The magnitude 7.4 earthquake which struck Japan on Monday was both unusually brief and long duration. That may sound like a complete oxymoron, but there is a key factor that led to this being true. This is why the earthquake duration was officially only 12.1 seconds, yet some areas felt more than a minute of continuous ground motion such as in Tokyo. 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 4.0: https://creativecommons.org/licenses/by/4.0/legalcode Sources/Citations: [1] Papán, D.; Brozová, E.; Papánová, Z. Experimental Simulation of Deformation Effect Propagation Due to Explosion on the Surface of a Small-Scale Model. Buildings 2023, 13, 1566. https://doi.org/10.3390/buildings13061566, CC BY 4.0. [2] U.S. Geological Survey [3] Japanese Meteorological Agency 0:00 Japan Earthquake 0:10 Earthquake Duration? 0:40 Seismic Waves 1:37 Seismic Wave Types 3:00 Earthquake Duration