Earthquakes (and other earth movements) produce different types of [[seismic wave]]s. These waves travel through the earth (soil and rock), and provide an effective way to "image" or "see" events and structures in the Earth's subsurface. | Earthquakes (and other earth movements) produce different types of [[seismic wave]]s. These waves travel through the earth (soil and rock), and provide an effective way to "image" or "see" events and structures in the Earth's subsurface. |