The study of the sun's internal structure using observations of the frequencies and strengths of normal mode
oscillations detected at the surface by their Doppler shifts. Such vibrations were first discovered in the 1960s by
researchers at the California Institute of Technology.
--. Sky & Telescope, 236, Sept. 1991.
Duvall, T. L.; Jefferies, S. M.; Harvey, J. W.; and Pomerantz, M. A. "Time Distance Helioseismology." Nature 362, 430-432, 1993.
Gough, D. O. and Toomre, J. "Seismic Observations of the Solar Interior." Ann. Rev. Astron. Astrophys. 29, 627-685, 1991.
Harvey, J. "Helioseismology." Phys. Today 48, 32-38, Dec. 1995.
Hill, F. et al. In Solar Interior and Atmosphere, Part II (Ed. A. N. Cox, W. C. Livingston, and M. S. Matthews).
Tucson, AZ: University of Arizona Press, pp. 329-660, 1991.
Lang, K. R. Sun, Earth, Sky. New York: Springer-Verlag, 1995.
Libbrecht, K. G. and Woodard, M. F. "Advances in Helioseismology." Science 253, 152-157, 1991.
Stix, M. The Sun, An Introduction. Berlin: Springer-Verlag, 1991.
