Abstract
We have modified our solar magnetograph to measure velocities at the solar surface, rather than magnetic fields. Using this apparatus, we have observed fluctuations of period 2 h 40 min, which are remarkably stable. The interpretation of this phenomenon seems to cause much theoretical difficulty.
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Severny, A., Kotov, V. & Tsap, T. Observations of solar pulsations. Nature 259, 87–89 (1976). https://doi.org/10.1038/259087a0
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DOI: https://doi.org/10.1038/259087a0
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