Physics of Auroral Phenomena

Abstract Based on TV and magnetic pulsation data recorded at Barensburg (Spitsbergen) and Lovozero, with using advanced data processing procedures, some fine and new details of high latitude auroral activity were revealed. We found several examples of high-frequency regular auroral pulsations (the period is 4-10 seconds). The pulsations exist for 2-10 minutes, close to the local sunrise, have unusually stable period and in the filtered TV frame look like very weak diffuse luminosity bands. These bands occasionally move from the south to the north, with the speed of 2-10 km/sec. Wavelet analysis of magnetic pulsations revealed a weak magnetic effect of optical pulsations at Barensburg. In Lovozero data fast auroral pulsations have noticeable effect in VLF emissions