ИСТИНА

Extended ground-based support of the ARASE satellite in Fennoscandia and Kola Peninsula include several all-sky cameras observed aurora with fine temporal resolution. The data have been analyzed to extract numerical characteristics of complexity of plasma dissipation processes leading to pulsing aurora. Evolution of the correlation dimension calculated by Grassberger- Procacci algorithm was traced during typical events. It was founded that in the beginning of the activation near midnight the correlation dimension is relatively small characterizing the main directed motion of plasma. Then, the complexity of the aurora pattern is increasing that means developing of dissipation in individual less correlated ducts. The work of A.V. Roldugin has been supported by RFBR under grant no. 19-52-50025. The work of S. Oyama and Y. Miyoshi has been supported by JSPS KAKENHI JPJSBP120194814