Wikipedia describes the "Hilina Slump," as a hillside landmass "on the flank of the Kilauea Volcano on the southeast side of the Big Island of Hawaii, is the most notable of several "slumps" (a form of mass wasting) that ring each of the Hawaiian Islands. Slumps and debris avalanches are geological processes by which material deposited at a volcano's vents are transferred downward and seaward, eventually spilling onto the seabed to broaden the island."
At what point COULD the Hilina Slump slide off into the ocean?