Penn State assembly (IMAGE) University of Texas at Austin Caption A lab-made fault at Penn State that was used to detect earthquake foreshock patterns in research led by the UT Jackson School of Geosciences. The device squeezes rock blocks in a vice while sensors listen for miniature tremors. Credit Chas Bolton Usage Restrictions Please include credit. License Original 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.