13. The computer program product of claim 7 , wherein the comparing at least a portion of the query content to the content of the aggregated messages comprises: generating a list of common locations correlated to the query content; and ranking the list of common locations based on a probability score that message text of a common location matches the query content text.
7. A computer program product stored on a non-transitory computer-readable medium that when executed by a processor, performs a method for locating a user based on tweets associated with a location, the method comprising: aggregating a plurality of messages, each message comprising content and a geotag identifying a location from which the message was sent; grouping messages according to the locations from which the messages were sent; receiving query content from a user at an unknown location; estimating the unknown location by comparing at least a portion of the query content to the content of the aggregated messages; and outputting the estimated location.