The Calbuco volcano is seen erupting from Puerto Varas, Chile, Wednesday, April 22, 2015. (Carlos F. Gutierrez)
Children watch the Calbuco volcano erupt, from Puerto Varas, Chile, Wednesday, April 22, 2015. (Carlos F. Gutierrez)
The Calbuco volcano erupts near Puerto Varas, Chile, Wednesday, April 22, 2015. (Diego Main/Aton Chile)
The Calbuco volcano erupts near Puerto Varas, Chile, Thursday, April 23, 2015. (David Cortes Serey/ Agencia Uno)
SANTIAGO, Chile -- The Calbuco volcano erupted Wednesday for the first time in more than 42 years, billowing a huge ash cloud over a sparsely populated, mountainous area in southern Chile. See photos above.