Seismic Grid (IMAGE) University of Alaska Fairbanks Caption An early spring view of tracks left by a 3D seismic survey conducted in winter 2017-2018. The spacing of the tracks in the photo is 200-by-400 meters, rather than the 200-by-200-meter grid proposed by SAExporation. The photo is not an example of the long-term damage found by researchers in other areas. Credit Photo by Matt Nolan Usage Restrictions Include photo credit, full cutline 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.