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You should watch this. But you need to watch it all the way to the end. It’s only a minute long.
Animation of equakes in Okla. & parts of adjoining states, 2004-16. Size of dots and volumes are proportional to equake strengths. #okquake pic.twitter.com/5qmgZKqKs5
— USGS in Oklahoma (@USGS_Oklahoma) July 20, 2017
