University of Michigan researchers can access a compilation of tweets known as the “Twitter Decahose”, a 10% sample of all tweets, without charge. MIDAS, CSCAR and ARC together manage and support the use of this data repository, including the historical archive of Decahose tweets and ongoing collection. Learn about requesting access from MIDAS. This user guide describes how to access and use the Twitter Decahose using PySpark. Check out this query tool for Twitter Decahose data availability at the University of Michigan.