Impending super eruption ?

[link to www.indiadaily.com]

Vilama Caldera in Argentina showing signs of harmonic tremor – signs of a mega volcano in 2012?
India Daily Technology Team
Aug. 24, 2007

A supervolcano hidden in a veritable mega-volcano nursery called the Eduardo Avaroa Caldera Complex, located in the inhospitable Puna-Altiplano region near the tri-section of Argentina, Bolivia, and Chile is a major focus of many volcano experts in recent days.

The harmonic tremor is appreciating in a cyclical way. There are signs of trouble ahead. An extrapolation in the time axis points to a possible mega eruption in 2012.

Vilama Caldera formed during a single event that emitted approximately 2000 cubic kilometers (almost 500 cubic miles) of pyroclastic material," said geologist Miguel M. Soler of the National University of Jujuy in San Salvador de Jujuy, Argentina. The volume of ash and pyroclastic material, called ignimbrites, produced by the 8.4 million-year-old eruption, and the size of the associated caldera, put it among the world’s largest known eruptions.

The Vilama Caldera appears to have been created when the 10 by 24-mile roof catastrophically collapsed on a chamber of molten rock, or magma, explosively venting vast amounts of ignimbrites out in various directions. That massive roof collapse is the one thing all large calderas have in common and what separates them from the exponentially smaller "single vent" volcanic eruptions like Mount St. Helens or Mount Pinatubo.