Speaker
Dr
Georgios Balasis
(National Observatory of Athens)
Description
We have found a specific time interval during the Halloween 2003 magnetic storm, when the Cluster and CHAMP spacecraft were in good local time (LT) conjunction, and have examined the Pc3 (22-100 mHz) and Pc4-5 (1-22 mHz) ULF wave activity using data from Cluster, CHAMP and the CARISMA magnetometer network. We provide evidence for the first simultaneous observation of a Pc3 ULF wave event in the magnetosphere, in the topside ionosphere and on the ground, by Cluster, CHAMP and the Dawson (DAWS) magnetic station respectively at 13:00 LT. Moreover, we show the remarkably clear transition of the wave’s frequency into a higher regime within the Pc3 range, simultaneously detected in the magnetosphere and topside ionosphere and on the Earth’s surface. The commonly observed wave parameters (i.e. onset, duration and frequency content) at Cluster, CHAMP and DAWS provide evidence that we are, indeed, observing manifestation of the same phenomenon.
This work has received support from the European Space Agency under contract ESTEC 4000103770/11/NL/JA/ef and from the European Community’s Seventh Framework Programme under grant agreement no. 284520 for the MAARBLE (Monitoring, Analyzing and Assessing Radiation Belt Energization and Loss) collaborative research project.
Primary author
Dr
Georgios Balasis
(National Observatory of Athens)
Co-authors
Mr
Constantinos Papadimitriou
(National Observatory of Athens)
Dr
Eftyhia Zesta
(NASA)
Prof.
Ian Mann
(University of Alberta)
Prof.
Ioannis A. Daglis
(University of Athens)
Mrs
Marina Georgiou
(National Observatory of Athens)
Dr
Roger Haagmans
(ESA)
