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Earth science
Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.
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Earth science > Seismology 
asperity
Earth science; Seismology
A region on a fault of high strength produced by one or more of the following conditions: increased normal stress, high friction, low pore pressure, or geometric changes in the ...
halfspace
Earth science; Seismology
A mathematical model bounded by a planar surface but otherwise infinite. Properties within the model are commonly assumed to be homogeneous and isotropic, unlike the Earth ...
fault length
Earth science; Seismology
(1) the total length of a fault or fault zone. (2) the rupture length along a fault or fault zone associated with a specific earthquake, representing either the observed surface ...
magnetic polarity reversal
Earth science; Seismology
A change of the Earth's magnetic field to the opposite polarity that has occurred at irregular intervals during geologic time. Polarity reversals can be preserved in sequences of ...
double couple
Earth science; Seismology
A model to describe the equivalent body forces for a dislocation source. This model is used to balance the moment of the force system so that no net moment is added to the medium ...
left-lateral fault
Earth science; Seismology
A strike-slip fault on which the displacement of the far block is to the left when viewed from either side.
locked fault
Earth science; Seismology
A fault that is not slipping because frictional resistance on the fault is greater than the shear stress across the fault. Such faults may store strain for extended periods that ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)