Characteristics of MHD waves associated with storm sudden commencements observed by Sabre and ground magnetometers

Details Characteristics of MHD waves associated with storm sudden commencements observed by Sabre and ground magnetometers Characteristics of MHD waves associated with storm sudden commencements observed by Sabre and ground magnetometers

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38..603y&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 38, May 1990, p. 603-616.

Computer Science

13

Geomagnetic Pulsations, Magnetohydrodynamic Waves, Magnetometers, Sudden Storm Commencements, Backscattering, Extremely Low Radio Frequencies

Scientific paper

ULF pulsations occurring immediately after storm sudden commencements (SSCs) are caused by an impulse to the magnetosphere and might be expected to have a considerable compressional mode wave component. The backscatter intensity modulations are thought to be a consequence of both a greater radar sensitivity to fluctuations in backscatter intensity than velocity changes and also enhanced electron precipitation associated with the pulsations. These results are indicative of a compressional mode wave, which is expected to have a small ionospheric electric field and represent the first direct, ground based observational evidence of such modes away from their point of coupling to field line resonances. A maximum entropy spectral analysis indicates that the magnetometer pulsation may be dominated by the same frequency as the radar or by a higher harmonic. The dominant frequency in the magnetometer pulsation is dependent on the pulsation azimuthal wave number, with higher harmonic observations correlating with higher m-values. This behavior is consistent with recent models of global modes.

Affiliated with

Also associated with

No associations

Rating

Characteristics of MHD waves associated with storm sudden commencements observed by Sabre and ground magnetometers 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 Characteristics of MHD waves associated with storm sudden commencements observed by Sabre and ground magnetometers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Characteristics of MHD waves associated with storm sudden commencements observed by Sabre and ground magnetometers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-783494