Statistical patterns in X-ray and UV auroral emissions and energetic electron precipitation

Statistical auroral images from the UV and X-ray imagers on the Polar space craft were compared with each other and with statistical distributions of e nergetic auroral electron energy fluxes from two different energy ranges: 5 0 eV to 20 keV and 30 keV to 2 MeV. The individual statistical auroral oval s each had unique features absent in some or all of the other ovals; howeve r, the differences were consistent with the known instrument energy respons es, the motion of magnetospheric particles in the inner magnetosphere, and the spectral characteristics of the auroral particles. Separation of the st atistical results by Kp showed little difference in the auroral distributio ns other than in intensity. However, separation of the X-ray data by Dst sh owed significant differences, and there were indications that the UV statis tical data show a similar dependence. X-ray emissions, on average, were mol e intense in the evening sector for Dst > 0, associated with isolated subs torm activity and substorm injections, and in the morning sector for Dst < 0, associated with geomagnetic storm activity and strong magnetospheric con vection.