Salt Lake City active source experiment (IMAGE) Seismological Society of America Caption Sensors for an active seismic source experiment are contained in a firehose as the researchers drive through downtown Salt Lake City, Utah. Credit Lee Liberty Usage Restrictions Please include credit information 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.