Mt Redoubt puts on a light show
Know what this is? Mount Redoubt in Alaska erupted for the 5th time this century on March 22. Its ash clouds rose 65,000 feet into the sky, disrupting air traffic, and depositing ash on Anchorage, about 110 miles to the northeast. The picture to the left shows lightning in the ash cloud; friction from the ash particles generates a huge static charge in the cloud and when the voltage gets high enough, bang! You can find more great photos here.
