The Calbuco volcano erupts near Puerto Varas, Chile, April 23, 2015. Numerous airlines cancelled flights to and from Pueto Montt, another city near the volcano, due to airborne ash that can ...

The Calbuco volcano is seen erupting from Puerto Varas, Chile, Wednesday, April 22, 2015. The volcano erupted billowing a huge ash cloud over a sparsely populated, mountainous area in southern Chile.

Chile’s Calbuco Volcano erupted again Thursday, marking the third time since last week, the National Service of Geology and Mining said.

Men remove ash from a building's roof, left by the Calbuco volcano, in Ensenada, Chile, Thursday, April 23, 2015. The volcano erupted Wednesday for the first time in more than 42 years, billowing ...

Twin blasts from the Calbuco volcano in southern Chile sent vast clouds of ash into the sky, covering this small town with thick soot and raising concerns Thursday that the dust could contaminate ...

1,500 are evacuated following third Calbuco volcano eruption in Chile, with experts warning of acid rain and deadly mud flows. The total number of evacuees is now estimated at 4,500.

Smoke and ash rise from the Calbuco volcano as seen from the city of Puerto Montt, April 22, 2015. Photo by Rafael Arenas/STR/Reuters A local stands as ash falls from Calbuco volcano in the ...

The Calbuco volcano erupts near Puerto Varas, Chile, in April 2015. Carlos F. Gutierrez/ap Smoke rises from the Turrialba volcano in Turrialba, Costa Rica, in March 2015.

The Calbuco volcano erupts near Puerto Varas, Chile, in April 2015. Carlos F. Gutierrez/ap Smoke rises from the Turrialba volcano in Turrialba, Costa Rica, in March 2015.

Chile’s Calbuco Volcano erupted again Thursday, marking the third time since last week, the National Service of Geology and Mining said.