Tiché hrozby: Zemětřesné roje

Do we truly know everything about what happens under the ground? Is the whole Czech mass really a dead, old structure? The fifth episode of the popular science documentary film cycle Silent Threats, from the Academy of Sciences of the Czech Republic, reveals the secret processes taking place in the landscape of Western Bohemia. What do we know about so-called "earthquake clusters"? Can these small quakes be a threat to local dams or spa springs that are located in such areas? West- ern Bohemia is an irreplaceable natural laboratory due to the presence of earthquake clusters. How are earthquake clusters being monitored and inspected? What exactly goes on when they happen? (Academia Film Olomouc)