The geotechnical centrifuge at UCSD is a model C61-3 obtained from Actidyne Systemes. The centrifuge has a radius of 2 meters to the platform, which has dimensions of 0.5 by 0.7 meters. The centrifuge has a rating of 50 g-tons, and can reach a maximum g-level of 130. The centrifuge is equipped with electrical slip-rings and joints for hydraulic pressure. The centrifuge has an on-board data acquisition system, and was recently equipped with a 1-d shaking table for earthquake simulations.