Abstract
Surface gravity waves have been used to probe flows in the two megameters beneath the photosphere using the techniques of timedistance helioseismology. The results suggest that supergranule velocities are smaller than at the surface. The outward flow outside a sunspot penumbra (the moat) is observed, as is an inward flow in the region beyond the moat.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Duvall, T. L. Jret al. 1996,Nature,379, 235.
Duvall, T. L. Jr, Gizon, L. 2000,Solar Phys.,192, 177.
Hansen, P. C. 1998,Rank-Deficient and Discrete III-Posed Problems: Numerical Aspects of Linear Inversion, SIAM, (Philadelphia).
Scherrer, P. H.et al. 1995,Solar Phys.,162, 129.
Tong, J.etal. 1998,Geophys. Res. Lett.,25, 1983.
Woodard, M. F. 1997,Astrophys. J.,485, 890.
Woodward, M. J. 1992,Geophys.,57, 15.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gizon, L., Duvall, T.L. & Larsen, R.M. Seismic tomography of the near solar surface. J Astrophys Astron 21, 339–342 (2000). https://doi.org/10.1007/BF02702420
Issue Date:
DOI: https://doi.org/10.1007/BF02702420