Abstract
On 18 April 2015, a regional tremor with an energy E=4·109 J occurred in the main saddle of fault VIa. This phenomenon emerged as result of summing up of stresses caused by underground exploitation conducted in the vicinity of natural faults with unrelaxed tectonic stresses, which resulted in the very strong influence of this tremor on the surface infrastructure and on the emotional well-being of local people. This analysis suggests that there is a statistical relationship between these values. Diversity of location both of the size of measured vibration parameters, damages in the buildings and of feelings of the vibrations prove an unequal radiation of the seismic waves caused by the amplifying influence of the fault zone.