US Geological Survey
Usgs: Volcanic Hazards, Features, and Phenomena
Site from the U.S. Geological Survey provides a brief list of volcano terminology including descriptions as well as links to major menus.
Ready
Ready: Tsunamis
This site provides information about what happens before, during, and after a tsunami. Content includes background information, a fact sheet, and information about the Hazard Mitigation Grant Program (HMGP).