Earthquake:
A series of vibrations induced in the earth's crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating.
A series of vibrations induced in the earth's crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating.
Fault:
A defect or imperfection.
A defect or imperfection.
Elastic Rebound:
Geology a theory of earthquakes that envisages gradual deformation of the fault zone without fault slippage until friction is overcome.
Geology a theory of earthquakes that envisages gradual deformation of the fault zone without fault slippage until friction is overcome.
Focus:
A point at which rays of light, heat, or other radiation, meet after being refracted or reflected.
A point at which rays of light, heat, or other radiation, meet after being refracted or reflected.
Epicenter:
A point, directly above the true center of disturbance.
A point, directly above the true center of disturbance.
Shadow Zone:
The area of the earth from angular distances of 104 to 140 degrees from a given earthquake.
The area of the earth from angular distances of 104 to 140 degrees from a given earthquake.
Fault Zone:
A network of interconnected fractures representing the surficial expression of a fault.
A network of interconnected fractures representing the surficial expression of a fault.
Seismology
The scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies.
The scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies.
Seismograph
Instruments that measure motions of the ground, including those of seismic waves generated by earthquakes, volcanic eruptions, and other seismic sources.
Instruments that measure motions of the ground, including those of seismic waves generated by earthquakes, volcanic eruptions, and other seismic sources.
Magnitude
The size of a mathematical object, a property by which the object can be compared as larger or smaller than other objects.
The size of a mathematical object, a property by which the object can be compared as larger or smaller than other objects.
Intensity
The power transferred per unit area. In the SI system, it has units watts per meter squared.
The power transferred per unit area. In the SI system, it has units watts per meter squared.
Tsunami
A series of water waves caused by the displacement of a large volume of a body of water, generally an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions.
A series of water waves caused by the displacement of a large volume of a body of water, generally an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions.
Seismic Gap
A segment of an active fault known to produce significant earthquakes.
A segment of an active fault known to produce significant earthquakes.