Yom-Tov and Diaz (2011) report that Twitter can broadcast news faster than traditional media, which provides an opportunity for event detection in Twitter.
there are challenges in event detection from Twitter data: 1) tweets are too short and sometimes cannot carry enough information; 2) tweets contain many noisy words, which can be harmful for event detection and 3) the volume of Twitter data is very large, which makes event detection a big data problem.