Solar Physics

, Volume 5, Issue 2, pp 207–235 | Cite as

Cape Lyot Hα-heliograph results

An analysis of flare activity 1958–65
  • John H. Reid
Article
Received:

Abstract

The Lyot Hα-heliograph at the Royal Observatory, Cape of Good Hope was in almost daily operation from March 12, 1958 to December 31, 1965. From the records obtained, a definitive list of 2907 flares was compiled, their properties analyzed, and the results presented herein.

The data on East-West distribution of activity, although inconclusive, shows an asymmetry of flare activity with 56.5% of the flares West of the central meridian; this is partially due, however, to an inhomogeneous density distribution in the filtergrams.

Flare distribution with respect to heliographic longitude, association with spot types and number of spots in the group are also discussed. The frequency of flare areas, rise times, and durations are examined as is their relationship to distance from the disk centre.

Keywords

Flare Density Distribution Rise Time Disk Centre Daily Operation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© D. Reidel Publishing Company 1968

Authors and Affiliations

  • John H. Reid
    • 1
  1. 1.Lockheed Electronics CompanyHoustonU.S.A.

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