This work focuses on the assessment of seismic risk issues associated with the potassium salt deposit of Provadia and Soligorsk. The long-term studies, 1983–2007, of the only terrestrial Bulgarian salt deposit (Provadia, φ=43.06⁰N, λ=27.45⁰E) and Belarusian (Starobin φ=52.84⁰N, λ=27.47⁰E) in connection with the observed higher seismic activity and probable manifestations of technogenic seismicity in the region is presented. The characteristic features of the seismic processes are identified by the curves of recurrence of seismic events with an energy range of 4÷8. A quasi-periodic character of the seismicity activation over time against the general trend of increasing seismicity activation is established. It is shown that zones of epicentres of seismic events are larger that mining areas. Some differences in the pattern of seismic processes, such as: seismic activity in the range of small energies (K = 4–8) is higher in the Soligorsk region; events of the higher energy class K>9 characteristic of the Provadia region are carried out.