Related Terms: Epicenter, Hypocenter, Microseism, Heading, Richter magnitude scale, Geodetic, Direction, Pointing, Wind direction, Seismic moment, Nadir, Control points, Geoid, Richter scale, Counterclockwise, Geophone, Level surface, Seismometer, Translation, Strike-slip fault, Nappe, Turn, Geodetic survey, Convergent, Direct, Geodesy, Asthenosphere, Isostasy, Stationary point, Divergent, Ellipsoid, Plate tectonics, Earthquake, Displacement, Divergence, Zenith, Surface waves, Seismogram, Pob, Isotropic, Convergent boundary, Spheroid, Nephoscope, Tectonic, Lagrange points, Sphere, Bearing, Fixed point, Ground zero