Plate Tectonics

• USGS: This Dynamic Earth

Natural Disasters in General

• Yahoo Disasters Page
• Federal Emergency Management Agency
• Natural Hazards Center at the University of Colorado
• USGS Hazards Page

Earthquakes

• USGS Earthquake Information
• FEMA Earthquake Pages
• New Madrid Seismic Zone Information Pages
• Univ. Nevada Reno- About Earthquakes Page
• Earthquake Engineering Research Institute

Volcanic Eruptions

• MTU Volcanoes Page
• The Electronic Volcano
• Volcano World
• Cascades Volcano Observatory

Tsunami

• Univ. Washington Tsunami Information
• Real Insurance Ultimate List of Tsunami Resources

Landslides

• USGS National Landslide Information Center
• Landslide videos on the internet
  
  

Floods

• PBS - NOVA Flood Page
• Dartmouth Flood Observatory
• Floodplain Management Web Site

Weather Related Disasters

• National Hurricane Center
• Times Picayune Series on Hurricanes - "Washing Away" 
• USA Today Tornado Page

 Meteorite Impacts

• Asteroid and Comet Impact Hazards
• The Chesapeake Bay Bolide
• Terrestrial Impact Structures
  
• Purdue University Impact Calculator