Accession Number : AD0784429

Title :   The Spiral Interplanetary Magnetic Field: A Polarity and Sunspot Cycle Variation.

Descriptive Note : Technical rept.,

Corporate Author : STANFORD UNIV CALIF INST FOR PLASMA RESEARCH

Personal Author(s) : Svalgaard,Leif ; Wilcox,John M.

Report Date : JUN 1974

Pagination or Media Count : 13

Abstract : Spacecraft observations near the earth of the yearly average direction of the interplanetary magnetic field during the sunspot maximum year 1968 showed a deviation from the spiral field of E. N. Parker's classical description. The included angle between the average field direction when the field polarity was away from the sun and the average direction for toward polarity was 168 degrees, rather than 180 degrees as predicted by Parker. This effect appears to have a sunspot cycle variation. (Author)

Descriptors :   *Interplanetary space, Solar cycle, Sunspots, Polarity, Solar flares, Solar wind

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE