Cascades Volcano Observatory
A great place top start your explorations about volcanoes; has lots of information freely available

USGS Volcano Hazards Program
United States Geological Survey page dedicated to reducing the risk from hazardous volcanoes in the USA

Earthquake Factsheet
A site that contains information about the best ways to prepare for and respond to an earthquake

Susan Rosenberg's Quaking Home Page
An earthquake-watcher has compiled a list of links to find out more about earthquakes

USGS National Earthquake Information Center
General information about earthquakes, mostly in the USA, with links to other earthquake sites

World-Wide Earthquake Locator: Global Earthquake Report
This site has a current listing of earthquakes worldwide within the last two or three days