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Contents of 8.2 How do earthquakes help make images of Earth's interior?

8.2 How do earthquakes help make images of Earth's interior?

• Waves are disruptions that travel through a medium (air, water, etc.) that do not result in net transport of the medium.
• Waves in water are elastic—they do not permanently deform the water medium.
• Other waves are plastic, meaning they do permanently deform the medium.