The largest confirmed impact crater in the United Kingdom is located offshore of the city of Hull. Known as Silverpit Crater, this 2 mile or 3.2 kilometer wide structure formed during a large asteroid impact approximately 44.5 million years ago. This video will discuss this impact crater, how complex craters form, and speculate about the impacting asteroid's possible composition. Thumbnail Photo Credit: Google Earth, Data SIO, NOAA, U.S. Navy, NGA, GEBCO, Image Landsat / Copernicus, Image IBCAO. This image was overlaid with text, and then overlaid with GeologyHub made graphics (the image border & the GeologyHub logo). Estimates on asteroid diameter, velocity, tnt energy equivalent, and effects from the impact (including tsunami height generated and tsunami arrival times) in this video were sourced using the calculator at https://impact.ese.ic.ac.uk/ImpactEarth/ImpactEffects/, which was used with permission. If you would like to support this channel, consider using one of the following links: (Patreon: http://patreon.com/geologyhub) (YouTube membership: https://www.youtube.com/channel/UCYeGh5VML5XPr5jYnzh3J6g/join) (Gemstone & Mineral Etsy store: http://prospectingarizona.etsy.com) (GeologyHub Merch Etsy store: http://geologyhub.etsy.com) Google Earth imagery used in this video: ©Google & Data Providers This video is protected under "fair use". If you see an image and/or video which is your own in this video, and/or think my discussion of a scientific paper (and/or discussion/mentioning of the data/information within a scientific paper) does not fall under the fair use doctrine, and wish for it to be censored or removed, contact me by email at [email protected] and I will make the necessary changes. Various licenses used in sections of this video (not the entire video, this video as a whole does not completely fall under one of these licenses) and/or in this video's thumbnail image (and this list does not include every license used in this video and/or thumbnail image): Public Domain: https://creativecommons.org/publicdomain/mark/1.0/ CC BY 2.0: https://creativecommons.org/licenses/by/2.0/legalcode CC BY 4.0: https://creativecommons.org/licenses/by/4.0/legalcode Sources/Citations: [1] Nicholson, U., Jonge-Anderson, I.d., Gillespie, A. et al. Multiple lines of evidence for a hypervelocity impact origin for the Silverpit Crater. Nat Commun 16, 8312 (2025). https://doi.org/10.1038/s41467-025-63985-z, CC BY 4.0. Note: Many things said in today's video originate from this 1 source. Specifically, the crater's location, diameter, outer slump diameter, depth, nature as a complex crater, age, proposed asteroid impactor density, width and uplift in the crater's central peak, along with the impacting asteroid's estimated density, one graphic and one simulation originate from this scientific paper. [2] Collins, Gareth & Lynch, Elliot & McAdam, Ronan & Davison, Thomas. (2017). A numerical assessment of simple airblast models of impact airbursts. Meteoritics & Planetary Science. 52. 10.1111/maps.12873., CC BY 4.0.