ISSN:
0992-7689
Keywords:
Magnetospheric physics (MHD waves and instabilities)
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract A 16 mHz Pc4 pulsation was recorded on March 17, 1998, in the prenoon sector of the Earth’s magnetosphere by the Equator-S satellite. The event is strongly localized in radial direction at approximately L = 5 and exhibits properties of a field line resonance such as an ellipticity change as seen by applying the method of the analytical signal to the magnetic field data. The azimuthal wave number was estimated as m ≈ 150. We discuss whether this event can be explained by the FLR mechanism and find out that the change in ellipticity is more a general feature of a localized Alfvén wave than indicative of a resonant process.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s00585-000-0411-5
Permalink