Video, from Eric Fischer:
Green dots are tweets about earthquakes. Gray dots are tweets about other topics. Each frame is one second (total of 12 minutes). Thanks to Natural Earth for the land, water, and boundary shape data and the Twitter Streaming API for the tweets.
![](http://pixel.quantserve.com/pixel/p-8bUhLiluj0fAw.gif?labels=pub.28925.rss.TechCons.7604,cat.TechCons.rss)