You can also check out the GPU database I've been working on at http://worldmap.harvard.edu/tweetmap http://worldmap.harvard.edu/tweetmap. Its VERY beta but if

You can also check out the GPU database I've been working on at http://worldmap.harvard.edu/tweetmap http://worldmap.harvard.edu/tweetmap. Its VERY beta but if you move the start date back to early December and the end of Decemberand you'll see a spike, particularly in the south. Sample size is ~ 175 million tweets.