Solar-cycle variation of the sound-speed asphericity from GONG and MDI data 1995-2000

We study the variation of the frequency splitting coefficients describing t he solar asphericity in both GONG and Ml data, and use these data to invest igate temporal sound-speed variations as a function of both depth and latit ude during the period 1995-2000 and a little beyond. The temporal variation s in even splitting coefficients are found to be correlated to the correspo nding component of magnetic flux at the solar surface. We confirm that the sound-speed variations associated with the surface magnetic field are super ficial. Temporally averaged results show a significant excess in sound spee d around r = 0.92 R-circle dot and latitude of 60 degrees.