An extraordinary cloud formation is created by the ash rising several miles into the atmosphere. It was the latest in a series of volcanic eruptions in Chile in recent years. Chile's Chaiten volcano erupted spectacularly in 2008 for the first time in thousands of years, spewing molten rock and a vast cloud of ash that reached the stratosphere. The ash also swelled a nearby river and ravaged a nearby town of the same name. The ash cloud from Chaiten coated towns in Argentina and was visible from space. Chile's Llaima volcano, one of South America's most active, erupted in 2008 and 2009. Chile's chain of about 2,000 volcanoes is the world's second largest after [that of] Indonesia. Some 50 to 60 are on record as having erupted, and 500 are potentially active.