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A feature in the gravity field of the earth caused by the distribution of mass in the earth.
Industry:Natural environment
The anticipated ground acceleration at a site used for earthquake-resistance design of a structure.
Industry:Natural environment
General terms referring to the quantitative or qualitative motion of the earth's surface produced by earthquakes or explosions.
Industry:Natural environment
The largest earthquake that has a high enough probability of occurring at a site that it is appropriate to design a structure to withstand it.
Industry:Natural environment
The velocity with which most of the energy in a wave train travels.
Industry:Natural environment
The increase in volume of rock due to a change in strain.
Industry:Natural environment
A unit of frequency, equal to the number of cycles per second. See frequency.
Industry:Natural environment
The angle of a fault or other planar geologic feature relative to horizontal.
Industry:Natural environment
A fault with the major component of relative displacement along the direction of dip of the fault.
Industry:Natural environment
