The relationship between the spatial and temporal properties of auroral power and low-latitude magnetic Pi2 pulsations is statistically studied using auroral images obtained with the Ultraviolet Imager on the Polar spacecraft and magnetic fields measured at the Kakioka Observatory (L = 1.3). We select auroral intensification events from spatially integrated auroral power at time steps of ~180 s and for each event determine various properties of associated Pi2 pulsations in a 300-s time window. Since our auroral events are simply defined to be a power increase of 30% or greater, some events are well-defined substorm expansion phase onsets reaching 50 GW, but some are weak events reaching only ~1 GW. Nevertheless, the Pi2 pulsations show very similar local time patterns of amplitude and polarization regardless of the magnitude of the increase in auroral power. This implies that a single mechanism excites Pi2-band oscillations over a wide range of auroral activity. A likely source of the low-latitude pulsations is a plasmaspheric cavity mode, and our local time patterns of Pi2 parameters show features consistent with theoretical models of the cavity mode excited by longitudinally localized disturbances.