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  1. No Access

    Article

    Near Earth Current Meander (Necm) Model of Substorms

    We propose that the appropriate instability to trigger a substorm is a tailward meander (in the equatorial plane) of the strong current filament that develops during the growth phase. From this single assumpti...

    W.J. Heikkila, T. Chen, Z.X. Liu, Z.Y. Pu, R.J. Pellinen… in Space Science Reviews (2001)

  2. No Access

    Article

    Auroral precipitation fading before and at substorm onset: ionospheric and geostationary signatures

    Rapid fading of auroral activity a few minutes before substorm breakup has earlier been analyzed in case-studies. Here we report on a study in which all-sky camera (ASC) and magnetic data over 3 years were exa...

    K. Kauristie, T. I. Pulkkinen, A. Huuskonen, R. J. Pellinen… in Annales Geophysicae (1997)

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    Article

    What can we tell about global auroral-electrojet activity from a single meridional magnetometer chain?

    The AE indices are generally used for monitoring the level of magnetic activity in the auroral oval region. In some cases, however, the oval is either so expanded or contracted that the latitudinal coverage of th...

    K. Kauristie, T. I. Pulkkinen, R. J. Pellinen, H. J. Opgenoorth in Annales Geophysicae (1997)

  4. No Access

    Article

    Steady magnetospheric convection: A review of recent results

    Theoretical pressure balance arguments have implied that steady convection is hardly possible in the terrestrial magnetotail and that steady energy input necessarily generates a cyclic loading-unloading sequen...

    V. A. Sergeev, R. J. Pellinen, T. I. Pulkkinen in Space Science Reviews (1996)

  5. No Access

    Chapter

    On the Use of Topside Auroral Images Together with Various Ground-Based Data to Study Local and Global Auroral Development

    Auroral images provided by the DMSP, Dynamics Explorer-1 and Viking satellites have been compared with various types of ground-based recordings. Auroral all-sky camera pictures are limited in their field of vi...

    R. J. Pellinen, O. A. Aulamo, J. D. Craven, L. A. Frank… in Progress in Atmospheric Physics (1988)