Dense plumes rise from the summit crater of Mount Ontake as the volcanic mountain erupts in central Japan on Saturday. With a sound that many likened to thunder, the 10,062-foot mountain spewed large white plumes high into the sky, sending people fleeing, and covering surrounding areas in ash. As more than 250 people were stuck on the slopes for hours, many took refuge in mountain lodges. At least 40 are injured and seven hikers are reported missing.