Earthquakes frequently cause multiple rock slides during each event, and a number of such rockslides are documented from Switzerland. Rock slides in the Kander valley and at Rinderhorn appear to be contemporaneous about 9,800-9,600 years ago within dating uncertainty, and sediment deposits within Lake Lucerne and Lake Seelisberg indicate that an earthquake with magnitude exceeding 6 took place 9,870-9,960 years ago. The Gemmi Fault is located within the area and has an earthquake that took place 8,700±2,000 years ago; however earthquakes in Switzerland often are not bound to specific fault systems. Climatic triggers of clustered rockslides are possible but speculative.