The Spiral Interplanetary Magnetic Field: A Polarity and Sunspot Cycle Variation.
STANFORD UNIV CALIF INST FOR PLASMA RESEARCH
Pagination or Media Count:
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. Parkers 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