Sunspot Areas, Flares and Filaments observed at the Stockholm Observatory in the Years 1950 and 1951

Abstract

Tables are presented giving sunspot areas, flares and filaments according to the solar routine observations carried out at the Stockholm Observatory in 1950 and 1951. The material has been distributed before as current reports to a number of Swedish institutions. A brief discussion is given and a description is made of the methods used for the announcements of the general solar activity.