Solar Physics

, Volume 12, Issue 3, pp 447–457 | Cite as

Flare-associated coronal expansion phenomena

  • Anton Bruzek
  • Howard L. Demastus
Article
Received:

Abstract

Two classes of coronal expansion phenomena have been studied in Sacramento Peak coronal movies: Slow, slightly decelerated expansion phenomena (v=∼10− =∼ 2 km/sec) and fast, accelerated, quasi-exploding arches (v =∼ 10 - > 100 km/sec). The various phenomena were found to be associated with flares in different ways: The slow expansions were long lived post-flare phenomena initiated by the flare; the accelerated expanding arches were either (a) arches expanding prior to and apparently exploding at flare onset, or (b) arches apparently emerging from the flare (probably in its initial phase) and rapidly expanding and exploding, or (c) the expansion and disruption of (originally stable) coronal arches during occurrence of a distant flare. These expansions may be considered as evidence for corresponding flare associated changes in the coronal magnetic field.

Keywords

Flare Solar Limb Coronal Structure Chromospheric Activity Slow Expansion 
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 1970

Authors and Affiliations

  • Anton Bruzek
    • 1
  • Howard L. Demastus
    • 2
  1. 1.Fraunhofer InstitutFreiburg i. Br.Germany
  2. 2.Sacramento Peak Observatory, AFCRLSunspotU.S.A.

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