1. A method of processing three component single-sensor seismic data, comprising: a) determining a covariance data matrix from the three orthogonal components of the seismic data for each of a plurality of time periods to obtain eigenvectors and eigenvalues; b) calculating, using a processing unit, from the eigenvectors and eigenvalues, seismic attributes for each of the plurality of time periods comprising: i) dip, ii) azimuth, iii) strength and iv) rectilinearity; c) determining a stability measure from the seismic attributes for each of the plurality of time periods; and d) storing the stability measure in a form for display.