Volcanoes and Earthquakes
General
Extreme Science
Franklin Institute: Earthforce
Facts on File: Science Online
Volcanoes
Volcano World (<st1:state w:st="on"><st1:place w:st="on">Oregon Space Grant Consortium)
USGS: Cascades Volcano Observatory
Global Volcanism Program (Smithsonian Institution)
<st1:state w:st="on"><st1:place w:st="on">Michigan Technological University Volcanoes Page
How Volcanoes Work (<st1:place w:st="on"><st1:placename w:st="on">San Diego <st1:placetype w:st="on">State <st1:placetype w:st="on">University)
Earthquakes
USGS: Earthquake Information
Faultline: Seismic Science at the Epicenter
The World-Wide Earthquake Locator
USGS: Earthquakes for Kids