On March 1st, an unusually large earthquake struck Nebraska, being felt across at least 5 states and up to 9 million people. While this was only a magnitude 4.1 quake, it was large in the context of Nebraska which isn't generally too seismically active. However, upon further investigation, it appears that this earthquake was caused by something unusual; remnants of an ancient towering mountain range which eroded away more than 1 billion years ago. Thumbnail Photo Credit: Google Earth. Image Landsat / Copernicus. This image was overlaid with text, and then overlaid with GeologyHub made graphics (the image border & the GeologyHub logo). A special thanks to the EarthquakeSim YouTube channel for granting me permission to use clips of his footage! Video Sources from the EarthquakeSim YouTube channel: [1] https://www.youtube.com/watch?v=Jy_4G7ig5Gw Subscribe to EarthquakeSim at: https://www.youtube.com/@EarthquakeSim 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/ Sources/Citations: [1] U.S. Geological Survey 0:00 Nebraska Earthquake 1:06 Fault Line Type 1:51 Ancient Buried Orogeny 3:23 Regional Seismicity 3:53 Aftershock Odds