The article neither says, nor offers any reason to believe, that Twitter can predict any of those things. (Predicting earthquakes is a very difficult problem a

The article neither says, nor offers any reason to believe, that Twitter can predict any of those things. (Predicting earthquakes is a very difficult problem and any system that could do it well enough would be tremendously valuable. What Twitter can do is to detect earthquakes after they happen, by watching for people tweeting about them. That's got some value too, but it's not remotely at the same level of impressiveness and importance that an earthquake predictor would have.)