  A parametric study of the magnetic dipole behavior in resistive
incompressible MHD inside a rotating sphere is performed, using direct
numerical simulations and considering Reynolds and Ekman numbers as controlling
parameters. The tendency is to obtain geodynamo-like magnetic dipole reversal
regimes for sufficiently small Ekman and large Reynolds numbers. The typical
dipole latitude obtained in the reversal regime is around 40 degrees (with
respect to the rotation axis of the sphere). A statistical analysis of waiting
times between dipole reversals is also performed, obtaining a non-Poissonian
distribution of waiting times, indicating long-term memory effects. We also
report the presence of a $1/f$ frequency power spectrum in the magnetic dipole
time-series, which also shows a tendency to grow toward lower frequencies as
the Ekman number is decreased.
