In case you missed it, Chaiten Volcano in southern Chile erupted couple of days ago, forcing app. 4,500 people to evacuate from their homes. This volcano supposedly has not erupted in at least 2,000 years.
sattelite image:
view from the ground:
I've seen recordings of lightning storms from the clouds of volcano ash, but this one is just incredible. I've never seen anything like it, or thought it possible:
Here's a link to a bigger jpg of the first image of lightning storm:
http://galacticcentral.org/imagebucket/volcano.jpg