Electromagnetic (EM) methods have proven useful to explore the electrical properties of the earth and are a standard geophysical tool in ground and airborne measurements, but less often in marine applications. The electrical resistivity which can be derived from EM data depends on various rock properties, such as porosity, permeability, mineral content, nature of pore-fluid, or presence of...
For decades, deep geological storage in former salt mines has been a widely recognized strategy for long-term radioactive waste disposal. However, in the case of the Asse II repository in Lower Saxony, groundwater inflow and instabilities in the geological structures rendered the mine unusable as a long-term solution. The nuclear waste needs to be recovered for safety reasons, hence the need...
Much of the uncertainty in current prognosis on sea level rise originate from different predictions for the contribution of the West Antarctic Ice Sheet. This contribution is mostly constrained from large-scale ice sheet models, which are designed to understand the ice sheet behaviour in response to external forces. An essential part of such models are flow relations, which relate applied...
Distributed acoustic sensing (DAS) measurement, due to high spatial and temporal resolution, has become very attractive in different applications in seismology, for instance seismic noise analysis and seismic event detection. The physical quantity that is measured by DAS is strain or strain rate of optic fiber cable, which is related to the spatial gradient of displacement and velocity that is...
Experiments in fundamental research are becoming more and more sensitive and are often limited by seismic noise and other environmental perturbations. The next generation of gravitational wave detectors on Earth needs to suppress seismic noise by additional 5-6 orders of magnitude (compared to current detectors) to measure gravitational waves at 10Hz emitted by so far unresolved cosmological...
