A long-duration narrowband Pc5 pulsation

Details A long-duration narrowband Pc5 pulsation A long-duration narrowband Pc5 pulsation

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jgra..11401213s&link_type=abstract

Journal of Geophysical Research, Volume 114, Issue A1, CiteID A01213

Physics

1

Magnetospheric Physics: Magnetosphere: Inner, Magnetospheric Physics: Mhd Waves And Instabilities (2149, 6050, 7836), Magnetospheric Physics: Plasma Waves And Instabilities (2471), Magnetospheric Physics: Magnetosphere/Ionosphere Interactions (2431), Magnetospheric Physics: Magnetospheric Configuration And Dynamics

Scientific paper

We report on a rare event of a narrowband ULF magnetospheric pulsation that is observed at geosynchronous orbit over five consecutive days in the recovery period of a magnetospheric storm, with frequencies ranging from 5 to 9 mHz. The pulsation displays distinctive localization, being observed over several hours of local time in the noon and postnoon sectors during successive passes of GOES-8 and GOES-9. Geotail, which is traversing the outer magnetosphere a couple of RE farther out from geosynchronous orbit at the time the pulsations are observed, shows no distinct narrowband fluctuation in the magnetic field, excluding oscillations in the solar wind as a possible source of the pulsations. On the ground, several of the IMAGE magnetometers observe pulsations with similar spectral characteristics. By performing a phase cross-spectrogram analysis on measurements from adjacent and latitudinally aligned ground stations we estimate the azimuthal mode number m of the pulsation, which we find to range between 20 and 55. Phase difference calculations indicate an eastward phase propagation of these pulsations. Density measurements from LANL spacecraft at geosynchronous orbit show evidence of a plasmasphere refilling process that is slower than usual, possibly associated with the observed slow frequency decrease and the unusually long lasting of the pulsations.

Affiliated with

Also associated with

No associations

Rating

A long-duration narrowband Pc5 pulsation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A long-duration narrowband Pc5 pulsation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A long-duration narrowband Pc5 pulsation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1810027