Fig. 4
From: Void discovery inside Esztramos Hill using muographic methods
Missing rock values of the four measurements. Azimuth angle is depicted on the edge of the muograms, zenith angle increases outwards from the central direction. Cardinal directions are indicated on the edges. An average density of 2.71 \(\mathrm {g/cm^3}\) was used to convert opacity to rock length. White dotted lines mark the outlines of areas affected by known cavities, continuous green ones mark those affected by the void identified by inversion and dashed blue lines mark the effect of the nearby dolomite.
