Accession Number : AD0632166

Title :   SECULAR VARIATIONS IN THE MAGNETIC FIELD STRENGTH OF SUNSPOT GROUPS.

Descriptive Note : Scientific rept.,

Corporate Author : OSLO UNIV (NORWAY) INST OF THEORETICAL ASTROPHYSICS

Personal Author(s) : Ringnes,Truls S.

Report Date : 1965

Pagination or Media Count : 46

Abstract : The relation between area and magnetic field strength of sunspot groups, the magnetic life history of long -lived spots and frequency distribution of observed maximum field strength of sunspot groups were studied over the period 1917-1958. The secular variations which are detected are discussed and compared with the secular variations established previously in the number of sunspot groups, their areas, area distribution etc. Finally a brief account is given of the eighty-year cycle of sunspots. (Author)

Descriptors :   (*SUNSPOTS, *MAGNETIC FIELDS), MAGNETOHYDRODYNAMICS, ASTROPHYSICS, SOLAR ATMOSPHERE

Subject Categories : Astrophysics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE