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Earthquake Fault = earthquake faults are fractures where displacement is on either side relative to one another and parallel to the fracture Epicentre = the point on the Earth's surface vertically above the focus of an earthquake, ie directly above the true centre of the seismic disturbance from which the shock waves of an earthquake seem toIn an earthquake, huge masses of rock move beneath the Earth 's surface and cause the ground to shake Earthquakes occur constantly around the world Often they are too small for people to feel at all Sometimes, however, earthquakes cause great losses of life and propertyMaximum credible earthquake means the most severe earthquake that can be expected at a site based on geologic and seismological evidence, including a review of all historic earthquake data of events sufficiently nearby to influence the site, all faults in the area, and attenuations from causative faults to the site(9)(16) "Mineral" means any ore, rock, or substance,