Comparison of subsurface sound-speed structures of three active regions

S. Couvidat, A. C. Birch, S. P. Rajaguru, A. G. Kosovichev

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We analyze three solar active regions observed with the MDI instrument onboard SoHO (Scherrer et al. 1995). We apply the time-distance helioseismology formalism to derive the travel times of acoustic waves propagating through these active regions. The inversion of these acoustic travel times gives us access to the 3D sound-speed structure below the sunspots. We compare the main characteristics of these inversion results as a function of the active region size and magnetic field strength.

Original languageEnglish (US)
Pages (from-to)75-76
Number of pages2
JournalProceedings of the International Astronomical Union
Issue number233
StatePublished - Mar 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science


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