Marc Eberhard, University of Washington (IMAGE) University of Washington Caption Civil engineering professor Marc Eberhard stands at Haiti's main port in Port-au-Prince. The soil beneath liquefied, which causes paved surfaces like this one to collapse. Credit Marc Eberhard, University of Washington Usage Restrictions With credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.