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Natural environment
Related to any physical feature of the earth's natural environment.
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Natural environment > Earthquake 
mantle (of the earth)
Natural environment; Earthquake
That part of the earth between the crust and the core.
seismology
Natural environment; Earthquake
The study of earthquakes, earthquake sources, and the propagation of seismic waves.
seismometer
Natural environment; Earthquake
The sensor that detects the seismic wave energy and transform it into an electric voltage.
seismotectonic zone or province
Natural environment; Earthquake
A geographic area characterized by similar geology and earthquake characteristics.
shear modulus
Natural environment; Earthquake
The ratio of shear stress to shear strain of a material during simple shear.
shear waves
Natural environment; Earthquake
Waves that radiate out from an earthquake’s epicenter rocking from side to side at a fast pace.
shock waves
Natural environment; Earthquake
The waves of energy that are produced underground as rocks snap; when they reach the surface they cause violent shaking.
Sub-categories
- Air (43)
- Atmosphere (59)
- Climate (1147)
- Climate change (10457)
- Coral reefs (23903)
- Deserts (738)
- Earthquake (7143)
- Flood (34)
- Forests (37)
- Grassland (35)
- Land mass (144)
- Landslide (66)
- Mountains (203)
- Plateau (39)
- Speleology (1857)
- Volcano (5852)
- Water (18527)