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Natural environment
Related to any physical feature of the earth's natural environment.
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Natural environment > Earthquake 
risk evaluation, risk reduction, and risk management
Natural environment; Earthquake
All relate to exposure of life and property to earthquake hazards.
rock avalanche
Natural environment; Earthquake
A large mass of rock, sliding or flowing very rapidly under the force of gravity.
rock fall
Natural environment; Earthquake
Large block(s) of rock falling under the force of gravity.
rupture velocity
Natural environment; Earthquake
The speed at which a fault rupture propagates along a fault.
sand boil
Natural environment; Earthquake
Sand and water ejected from the ground as the result of liquefaction at shallow depths in an earthquake.
scarp
Natural environment; Earthquake
A steep slope formed by the displacement of the ground surface by movement of a fault or by other geologic process such as a landslide. See fault scarp.
secondary waves
Natural environment; Earthquake
A type of body wave, slightly slower than a primary wave, that moves rocks vertically or horizontally; they move at 2 miles (3 km) per second.
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)