article_snippet.sent: Previous and equally violent eruptions at Calbuco have continued for up to a week, according to a volcanologist from Oxford University who told MailOnline it is impossible to predict what will happen next.
article_snippet.sent: the Calbuco volcano in southern Chile is one of the most dangerous of Chile's 90 active volcanoes but was not under any special observation before the Calbuco volcano in southern Chile suddenly sprung into life at around 6pm local time yesterday.
article_snippet.sent: Chile's President Michelle Bachelet said this eruption at Calbuco is 'more serious and unpredictable' than that of the Villarica volcano which also forced the evacuation of thousands of people .
article_snippet.sent: Chile's President Michelle Bachelet said this eruption at Calbuco is 'more serious and unpredictable' than that of the Villarica volcano which also forced the evacuation of thousands of people.
article_snippet.sent: Active: Calbuco (pictured yesterday) is one of Chile's three most dangerous volcanoes and part of an active chain of around 500 that cover the south of the country .
article_snippet.sent: Calbuco (pictured yesterday)'s last major eruption happened in 1961, with a weak eruption following in 1972.
article_snippet.sent: Chile, on the PacificRim of Fire', has the second largest chain of volcanoes in the world after Indonesia, including around 500 that are potentially active.
article_snippet.sent: Blanket: the massive eruption at Calbuco volcano was in 1961 when lava flows filled the top crater before spilling down the sides and into a nearby lake .