Report for Contract N00014-91-J-1112 (Stanford University)
Abstract
The aim of the research supported by the ONR contract has been to improve our understanding of factors leading to solar flares, with the long-term goal of improving predictions of these events. To achieve this goal, we have studied spatial and temporal patterns in solar flare occurrences. We have found that solar flares tend to occur in 'hot spots,' which rotate rigidly (Bai 1990). The two northern-hemisphere hot spots, which rotate with a synodic period of 26. 727 days (24.905 days in sidereal), persisted in the same locations during cycles 20 through 22. We have made extensive studies on quasi-periodic changes of flare occurrence rates. Occurrence rates of major flares, regardless of selection criteria, episodically show periodic variations
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1993
- Accession Number
- ADA273596
Entities
People
- Peter A. Sturrock
Organizations
- Stanford University