The Long-Lasting QP Emissions Observed On Arase Satellite And Lovozero Station

In this work the simultaneous QP emission registered during about 90 minutes on Arase satellite and Lovozero station (Kola Peninsula) of Polar Geophysical Institute are investigated when the Arase satellite and Lovozero station was geomagnetically conjugate. The QP emission was observed on the nightside during low geomagnetic activity, its frequency on the ground and in space was about 20 mHz. It is found that QP emissions are not accompanied by the geomagnetic pulsations with the same period on the ground-based magnetometers. But it is registered the Pc3 geomagnetic pulsations on Arase satellite. The frequency of these pulsations is about twice larger than frequency of QP emissions. When QP envelope and ULF periodicities are different, it can correspond to different harmonics of a same fundamental oscillation of the field line. The small-scale Pc3 pulsations do not seen on the ground due to its damping in the ionosphere. So investigated QP emissions can be attributed neither to QP1 class no QP2 class.