Tungurahua VolcanoEcuador's Tungurahua volcano (satellite map)—seen here from the town of Cotalo—shot truck-size boulders nearly a mile (1.6 kilometers) away Friday, prompting the evacuation of at least 300 people, according to the Associated Press.Tungurahua—"throat of fire" in the indigenous Quechua language—sits high in the Andes mountains, about 80 miles (130 kilometers) south of Quito, Ecuador's densely populated capital.Eruptions are nothing new for the 16,500-foot (5,000-meter) volcano, which roared back to life in 1999 after nearly 80 years of dormancy. (Related: "'Sleeping' Volcanoes Can wake Up Faster Than Thought.")—Korena Di Roma

Photograph by Dolores Ochoa, AP