Comparative study of two-dimensional maximum likelihood and interpolated root-MUSIC with application to teleseismic source localization

We apply the 2D broadband maximum likelihood (ML) and interpolated root-MUSIC methods to estimate the azimuth and velocity parameters of teleseismic events recorded by the GERESS array. A sequential test based on likelihood ratios (LR) is developed for signal detection. Our experimental results show that both methods can provide reliable estimates of signal parameters. However, ML is shown to have better estimation accuracy and robustness than interpolated root-MUSIC at the expense of a higher computational cost