chapter 8: section 8.1 what is an earthquake?
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seismic wave
energy that radiates in all directions from the earthquake origin
elastic rebound
hypothesis states that when rocks are deformed, they bend and then break, releasing stored energy
San Andreas Fault
is one of the most studied fault systems in the world
fault
large fracture in earth's crust and mantle
focus
location inside earth where energy is released in an earthquake
what causes most earthquakes?
rapid release of elastic energy stored in rocks that have been subjected to great forces
what is fault creep?
slow, gradual, smooth fault movement
epicenter
spot on the surface of earth directly above focus
earthquake
vibration of earth due to release of pressure
