This volume treats the key aspects that must be known when dealing with continuous space
geodetic or terrestrial geodetic observations. The signals of Earth core resonance are
discussed as well as tidal effects on Earth polar motion and on earthquake triggering.
Hydrologic loading be it ocean tides or subsurface water flows is discussed. These signals
compete with crustal deformation observations of earthquakes (e.g. Gorkha 2015) during
interseismic periods and on volcanoes (Elbrus Caucasus). The instrumentation that is covered
includes superconducting gravimeters continuous seafloor gravimeters interferometric tilt and
strain meters and GNSS networks. The articles give an up-to-date account of research in which
the Earth tides are a benchmark signal for the sophisticated instrumentation mounted on
satellites or the surface observing time-variable signals of an evolving Earth. Scientists
studying the earthquake cycle and geodetic monitoring will find useful material. For students
in the geosciences the collection offers a good overview of the broad spectrum of topics
related to the Earth geodetic monitoring.
