The overall objectives of the United States Geological Survey (USGS) Volcano Hazards Program are to advance the scientific understanding of volcanic processes and to lessen the harmful impacts of volcanic activity. The program monitors active and potentially active volcanoes, assesses their hazards, responds to volcanic crises, and conducts research on how volcanoes work to fulfill a Congressional mandate (P.L. 93-288) that the USGS issue “timely warnings” of potential volcanic hazards to responsible emergency-management authorities and to the populace affected. In addition to obtaining the best possible scientific information, the program works to effectively communicate its scientific findings to authorities and the public in an appropriate and understandable form.
Check out the work of the Volcano Hazards Program at their website.