Analysis of hysteresis effect in p-mode frequency shifts and solar activity indices

Using intermediate degree p-mode frequency data sets for solar cycle 22, we find that the frequency shifts and magnetic indices show a 'hysteresis' ph enomenon. It is observed that the magnetic indices follow different paths f or the ascending and descending phases of the solar cycle, as the descendin g path always seems to follow a higher track than the ascending one. Howeve r, for the radiative indices, the paths cross each other indicating phase r eversal.