Dr. Anne Obermann leads this group which uses seismic interferometry to image and monitor complex subsurface structures at high resolution, relying on passive seismic data recordings. Seismic interferometry refers to the principle of reconstructing seismic responses associated with virtual sources by cross-correlating seismic wavefield records obtained at different receiver locations. By applying and integrating technological advances (e.g. Distributed Acoustic Sensing, dense seismic arrays), the group can track subtle changes in the Earth's structure that were previously undetectable. The group’s research applies to various contexts, including magma chambers, fault zones, groundwater and geothermal reservoirs, and CO2 storage sites.