On the temporal relationship between Hα filament eruptions and soft X-ray emissions

P. W. Schuck, J. Chen, I. B. Schwartz, Vasyl Yurchyshyn

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


A technique for investigating the temporal relationship between Ha filament eruptions and soft X-ray flux is presented. The method is fast, simple, based on statistical measures, and requires no a priori knowledge regarding the location of the filaments on the solar disk. The method is used to study the filament eruption associated with a coronal mass ejection and the M-class flare that originated from NOAA Active Region 9163 on 2000 September 12. The technique provides a quantitative determination of the temporal relationship between changes in the Ha filament and soft X-ray flux. We conclude that the filament eruption begins 2 hr prior to the first detectable enhancement in soft X-ray flux.

Original languageEnglish (US)
Pages (from-to)L133-L136
JournalAstrophysical Journal
Issue number2 II
StatePublished - Aug 1 2004

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Methods: statistical
  • Stars: flare
  • Sun: chromosphere
  • Sun: coronal mass ejections (CMEs)
  • Sun: filaments
  • Techniques: image processing


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