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Space Science Reviews

, Volume 28, Issue 4, pp 387–421 | Cite as

Dynamic phenomena in the visible layers of sunspots

  • R. L. Moore
Article

Abstract

The empirical properties of the various dynamic phenomena are reviewed and interrelated with emphasis on recent observational results. The topics covered are:
  1. 1.

    Introduction

     
  2. 2.

    Aperiodic Phenomena

     
  3. 2.1.

    Externally Driven Phenomena

     
  4. 2.1.1.

    Umbral Flares

     
  5. 2.1.2.

    Inverse Evershed Flow

     
  6. 2.2.

    Internally Driven Phenomena

     
  7. 2.2.1

    Penumbra

     
  8. 2.2.1.1.

    Penumbral Grains

     
  9. 2.2.1.2.

    Evershed Flow

     
  10. 2.2.2.

    Umbra

     
  11. 2.2.2.1.

    Umbral Dots

     
  12. 2.2.2.2.

    Inhomogeneity of the Umbral Magnetic Field

     
  13. 2.2.2.3.

    Umbral Turbulence

     
  14. 3.

    Oscillations and Waves

     
  15. 3.1.

    Chromosphere

     
  16. 3.1.1.

    Umbra: Oscillations and Flashes

     
  17. 3.1.2.

    Penumbra: Running Waves and Dark Puffs

     
  18. 3.2.

    Photosphere

     
  19. 4.

    Overview

     

It is proposed from the observations that umbral dots and penumbral grains are essentially the same phenomenon, and that the observational goal of highest priority with respect to both the origin of the periodic phenomena and the problem of the missing heat flux is to better determine the nature of these elementary bright features.

Keywords

Heat Flux Flare Observational Result Dynamic Phenomenon Bright Feature 
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 1981

Authors and Affiliations

  • R. L. Moore
    • 1
  1. 1.Big Bear Solar Observatory, California Institute of TechnologyUSA

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