Dunning, Brian. The Bell Island Boom, Skeptoid Media, 26 Jan 2010. Ontleend aan de website van Skeptoid, 26 juli 2010. Citaat (onderstreping toegevoegd): "They also picked up large lightning flashes, and it was in part from the Vela satellites that we learned about lightning superbolts. About five of every ten million bolts of lightning is classified as a superbolt, which is just what it sounds like: An unusually large bolt of lightning, lasting an unusually long time: About a thousandth of a second. Superbolts are almost always in the upper atmosphere, and usually over the oceans."
