Accession Number:

ADA083029

Title:

Geomagnetic Activity and Hale Sector Boundaries.

Descriptive Note:

Technical rept.,

Corporate Author:

STANFORD UNIV CA INST FOR PLASMA RESEARCH

Report Date:

1980-02-01

Pagination or Media Count:

20.0

Abstract:

The variation of the geomagnetic activity index Ap at the Interplanetary Magnetic Field IMF sector boundaries to - and - to has been studied for three solar cycles, separating data into vernal and autumnal equinoxes. It was found that a reported increase in Ap as an effect of a Hale boundary can be better attributed to the occurrence of a negative IMF Bz component in the geocentric solar magnetospheric coordinate system and to the occurrence of high speed solar wind streams.

Subject Categories:

  • Astrophysics
  • Atmospheric Physics
  • Geomagnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE