Phase 02
Phase 02 : (1) A stage in periodic motion, such as wave motion or the motion of an oscillator, measured with respect to a given initial point and expressed in angular measure. (2) A pulse, wavelet or group of seismic body- or surface-wave energy arriving at a definite time, which passed the Earth on a specific path (see also phase nomenclature). (3) Stages in the physical properties of rocks or minerals under differing conditions of pressure, temperature, and water content