1. A process for identifying and tracking a target, comprising: detecting emissions emitted by the target; processing emissions data detected using a series of statistical manipulation, the series of statistical manipulations comprising: filtering the seismic data detected; extracting statistical frequency information; constructing a statistical mixture model describing the emission characteristics of the target observed in a range of different environments; and constructing a dynamic mixture model construction based on existing known data and identification of an unknown target by convergence of the model to a state characteristic of the target; and identifying and tracking the target in which the emissions detected are detected passively by at least one sensor.