Sumatra Quake (IMAGE) University of Southern California Caption Tsunami propagation pattern from earthquake west of Sumatra island, Indonesia. Credit USC Tsunami Research Center/Northwestern University Usage Restrictions credit: USC Tsunami Research Center/Northwestern University 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.