| The equatorial latitude of auroral activity during 1972-1977 - :1042 | National Environmental Satellite and Data Information Service (NESDIS)
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
Help
Clear All Simple Search
Advanced Search
The equatorial latitude of auroral activity during 1972-1977
  • Published Date:
    1980
Filetype[PDF-5.19 MB]


This document cannot be previewed automatically as it exceeds 5 MB
Please click the thumbnail image to view the document.
The  equatorial latitude of auroral activity during 1972-1977
Details:
  • Corporate Authors:
    World Data Center A for Solar-Terrestrial Physics
  • Description:
    The equatorial latitude of auroral activity has been derived from both electron and optical observations with the DMSP satellites. Essentially all of these observations have been used to produce a nearly continuous plot of invariant geomagnetic latitude versus time during the 5-year interval June 1972 - September 1977. This plot has two main characteristics: (1) a diurnal variation of approximately ±5° which is somehow associated with the precession of the Earth's magnetic dipole axis about the Earth's rotation axis and (2) an irregular variation of roughly 5-10° for intervals of one to several days associated with the occurrences of solar flares and coronal holes. With the help of a condensed, Bartels-type display of these measurements, we conclude that (1) modest auroral expansions (to [lambda] ~ °) occur during the main body of high-speed streams from coronal holes and (2) great expansions (to [lambda] < 55°) occur at the leading edge of a high-speed stream or at a flat-produced interplanetary shock.

  • Document Type:
  • Supporting Files:
    No Additional Files
No Related Documents.
You May Also Like: