RT @USGS_Oklahoma: Animation of equakes in Okla. & parts of adjoining states, 2004-16. Size of dots and volumes are proportional to eq… https://t.co/3oEDF7Rm3d

Animation of equakes in Okla. & parts of adjoining states, 2004-16. Size of dots and volumes are proportional to equake strengths. #okquake http://pic.twitter.com/5qmgZKqKs5

— USGS in Oklahoma (@USGS_Oklahoma) July 20, 2017

from Twitter https://twitter.com/DouglasHAllen