Casual Friday — how big are “massive” solar flares?

The press love to use the word “massive” when talking about solar flares. They do this partly, I suppose, because they’re trying to get people’s attention. But I suspect they’re also just running to the end of what language alone can describe. So how big is a solar flare? Watch this video by Scott Stevenson (direct link, if his speech is too fast for you to follow, turn on the transcript via the CC button):

H/T: Boing Boing

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