article_snippet.sent: the Calbuco volcano has been dormant since 1972 and neither scientists nor government officials predicted the eruption, reports Mashable.
article_snippet.sent: Volcano Calbuco, believed to be among the three most dangerous of Chile's 90 active volcanoes, had erupted for the first time at 6pm local time on Wednesday.
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 Dailymail.com it is impossible to predict what will happen next.
article_snippet.sent: the Calbuco volcano is located near the tourist town of Puerto Varas and the city of Puerto Montt, a little more than 620 miles south of Chile's capital, Santiago.
article_snippet.sent: Volcano Calbuco's last major eruption happened in 1961, with a weak eruption following in 1972.
highlights_snippet.sent: Volcano Calbuco had erupted for the first time at 6pm local time on Wednesday and has been dormant since 1972 .