RECENT DISPLACEMENTS REGISTERED IN SELECTED CAVES OF DOBRÁ VODA KARST AREA IN SLOVAKIA

Micro-displacement monitoring in Slopy and Zbojnicka caves is described. It started at the end of 2005 with the use of verified, stable and sensitive 3D crack gauges TM71 produced by GESTRA Sedloňov. Two gauges were installed in the caves across significant tectonic structures. Registered displacements are pertinent to the last significant earthquake events. The first one appeared in March 13, 2006 at Vrbove, M=3.2; and later in August 5-8, 2006, a swarm of 10 quakes Mmax= 2.2 at Trstin was registered. The results indicated trends of dextral strike-slip displacements across observed fault structures in both of those caves.