Drilling Holes for Explosives (IMAGE) University of Alaska Fairbanks Caption Martin Truffer drills holes for explosives in the surface of Taku Glacier. The explosions produce seismic waves that bounce off the sediment below the glacier, providing information about its thickness and character. Credit Photo courtesy of Douglas Brinkerhoff Usage Restrictions Please mention who provided the photo 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.