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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 
fault barrier
Earth science; Seismology
An area of fault surface that is resistant to slip because of geometrical or structural changes.
fault-angle depression
Earth science; Seismology
An arrow, downdropped crustal block bounced by a fault on only one side.
deterministic hazard assessment
Earth science; Seismology
An assessment that specifies single-valued parameters such as maximum earthquake magnitude or peak ground acceleration, without consideration of likelihood.
microearthquake
Earth science; Seismology
A term used to describe earthquakes under Richter magnitude 2, and occasionally, slightly larger quakes, especially those not felt by people nearby.
moderate earthquake
Earth science; Seismology
An earthquake having a magnitude of 5 to 6 on the Richter scale.
major earthquake
Earth science; Seismology
An earthquake having a magnitude of 7 to 7. 99 on the Richter scale.
great earthquake
Earth science; Seismology
An earthquake having a magnitude of 8 or greater on the Richter scale.
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)