Deep earthquakes occur in areas where oceanic crust is being actively subducted. Earthquake Waves Earthquakes are a form of wave energy that is transferred through bedrock. The point on the Earth's surface directly above the focus is termed the epicenter . Movement of body waves away from the focus of the earthquake. The epicenter is the location on the surface directly above the earthquake's focus.
Body waves are seismic waves that travel through the lithosphere.
Both of these waves produce a sharp jolt or shaking. They travel at a speed of about 5 to 7 kilometers per second through the lithosphere and about 8 kilometers per second in the asthenosphere . The speed of sound is about 0.30 kilometers per second. P-waves also have the ability to travel through solid, liquid, and gaseous materials. When some P-waves move from the ground to the lower atmosphere, the sound wave that is produced can sometimes be heard by humans and animals.