Interactive comment on “Time – lapse gravity and levelling surveys reveal mass loss and ongoing subsidence in the urban subrosion prone area of Bad Frankenhausen/Germany” by Martin Kobe et al.

During four years (2014-2018) repeated gravity measurements have been made together with repeated leveling in an area in Germany affected by sink-holes. The formation of sink-holes and ground subsidence is a hazard in many areas, also in North-East Italy. The study poses the question whether the subsurface mass-loss associated to the subsurface erosion is measurable by repeated gravity measurements.