â€¢Trembling or shaking of the ground caused by the sudden release of energy stored in the rocks beneath the surface of the earth
Elastic rebound theory
â€¢Sudden release of progressively energy stored in the rocks
â€¢Rocks progressively strained
â€¢Energy stored in the rock exceeds the breaking strength of the rock
Focus of an earthquake
â€¢The point within the Earth where seismic wave originates
â€¢Point of initial breakage of the rock or movement along fault
â€¢Usually below the Earth's surface
What is the minimum number of seismic stations needed to determine the estimated regional location of the epicenter of an earthquake?
In order to find the exact location of the epicenter of an earthquake, the first motion of what type of sesmic waves can be used?
The distance ofa seismic station from the epicenter of an earthquake can be measured by the time of arrivla differnces of what two types of seismic waves?
â€¢ P & S Waves