  We have carried out a model calculation of the flux noise produced by vortex
avalanches in a Type-II superconductor, using a simple kinetic model proposed
by Bassler and Paczuski. Over a broad range of frequencies, we find that the
flux noise $S_{\Phi}(\omega)$ has a power-law dependence on frequency,
$S_{\Phi}(\omega) \sim \omega^{-s}$, with $s \sim 1.4$ in reasonable agreement
with experiment. In addition, for small lattices, the calculated
$S_{\Phi}(\omega)$ has a high-frequency knee, which is seen in some
experiments, and which is due to the finite lattice size. Deviations between
calculation and experiment are attributed mostly to uncertainties in the
measured critical current densities and pinning strengths of the experimental
samples.
