By observing changes in shear-wave splitting time of local earthquakes, changes of stress can be observed in the ray path of waves radiated from the sources. Near source regions of frequent local earthquakes it is possible to observe stress changes, possibly in the build-up period of large earthquakes or eruptions. The method has already been applied in a successful stress forecast before an earthquake, and changes seen in hindsight before other events are promising for the usefulness of the method. The method has been developed within Subproject 3 at UEDIN.DGG. The method is applied for observing stress changes in seismic data from Iceland at UEDIN.DGG in close co-operation with IMOR.DG, for possibly preparing stress forecasts of earthquakes or volcanic eruptions, and for testing, as further described in Subproject 3.