CLASSIFICATION OF SOLAR PROMINENCES FOR SUNSPOT CYCLE NO. 19 (1955-1964) - SUMMARY.
Abstract
The areas and behavior classifications of the prominences on the sun during Solar Cycle No. 19 are summarized, and a study is presented of the distribution of the various classes with solar latitude. During this solar cycle, 90 per cent of the prominences were of A types in which the material descended from the corona, and 16 per cent were of S types, associated with sunspots. The biggest class of prominences was the ANd or hedgerow type; the smallest, the ASl's of loop prominences. The overall trend in prominence areas was thus due mainly to the ANd prominences. North-south asymmetries of the areas reveal that for all classes of prominences together there was a northern excess except for the year 1961. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1967
- Accession Number
- AD0653573
Entities
People
- Donald H. Menzel
- F. Shirley Jones
Organizations
- Harvard College Observatory