Accession Number:

ADA102301

Title:

Study of Geomagnetic Storms, Solar Flares, and Centers of Activity in 1977, the Year of Onset of Solar Cycle 21,

Descriptive Note:

Corporate Author:

JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB

Personal Author(s):

Report Date:

1981-01-01

Pagination or Media Count:

23.0

Abstract:

Detailed comparison is made between various types of geomagnetic storms, solar flare activity and coronal holes for the year 1977. The Comprehensive Flare Index CFI, which quantifies x-ray, optical and radio emission, again proves to be an increasing reliable predictor statistically of flare-associated geomagnetic storms as the value of the CFI increases. Two sequences of recurrent geomagnetic storms could be associated with coronal holes extending below 30 deg heliographic latitude. The two most active regions of the year resulted in flare-sequential storms in which a coronal hole and related sequential storms developed subsequent to the decay of flare production in an adjacent active region. Author

Subject Categories:

  • Astrophysics
  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE