The stability of magnetic fields relevant to two-ribbon flares

A. W. Hood*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The preflare structure, prior to two-ribbon flares, is thought to consist of magnetic field arcades. As a first approximation, the magnetic field is assumed to be invariant along the length of the arcade. The ideal MHD stability of such structures is studied using the energy method. The dense photosphere is simulated by line-typing the magnetic field and a discussion of boundary conditions is presented. Using the energy method, sufficient conditions for stability are obtained for certain magnetohydrostatic fields that also include the effect of gravity. Under certain circumstances, these conditions become necessary and sufficient. Some comments on resistive effects are mentioned.

Original languageEnglish
Pages (from-to)49-52
Number of pages4
JournalAdvances in Space Research
Issue number7
Publication statusPublished - 1984


  • Magnetic Field Configurations
  • Magnetohydrodynamic Stability
  • Solar Flares
  • Solar Magnetic Field
  • Boundary Conditions
  • Boundary Value Problems
  • Electrical Resistivity
  • Energy Transfer
  • Gravitational Effects
  • Photosphere


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