Earthquakes - sudden release of energy in the Earth's crust that creates seismic waves.
Fault - planar fracture or discontinuity in a volume of rock.
Elastic Rebound - Elastic rebound is an explanation for how energy is spread during earthquakes.
Focus - point where light rays originating from a point on the object converge.
Epicenter - Earth's surface that is directly above the hypocenter or focus.
Shadow zones - is the area of the earth from angular distances of 104 - 140 degrees from a given earthquake.
Fault zones - Consist of a single clean fracture.....
Seismology - Seismology is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet--like bodies.
Tsunami - tsunami is a series of water waves caused by the displacement of a large volume of a body of water, generally an ocean or large sea.
Seismic Gap - A segment of an active fault known to produce significant earthquakes.
Seismograph - is an instrument used to detect and record earthquakes.
Intensity - Intensity is the power transferred per unit area.