February 1, 2011: Earth's shape: (taught be William C. Hammond) Descriptive approach to changes in Earth's shape including the ice and ocean surface. The long-term mean shape of the Earth will be considered briefly. Main focus will be on changes in the shape: starting from co-seismic displacements, seismic waves and free oscillations, going over Earth and ocean tides, atmospheric, hydrological, and glacial loading, to sediment loading and tectonic changes, the various phenomena of surface displacements will be considered.