 and 0.4 million years ago near the NW margin of the 20 x 15 km Pliocene Caviahue (Del Agrio) caldera. The eastern summit crater, part of a 2-km-long, ENE-WSW line of nine craters, contains a briny, acidic 300-m-wide crater lake (also referred to as El Agrio or Del Agrio) and displays intense fumarolic activity. Acidic hot springs occur below the eastern outlet of the crater lake, contributing to the acidity of the Río Agrio, and another geothermal zone is located within Caviahue caldera about 7 km NE of the summit. Infrequent mild-to-moderate explosive eruptions have been recorded at Copahue since the 18th century. Twentieth-century eruptions from the crater lake have ejected pyroclastic rocks and chilled liquid sulfur fragments.” http://volcanocafe.wordpress.com/2012/09/27/did-you-notice-the-erupting-supervolcano/ [/quote]
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