{ "id": 13146, "url": "https://svs.gsfc.nasa.gov/13146/", "page_type": "Produced Video", "title": "NASA Finds Second Massive Greenland Crater", "description": "Text-on-screen video about a possible new impact crater under Greenland's ice || C2_TOS_Final.00768_print.jpg (1024x576) [142.6 KB] || C2_TOS_Final.00768_searchweb.png (180x320) [98.7 KB] || C2_TOS_Final.00768_thm.png (80x40) [7.3 KB] || C2_TOS_Final.mp4 (1920x1080) [67.0 MB] || C2_TOS_Final.webm (1920x1080) [6.9 MB] || C2_TOS_Final.en_US.srt [1.2 KB] || C2_TOS_Final.en_US.vtt [1.2 KB] || ", "release_date": "2019-02-11T11:00:00-05:00", "update_date": "2023-05-03T13:46:08.503192-04:00", "main_image": { "id": 397477, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013100/a013146/C2_TOS_Final.00768_print.jpg", "filename": "C2_TOS_Final.00768_print.jpg", "media_type": "Image", "alt_text": "Text-on-screen video about a possible new impact crater under Greenland's ice", "width": 1024, "height": 576, "pixels": 589824 }, "main_video": null, "main_credits": { "Produced by": [ { "name": "Jefferson Beck", "employer": "USRA" } ], "Visualizations by": [ { "name": "Cindy Starr", "employer": "Global Science and Technology, Inc." } ], "Scientific consulting by": [ { "name": "Joe MacGregor", "employer": "NASA/GSFC" } ], "Written by": [ { "name": "Maria-Jose Vinas Garcia", "employer": "Telophase" } ] }, "progress": "Complete", "media_groups": [ { "id": 324294, "url": "https://svs.gsfc.nasa.gov/13146/#media_group_324294", "widget": "Video player", "title": "", "caption": "", "description": "Text-on-screen video about a possible new impact crater under Greenland's ice", "items": [ { "id": 241154, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397477, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013100/a013146/C2_TOS_Final.00768_print.jpg", "filename": "C2_TOS_Final.00768_print.jpg", "media_type": "Image", "alt_text": "Text-on-screen video about a possible new impact crater under Greenland's ice", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 241155, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 397475, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013100/a013146/C2_TOS_Final.00768_searchweb.png", "filename": "C2_TOS_Final.00768_searchweb.png", "media_type": "Image", "alt_text": "Just 114 miles from the newly-found Hiawatha impact crater under the ice of northwest Greenland, lies a possible second impact crater. 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The 22-mile wide feature would be the second crater found under an ice sheet, and if confirmed, would be the 22nd-largest crater on Earth. A NASA-led team discovered the feature using satellite data of the surface of the Greenland Ice Sheet as well as radar measurements from the airborne campaign Operation IceBridge. Although the two massive craters lie fairly close to each other, it’s thought they weren’t created at the same time. 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The Hiawatha crater is clearly visible in the topography. Farther inland another, subtler circular depression can be seen. The edge picks of this depression are shown as vertical bars, while potential central peaks are marked by orange pyramids. As we rotate around the depression, the location of the best-fit circle to the edge picks appears and that circle's center is marked with an \"X\". This circle matches well with both the edge of the bedrock depression and also the residual slope of the ice surface as it flows over this depression (not shown), strongly supporting the inference that this depression is another large impact crater.This video is also available on our YouTube channel. || C2_Crater_4k.1524_print.jpg (1024x576) [111.8 KB] || C2_Crater_4k.1524_searchweb.png (320x180) [88.0 KB] || C2_Crater_4k.1524_thm.png (80x40) [7.2 KB] || C2_Crater_4k_1080p30_low.mp4 (1920x1080) [23.1 MB] || C2_Crater_4k_1080p30.mp4 (1920x1080) [47.8 MB] || C2_Crater_4k_1080p30.webmhd.webm (1080x606) [11.6 MB] || C2_Crater_4k_2160p30_low.mp4 (3840x2160) [48.2 MB] || C2_Crater_4k_2160p30.mp4 (3840x2160) [85.9 MB] || 3840x2160_16x9_30p (3840x2160) [0 Item(s)] || captions_silent.24907.en_US.srt [43 bytes] || captions_silent.24907.en_US.vtt [56 bytes] || C2_Crater_4K_YouTube.mp4 (3840x2160) [245.6 MB] || C2_Crater_4K_ProRes.mov (3840x2160) [3.4 GB] || C2_Crater_4k_1080p30_low.mp4.hwshow [190 bytes] || ", "release_date": "2019-02-11T11:00:00-05:00", "update_date": "2025-02-02T22:39:35.896273-05:00", "main_image": { "id": 397480, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004600/a004691/C2_Crater_4k.1524_print.jpg", "filename": "C2_Crater_4k.1524_print.jpg", "media_type": "Image", "alt_text": "As this visualization draws near to the northwest coast of Greenland where the Hiawatha Glacier is located, the ice sheet is cut away to show the topography of Greenland's bedrock lying beneath the ice sheet at 20x vertical exaggeration. The Hiawatha crater is clearly visible in the topography. Farther inland another, subtler circular depression can be seen. The edge picks of this depression are shown as vertical bars, while potential central peaks are marked by orange pyramids. As we rotate around the depression, the location of the best-fit circle to the edge picks appears and that circle's center is marked with an \"X\". This circle matches well with both the edge of the bedrock depression and also the residual slope of the ice surface as it flows over this depression (not shown), strongly supporting the inference that this depression is another large impact crater.This video is also available on our YouTube channel.", "width": 1024, "height": 576, "pixels": 589824 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }