Lightning is seen amid 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 for 3,500 people as it
sent a cloud of ash that reached Argentina. The National Service of
Geology and Mining said the explosion that sparked the eruption also
produced a column of gas 10 kilometers (six miles) high, hours after
warning of strong seismic activity in the area.
More info here.