  The neutral current effects of the future high statistics atmospheric
neutrino data can be used to distinguish the mechanisms between a $\nu_\mu$
oscillation to a tau neutrino or to a sterile neutrino. However, if neutrinos
possess large diagonal and/or transition magnetic moments, the neutrino
magnetic moments can contribute to the neutral current effects which can be
studied by the single $\pi^0$ production events in the Super-K data. This
effect should be included in the future analyses of atmospheric data in the
determination of $\nu_\mu$ to tau or sterile neutrino oscillation.
