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Natural environment
Related to any physical feature of the earth's natural environment.
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Natural environment > Earthquake 
amplitude (wave)
Natural environment; Earthquake
Maximum deviation from normal of any wave-like disturbance.
asthenosphere
Natural environment; Earthquake
The soft and probably partly molten layer of the earth below the lithosphere. Distinguished by low seismic-wave velocities and high seismic wave attenuation .
attenuation
Natural environment; Earthquake
The decrease in seismic signal amplitude caused by spreading of the wave and absorption and scattering of seismic energy by the materials of the earth as a wave propagates from a ...
b value
Natural environment; Earthquake
A measure of the relative frequency of the occurrence of earthquakes of different sizes.
basement
Natural environment; Earthquake
Igneous and metamorphic rocks underlying the sedimentary rocks of a region and extending to the base of the crust.
first motion
Natural environment; Earthquake
The direction of ground motion as the P-wave arrives at a seismometer. Used to compute fault-plane solutions.
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)