Chinese Science Bulletin

, Volume 58, Issue 4, pp 474–477

Observational evidences for the speed of the gravity based on the Earth tide

Authors

    • Institute of Geology and GeophysicsChinese Academy of Sciences
    • National Astronomical ObservatoryChinese Academy of Sciences
  • ChangCai Hua
    • Institute of GeophysicsChina Earthquake Administration
  • Wu Wen
    • Institute of Geology and GeophysicsChinese Academy of Sciences
  • ShunLiang Chi
    • University of Chinese Academy of Sciences
  • QingYu You
    • Institute of Geology and GeophysicsChinese Academy of Sciences
  • Dan Yu
    • Network Center of China Earthquake Administration
Open AccessArticle Theoretical Physics

DOI: 10.1007/s11434-012-5603-3

Cite this article as:
Tang, K., Hua, C., Wen, W. et al. Chin. Sci. Bull. (2013) 58: 474. doi:10.1007/s11434-012-5603-3

Abstract

We have found that the current practical Newtonian formula for the gravity tide of the Earth implies a hypothesis that gravity travels at the speed of light; furthermore, we have derived and solved the propagation equation of gravity using the observation data of Earth tides from Shiquanhe and Wushi, after correction of phase lag due to the anelasticity of the Earth, and found that the speeds of gravity are from 0.93 to 1.05 times the speed of light with a relative error of about 5%. This provides first set of strong evidences to show that the speed of gravity is the same as the speed of light.

Keywords

Earth tide apparent position phase lag speed of light speed of gravity propagation equation of gravity

Copyright information

© The Author(s) 2012