JAKARTA, Indonesia—An eruption of one of Indonesia’s most active volcanoes sent lava and searing gas clouds out the crater and made villagers leave the slopes, a volcanology official said on Tuesday, Feb. 5.

This recent undated picture received 28 July 2006 shows Karangetang volcano spewing smoke in Siau island, on July 28, 2006. Photo/AFP/Getty Images
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