The document describes the information cycle, using the example of Hurricane Katrina. It explains how information about an event is created and distributed over time through different sources. In the immediate aftermath, information appears on blogs, news sites, TV, and newspapers. Within weeks, popular magazines begin covering the event. After months, trade publications and scholarly journals start publishing research and analysis. Books documenting the full story may take years to be written and published. The information cycle model shows how researchers can trace an event by searching through sources that appear at different stages over time.