Earth Science 8.1 Earthquakes. Earthquakes. Earthquakes. Each year more than 30,000 earthquakes happen worldwide. Most are minor and do very little damage. Only about 100 major earthquakes happen each year on the average.
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Earth Science 8.1 Earthquakes
to particle. Like a bell hit with a hammer, the vibrations ring through the rocks the bedrock that makes up the lithosphere.
When body waves reach the surface, they produce surface waves. Surface waves travel more slowly than body waves do.