Helioseismic observations of magnetic flux emergence and flare effects

A. G. Kosovichev, T. L. Duvall

Research output: Contribution to journalArticlepeer-review

Abstract

Time-distance helioseismology and data from SOHO/MDI are used for obtaining 3D images of subsurface sound-speed perturbations and maps of plasma flows, associated with emerging magnetic flux and flaring activity of large active regions in October 2003. The results reveal extremely complicated dynamical processes in the upper convection zone and indicate that subsurface shear flows may play an important role in magnetic energy release in solar flares. Strong X-class flares generated impulsive seismic waves ("sunquakes"), traveling through surrounding sunspots, thus providing new insight into the interaction of seismic waves with magnetic fields.

Original languageEnglish (US)
Pages (from-to)365-368
Number of pages4
JournalProceedings of the International Astronomical Union
Volume2
Issue number233
DOIs
StatePublished - Mar 1 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

Keywords

  • Flares
  • Gamma rays
  • Interior
  • Magnetic fields
  • Oscillations
  • Particle emission
  • Sun: helioseismology
  • Sunspots
  • X-rays

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