On March 13, 2023, the Operational Land Imager-2 (OLI-2) on Landsat 9 acquired these natural-color images of Tunulliarfik Fjord. The images have been pan-sharpened to bring out more detail. At the time, the fjord’s waters were capped with a layer of sea ice. Atop the ice there are several long, straight lines connecting the towns of Narsarsuaq and Qassiarsuk, and running the length of the fjord. Though cracks and ridges can form naturally in the ice, there are indications that people were likely involved with producing some of the tracks pictured here. Nathan Kurtz and several other scientists in the Cryospheric Sciences Laboratory at NASA’s Goddard Space Flight Center reviewed the images. Their consensus was that many of the tracks, especially those that include loops, were likely produced by vehicles, such as snowmobiles. “It seems likely that residents from the town or nearby were out on the ice, possibly hunting or traveling,“ Kurtz said. Traversing the frozen fjord with a vehicle would make sense given its size. The track that connects the small towns of Qassiarsuk and Narsarsuaq, visible in the first detailed image above, spans about 4 kilometers (2.5 miles). The track that runs the length of the fjord is at least 20 kilometers (12 miles) long.