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Natural environment
Related to any physical feature of the earth's natural environment.
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Natural environment > Earthquake 
hypocenter
Natural environment; Earthquake
The point within the earth where earthquake rupture begins; the focus of an earthquake.
duration (earthquake)
Natural environment; Earthquake
The length of time the ground motion at a site shows certain characteristics in an earthquake.
earthquake
Natural environment; Earthquake
A trembling and shaking of the earth’s surface; a vibration or trembling of the ground caused by movement of the subsurface.
intensity (earthquake)
Natural environment; Earthquake
A subjective numerical index describing the severity of ground shaking in an earthquake in terms of the effect on objects and humans. A version of the Modified Mercalli intensity ...
earthquake hazard
Natural environment; Earthquake
Any physical phenomenon associated with an earthquake that may produce adverse effects on human activities.
interplate earthquake
Natural environment; Earthquake
An earthquake that occurs on the boundary between two tectonic plates.
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)