Tungurahua volcano ejects incandescent rocks in Banos, 178 km south of Quito, capital of Ecuador, on Aug. 21, 2012. The government authorities declared an orange alert due to increasing volcanic activities and urged citizens living around the volcano surroundings to evacuate. (Xinhua/Santiago Armas)

Tungurahua volcano ejects incandescent rocks in Banos, 178 km south of Quito, capital of Ecuador, on Aug. 21, 2012. The government authorities declared an orange alert due to increasing volcanic activities and urged citizens living around the volcano surroundings to evacuate. (Xinhua/Santiago Armas)

Tungurahua volcano ejects incandescent rocks in Banos, 178 km south of Quito, capital of Ecuador, on Aug. 21, 2012. The government authorities declared an orange alert due to increasing volcanic activities and urged citizens living around the volcano surroundings to evacuate. (Xinhua/Santiago Armas)