Accession Number : AD0616992

Title :   SECULAR VARIATIONS OF LONG-LIVED SUNSPOTS.

Descriptive Note : Scientific rept.,

Corporate Author : OSLO UNIV (NORWAY)

Personal Author(s) : Ringnes,Truls S.

Report Date : 17 SEP 1964

Pagination or Media Count : 40

Abstract : Number and area distribution of spot groups of intermediate and long lifetimes have been studied in the period 1889-1954, as well as the area development curves of individual long-lived spots in the period 1914-1954. Eigenson's recurrence indices have been revised. Various secular variations have been found. (Author)

Descriptors :   (*SUNSPOTS, PERIODIC VARIATIONS), (*ASTROPHYSICS, SUNSPOTS), DISTRIBUTION, TABLES(DATA), GRAPHICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE