Year in Volcanic Activity
A cloud of ash billowing from Puyehue volcano near Osorno in southern Chile, 870 km south of Santiago, on June 5, 2011. Puyehue volcano erupted for the first time in half a century on June 4, 2011, prompting evacuations as it sent up a cloud of ash that circled the globe. (Claudio Santana/AFP/Getty Images)
