earthquake

The violent shaking of the ground produced by deep seismic waves, beneath the epicentre, generated by a sudden decrease or release in a volume of rock of elastic strain accumulated over a long time in regions of seismic activity (tectonic earthquake). The magnitude of an earthquake is represented by the Richter scale; the intensity by the Mercalli scale. (Source: GUNN)



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Reeves CV 1972. Earthquakes in Ngamiland. Botswana Notes and Records 4 257-261
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Schreiber U Earthquakes.
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Earthquakes.pdf 739.49 KB