Dynamic Moods

The official title of this clip is "Pulse of the Nation: U.S. Mood Throughout the Day inferred from Twitter." Basically it represents the mood of the USA over one day, as represented by keywords found in tweets. The size of a state is based on the number of tweets at that time, so California at 3:00 a.m. is much smaller than California at 3:00 p.m. And the colors represent the mood: green for happy, red for unhappy, and different shades between. H/t DarkSyde @ DailyKos.