Fig. 1From: Monitoring hydraulic stimulation using telluric soundinga Example eigananalysis Mohr diagram adapted from Lilley (2015). Points H and J mark the eigenanalysis positions, and the eigenvalues are the \(D^{\prime }_{xx}\) values of points H and J. b Example Mohr diagram for singular value decomposition adapted from Lilley (2015). OG and OF represent the greater and lesser singular valuesBack to article page