Hi, May be of interest: How the USGS uses Twitter data to track earthquakes https://blog.twitter.com/2015/usgs-twitter-data-earthquake-detection Enjoy the day, Emily *Disclaimer: the use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.* Emily C. Wild Librarian (Physical Scientist) U.S. Geological Survey, Denver Library Denver Federal Center ph: (303) 236-1003 [log in to unmask] USGS Libraries: http://library.usgs.gov Tutorials: http://tinyurl.com/lh3tmua Profile: http://profile.usgs.gov/ecwild