Post updated 5:00 pm, Monday, June 20, 2011.
LightBox will continue to update this post throughout the day as images arrive.
After laying dormant for nearly half a century, the Puyehue volcano in southern Chile erupted on Saturday, shooting a column of ash and gas six miles into the sky and prompting the evacuation of more than 3,500 residents. There were no reports of injuries following the eruption, although a border crossing between Argentina and Chile was shut down. Residents over 60 miles away were encouraged to wear protective masks as volcanic ash coated towns in Chile and Argentina. Here's some of the best images photographers captured in the past 24 hours.