 |
| Titel |
Magnetopause surface oscillation frequencies at different solar wind conditions |
| VerfasserIn |
F. Plaschke, K.-H. Glassmeier, D. G. Sibeck, H. U. Auster, O. D. Constantinescu, V. Angelopoulos, W. Magnes |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 12 ; Nr. 27, no. 12 (2009-12-11), S.4521-4532 |
| Datensatznummer |
250016728
|
| Publikation (Nr.) |
 copernicus.org/angeo-27-4521-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| Statistical analyses of the magnetopause (MP) motion observed by THEMIS
suggested that the MP oscillates preferably at some prominent (sometimes
called "magic") frequencies, which were found to stand out also in
ground-based and ionospheric measurements of geomagnetic ultra-low frequency
pulsations. In this paper we present an extension to these statistical
analyses of the observed MP oscillations examining their dependence on the
prevalent interplanetary magnetic field (IMF), solar wind (SW) flow speed and
cone angle conditions as well as their local time of occurrence. Our results
show enhanced oscillation activity at these frequencies in the noon local
time sector during periods of northward IMF, slow or moderate SW speed and
low SW cone angle. This combination of conditions supports an interpretation
in terms of standing Alfvénic Kruskal-Schwarzschild surface modes on the
MP. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|