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Please note that this IERS component ceased operation in 2009.
Within the IERS Global Geophysical Fluids Center the Special Bureau for Mantle (SBM) provides information and data on geodynamic effects due to motions in the mantle relevant to the study of the Earth's variable rotation.
Benjamin F. Chao (1 Jan. 2001 - Jan. 2006), Erik R. Ivins (29 June 2006 - 31 Dec. 2009)