The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. The radar data is shown in detail as curtains of the radar data are dissolved away to display the layers of the ice sheet in the interior of the crater.
", "items": [ { "id": 237893, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397193, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/Hiawatha.0590_print.jpg", "filename": "Hiawatha.0590_print.jpg", "media_type": "Image", "alt_text": "This visualization shows the location of the Hiawatha Glacier near Inglefield Land in northwest Greenland. The surface of the ice sheet fades away to show the impact crater discovered beneath the ice sheet. A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows that the diameter of the crater is more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. 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A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows that the diameter of the crater is more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. The radar data is shown in detail as curtains of the radar data are dissolved away to display the layers of the ice sheet in the interior of the crater.", "width": 80, "height": 40, "pixels": 3200 } }, { "id": 237891, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397198, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/4706_Hiawatha_Crater.webmhd.webm", "filename": "4706_Hiawatha_Crater.webmhd.webm", "media_type": "Movie", "alt_text": "This visualization shows the location of the Hiawatha Glacier near Inglefield Land in northwest Greenland. The surface of the ice sheet fades away to show the impact crater discovered beneath the ice sheet. A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows that the diameter of the crater is more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. The radar data is shown in detail as curtains of the radar data are dissolved away to display the layers of the ice sheet in the interior of the crater.", "width": 1080, "height": 606, "pixels": 654480 } }, { "id": 237892, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397192, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/frames/3840x2160_16x9_30p/", "filename": "3840x2160_16x9_30p", "media_type": "Frames", "alt_text": "This visualization shows the location of the Hiawatha Glacier near Inglefield Land in northwest Greenland. The surface of the ice sheet fades away to show the impact crater discovered beneath the ice sheet. A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows that the diameter of the crater is more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. The radar data is shown in detail as curtains of the radar data are dissolved away to display the layers of the ice sheet in the interior of the crater.", "width": 3840, "height": 2160, "pixels": 8294400 } }, { "id": 237896, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 850190, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/4706_Hiawatha_Crater.en_US.vtt", "filename": "4706_Hiawatha_Crater.en_US.vtt", "media_type": "Captions", "alt_text": "This visualization shows the location of the Hiawatha Glacier near Inglefield Land in northwest Greenland. The surface of the ice sheet fades away to show the impact crater discovered beneath the ice sheet. A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows that the diameter of the crater is more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. The radar data is shown in detail as curtains of the radar data are dissolved away to display the layers of the ice sheet in the interior of the crater.", "label": "English", "language_code": "en-US" } }, { "id": 237897, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 850189, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/4706_Hiawatha_Crater.en_US.srt", "filename": "4706_Hiawatha_Crater.en_US.srt", "media_type": "Captions", "alt_text": "This visualization shows the location of the Hiawatha Glacier near Inglefield Land in northwest Greenland. The surface of the ice sheet fades away to show the impact crater discovered beneath the ice sheet. A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows that the diameter of the crater is more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. The radar data is shown in detail as curtains of the radar data are dissolved away to display the layers of the ice sheet in the interior of the crater.", "label": "English", "language_code": "en-US" } }, { "id": 237887, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397197, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/4706_Hiawatha_Crater.mp4", "filename": "4706_Hiawatha_Crater.mp4", "media_type": "Movie", "alt_text": "This visualization shows the location of the Hiawatha Glacier near Inglefield Land in northwest Greenland. The surface of the ice sheet fades away to show the impact crater discovered beneath the ice sheet. A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows that the diameter of the crater is more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. The radar data is shown in detail as curtains of the radar data are dissolved away to display the layers of the ice sheet in the interior of the crater.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 237889, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397196, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/4706_Hiawatha_Crater.mov", "filename": "4706_Hiawatha_Crater.mov", "media_type": "Movie", "alt_text": "This visualization shows the location of the Hiawatha Glacier near Inglefield Land in northwest Greenland. The surface of the ice sheet fades away to show the impact crater discovered beneath the ice sheet. A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows that the diameter of the crater is more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. The radar data is shown in detail as curtains of the radar data are dissolved away to display the layers of the ice sheet in the interior of the crater.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 237888, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397200, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/Hiawatha_Prores_4k.mp4", "filename": "Hiawatha_Prores_4k.mp4", "media_type": "Movie", "alt_text": "This visualization shows the location of the Hiawatha Glacier near Inglefield Land in northwest Greenland. The surface of the ice sheet fades away to show the impact crater discovered beneath the ice sheet. A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows that the diameter of the crater is more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. The radar data is shown in detail as curtains of the radar data are dissolved away to display the layers of the ice sheet in the interior of the crater.", "width": 3840, "height": 2160, "pixels": 8294400 } }, { "id": 237890, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397199, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/Hiawatha_Prores_4k.mov", "filename": "Hiawatha_Prores_4k.mov", "media_type": "Movie", "alt_text": "This visualization shows the location of the Hiawatha Glacier near Inglefield Land in northwest Greenland. The surface of the ice sheet fades away to show the impact crater discovered beneath the ice sheet. A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows that the diameter of the crater is more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.The visualization also shows how the scientists from Germany's Alfred Wegener Institute (AWI) flew the Polar 6 aircraft (a DC-3T) to collect radar data over the Hiawatha impact crater. The radar data is shown in detail as curtains of the radar data are dissolved away to display the layers of the ice sheet in the interior of the crater.", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} }, { "id": 323087, "url": "https://svs.gsfc.nasa.gov/4706/#media_group_323087", "widget": "Basic text with HTML", "title": "", "caption": "", "description": "The Hiawatha impact crater was first suspected to exist in the summer of 2015, from examination of a compilation of Greenland's sub-ice topography radar measurements made by NASA over two decades. Subsequently, a team of scientist at Germany's Alfred Wegener Institute flew an airborne survey over the region in the spring 2016, using a new ultrawideband radar sounder developed by the Center for Remote Sensing of Ice Sheets at The University of Kansas.
Ice-penetrating radar sends radio waves downward into the ice sheet and measures the energy reflected back from within the ice sheet and the ground beneath. The radar data detects layers in the ice generated by climate events in the past. The radar data (\"radargrams\") is then displayed on curtains in the location where it was observed showing the layers in the ice.
As the visualization shows the plane flying inland over Hiawatha Glacier, the ice sheet is cut away, leaving the radargram on the interior cutting plane. At this point, half of the depression of the Hiawatha impact crater is visible. A green grid fades in over the surface of the ice sheet showing the location of the flights that collected the radar data in spring 2016. The entire ice-sheet surface fades away and the full crater is visible as arrows point out the locations of the peaks in the central uplift and a red cylinder shows the best-fit rim of the impact crater. Radargram \"curtains\" fade on and are subsequently removed two at a time to allow examination of the structure of the ice that fills the crater. Note that the lower layers of ice near the crater floor appear disturbed, while the upper layers appear smooth and undisturbed.
Subsequent helicopter visits to the deglaciated terrain in front of Hiawatha Glacier by scientists from the Natural History Museum in Denmark recovered sediment samples from the main river that discharges water from beneath Hiawatha Glacier, through the northwestern rim breach. Laboratory examination revealed that these sediment samples contained shocked quartz and elevated platinum-group-element concentrations, both signs that the sediment records evidence of the impact of an iron asteroid more than one kilometer wide. The Hiawatha impact crater is potentially one of the youngest large impact craters on Earth.", "items": [], "extra_data": {} }, { "id": 323089, "url": "https://svs.gsfc.nasa.gov/4706/#media_group_323089", "widget": "Single image", "title": "", "caption": "", "description": "A still image showing the Greenland Ice Sheet and the Hiawatha Glacier.", "items": [ { "id": 237898, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397203, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/Hiawatha_v45_scene1_4k_5mtopo.1665_print.jpg", "filename": "Hiawatha_v45_scene1_4k_5mtopo.1665_print.jpg", "media_type": "Image", "alt_text": "A still image showing the Greenland Ice Sheet and the Hiawatha Glacier.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 237899, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397204, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/Hiawatha_v45_scene1_4k_5mtopo.1665.tif", "filename": "Hiawatha_v45_scene1_4k_5mtopo.1665.tif", "media_type": "Image", "alt_text": "A still image showing the Greenland Ice Sheet and the Hiawatha Glacier.", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} }, { "id": 323090, "url": "https://svs.gsfc.nasa.gov/4706/#media_group_323090", "widget": "Single image", "title": "", "caption": "", "description": "A still image showing the ice sheet removed in the region around the Hiawatha Glacier. The bed topography under the ice clearly shows the Hiawatha crater.", "items": [ { "id": 237901, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397206, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/Hiawatha.2753_print.jpg", "filename": "Hiawatha.2753_print.jpg", "media_type": "Image", "alt_text": "A still image showing the ice sheet removed in the region around the Hiawatha Glacier. The bed topography under the ice clearly shows the Hiawatha crater.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 237900, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397205, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004706/Hiawatha.2753.tif", "filename": "Hiawatha.2753.tif", "media_type": "Image", "alt_text": "A still image showing the ice sheet removed in the region around the Hiawatha Glacier. 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This video shows how that discovery came together. Complete transcript available. || combined_cut_8.0_1.00540_print.jpg (1024x576) [126.7 KB] || combined_cut_8.0_1.00540_searchweb.png (320x180) [92.1 KB] || combined_cut_8.0_1.00540_web.png (320x180) [92.1 KB] || combined_cut_8.0_1.00540_thm.png (80x40) [6.2 KB] || combined_cut_8.0_1.webm (1920x1080) [34.6 MB] || Greenland_crater_discovery_final_720.mov (1280x720) [232.3 MB] || Greenland_crater_discovery_final_1080.mov (1920x1080) [329.3 MB] || Greenland_crater_discovery.en_US.srt [5.5 KB] || Greenland_crater_discovery.en_US.vtt [5.5 KB] || Greenland_meteor_crater_1920.mp4 (1920x1080) [2.3 GB] || Greenland_crater_discovery_final.mp4 (3840x2160) [2.8 GB] || ", "release_date": "2018-11-14T13:50:00-05:00", "update_date": "2025-01-06T01:32:59.918190-05:00", "main_image": { "id": 404107, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012900/a012941/combined_cut_8.0_1.00540_print.jpg", "filename": "combined_cut_8.0_1.00540_print.jpg", "media_type": "Image", "alt_text": "It took the combined efforts of an international team of scientists to unravel the mystery of the Hiawatha crater. This video shows how that discovery came together. Complete transcript available.", "width": 1024, "height": 576, "pixels": 589824 } } ], "newer_versions": [], "older_versions": [], "alternate_versions": [ { "id": 4572, "url": "https://svs.gsfc.nasa.gov/4572/", "page_type": "Visualization", "title": "The Hiawatha Impact Crater", "description": "The series of visualizations below are derived from satellite imagery and radar sounding. They portray both the location and size of the 31-kilometer-wide impact crater beneath Hiawatha Glacier. They also portray the structure of the glacier ice that flows into and fills the crater.The Hiawatha impact crater was first suspected to exist in the summer of 2015, from examination of a compilation of Greenland's sub-ice topography radar measurements made by NASA over two decades. The visualizations of the subsurface shown below are derived from a spring 2016 airborne survey by Germany's Alfred Wegener Institute, using a new ultrawideband radar sounder developed by the Center for Remote Sensing of Ice Sheets at The University of Kansas. Subsequent helicopter visits to the deglaciated terrain in front of Hiawatha Glacier by scientists from the Natural History Museum in Denmark recovered sediment samples from the main river that discharges water from beneath Hiawatha Glacier, through the northwestern rim breach. Laboratory examination revealed that these sediment samples contained shocked quartz and elevated platinum-group-element concentrations, both signs that the sediment records evidence of the impact of an iron asteroid more than one kilometer wide. The Hiawatha impact crater is potentially one of the youngest large impact craters on Earth.In the visualizations below, the elevation of the topography of the bed, the ice surface and the radar curtains have been exaggerated ten times in order to better illustrate their structure. || ", "release_date": "2018-11-14T14:00:00-05:00", "update_date": "2025-02-02T22:33:21.416878-05:00", "main_image": { "id": 413069, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004500/a004572/Hiawatha_v45_scene1_4k_5mtopo.1600_print.jpg", "filename": "Hiawatha_v45_scene1_4k_5mtopo.1600_print.jpg", "media_type": "Image", "alt_text": "Starting from a global view, this visualization zooms into Inglefield Land in northwest Greenland and shows the location of Hiawatha Glacier. The surface of the ice sheet is then faded away to show the impact crater beneath the ice sheet. A red cylinder shows the best-fit rim of the impact crater and a measuring stick shows the diameter as more than 31 kilometers across. The size of the crater is compared to the cities of Washington, DC and Paris, France.This video is also available on our YouTube channel.", "width": 1024, "height": 576, "pixels": 589824 } } ] }