Chapter 21 - Building Earth's Surface
Online Resources
USGS Earthquake Hazards Program - This site from the Earthquake Information Center has a great deal of information on worldwide earthquake activity, earthquake science, and earthquake hazard reduction
Live volcano Webcams around the world
Here's a list of Volcano Webcams maintained by the United States Geological Survey
Click here to see live images of Popocatepetl, one of the world's most active volcanoes, located in central Mexico. It's what's known as an andesitic volcano, which means it's forming where two tectonic plates rub up against each other, grinding down the material with enough friction and heat to melt rock and create magma.
USGS information on What Drives Plate Tectonics
Example of movement of continents and how they fit together - Gondwana Animation
A U.S. Geological Survey publication on hot spots
Earthquakes, P waves, and S waves includes animation of seismic waves
A global crustal model showing crustal thickness around the world
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This page was last updated on: February 12, 2006