Study area and tectonic background. a. Map with well trajectories of Th1, Th2, and Th3 and the top of the reservoir section marked by red points as well as fault zones of the Geothermie Atlas (STWIVT 2010). b. Map of the region south of Munich with the tectonic sections of the unfolded and folded Molasse Basin, geothermal wells, and the fault zones found in the tertiary structures of the Geothermie Atlas. c. Overview map from Geotis (Schulz et al. 2009) and the investigation area marked by a black asterisk.