article_snippet.sent: Unexpected: the volcano last erupted in 1972, and while the volcano is widely believed to be among Chile's most dangerous, it was not under observation before it erupted today (the 'apocalypse-like' eruption pictured from Puerto Varas)
article_snippet.sent: Volcano Calbuco's last major eruption happened in 1961, with a weak eruption following in 1972.
article_snippet.sent: The eruption was in 1961 when lava flows filled the top crater before spilling down the sides and into a nearby lake.
article_snippet.sent: There was another minor eruption in 1972 .
highlights_snippet.sent: It is the first time Volcano has been active since 1972, and the first major eruption there since 1961 .
  