Multi-satellite Observations of Long-lasting Poloidal Pc 4 Pulsations in the Dayside Magnetosphere
Monday, 23 May 2016
Galina Ivanovna Korotova, University of Maryland College Park, College Park, MD, United States, David G Sibeck, NASA/GSFC, Greenbelt, MD, United States and Mark J. Engebretson, Augsburg College, Minneapolis, MN, United States
Abstract:
We use magnetic field and plasma observations from Van Allen Probes and THEMIS spacecraft to study spatial and temporal characteristics of long-lasting poloidal Pc4 pulsations in the dayside magnetosphere. They were observed after the main phase of the strong storm during low geomagnetic activity. The most striking feature of the Pc4 pulsations was their occurrence at similar locations on three of four successive orbits of Van Allen Probes nine hours apart. The pulsations were generated during various interplanetary conditions and the solar wind parameters do not seem control the occurrences of the pulsations. We studied latitudinal nodal structure of the pulsations. We tested possible mechanisms for their generation
