SECULAR VARIATIONS IN THE MAGNETIC FIELD STRENGTH OF SUNSPOT GROUPS.
OSLO UNIV (NORWAY) INST OF THEORETICAL ASTROPHYSICS
Pagination or Media Count:
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
- Plasma Physics and Magnetohydrodynamics