For example, the force of gravity is the cause of a body falling freely. A smaller earthquake occurring prior to a larger earthquake originating at or near the larger earthquake's hypocenter. The number of cycles per unit time of a wave or oscillation. Homogeneous is the opposite of heterogeneous. The site within the earth where the rupture of the earthquake originates .
Granite is a typical igneous rock found in continental crust.
Basalt is a common , fine-grained igneous rock found in oceanic crust. The Modified Mercalli Scale is the current scale used to provide a quanitative number for qualitative descriptions of the effects of an earthquake. It is equal to 1000 meters. The angle measured at the center of the earth between the plane of the equator and the plane intersecting a point on the surface of the earth. The point may be either to the north or to the south of the equator.