Accession Number : ADA017001

Title :   Examples of Plasma Flows within the Earth's Magnetosphere.

Descriptive Note : Research rept.,

Corporate Author : IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s) : Frank,L. A. ; Ackerson,K. L.

Report Date : SEP 1975

Pagination or Media Count : 25

Abstract : Examples of observed flows of plasmas in the dayside magnetosphere near the magnetopause, within the ring current in the local-evening sector, and at two positions simultaneously in the plasma sheet are presented. These measurements were gained with LEPEDEA plasma instruments on the satellites IMP's -6 and -7. Flow velocities inside the magnetopause in the dayside magnetosphere are typically 25 to 75 km/sec, and are directed generally parallel to the tangent to the nearby magnetopause with a small component directed into this boundary. Bulk flow speeds within the ring current ranged from the instrument threshold of about 20 km/sec to speeds of 50 km/sec. Strong tailward 'jetting' of plasmas, in the range of 200 to 300 km/sec, at geocentric radial distances about 35 (R sub E) in the plasma sheet is found to be often associated with the occurrence of magnetic substorms.

Descriptors :   *Magnetosphere, *Plasmas(Physics), Magnetic storms, Scientific satellites, Periodic variations

Subject Categories : Atmospheric Physics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE