Comment on 'The use of velocity spectrum for stacking receiver functions and imaging upper mantle discontinuities' by H. Gurrola, J. B. Minster and T. Owens

In a recent paper, Gurrola, Minster & Owens (1994; hereafter referred to as GMO) introduced a technique for the analysis of seismic data and applied it to the records of station OBN in Russia. GMO claimed that this was a new technique in earthquake seismology, and that their results for OBN provided a new insight into the deep structure of the Russian platform. We have some comments on their techniques and results.     

Comment on 'Numerical calculation of modes of oscillation of the Earth's core' by D. E. Smylie, X. Jiang, B. J. Brennan and K. Sato

In a recent paper, Smylie et al . (1992) have referred to the issue of transport terms in the boundary conditions when applying the subseismic equation (SSA) in core dynamics. Here we wish to set the record straight concerning the erroneous interpretation of, and confusing references to, our own work on the subject.