[en] The damage to underground facilities caused by earthquakes was evaluated in order to determine potential seismic risk to an underground nuclear waste repository. Earthquake effects were delineated in terms of both displacements and accelerations. For underground facilities, displacements are considered more damaging than accelerations. An evaluation of the data was made in terms of acceleration, velocity, and displacement as a function of earthquake magnitude, distance, and depth. Damage decreases with distance from the source and with depth below the ground surface. However, extensive damage can occur if the facility is cut by a fault or fault fissure along which a slip can occur during an earthquake. Peak acceleration decreases with depth; however, peak displacements show much less reduction with depth