Accession Number:

ADA231457

Title:

Some Comments on the East-West Solar Flare Distribution during the 1976-1985 Period

Descriptive Note:

Corporate Author:

AIR FORCE SYSTEMS COMMAND HANSCOM AFB MA GEOPHYSICS LAB

Report Date:

1990-01-01

Pagination or Media Count:

14.0

Abstract:

We present the results of an analysis of the east-west asymmetry in the solar flare distribution, observed during the years from 1976 to 1985. We conclude that flare events, all type of H alpha flares, are not uniformly spread in heliolongitude over the solar disc when considering events with heliolongtitudes greater than 60 degrees, or even closer to central meridian for certain periods. This lack of homogeneity, however, does not have an influence on the definition of east-west asymmetries. Simple random distribution of flares over the solar disc can not account for the asymmetries found, but they can be explained in terms of the transit of active regions in front of the observers position. Nonetheless, this is not the case for the distribution of flares equal or more intense than importance 1F or to 1F importance observed during 1979.

Subject Categories:

  • Astrophysics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE