On Friday, millions of people in Japan received an alert that a M9.9 earthquake had just struck. While this was thankfully given in error, the reason it happened is that a still large earthquake did strike Russia's Kamchatka peninsula at that time. Registering in as a magnitude 6.9 earthquake, it was an interesting intraslab seismic event which struck on October 16th, 2026. Thumbnail Photo Credit: Google Earth, Image Landsat / Copernicus, Data SIO, NOAA, U.S. Navy, NGA, GEBCO, Image IBCAO. 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 Estimates on asteroid diameter, velocity, tnt energy equivalent, frequency of a similar magnitude asteroid/comet impact event, and effects from the impact (including earthquake magnitude generated and wind speeds generated) 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 4.0: https://creativecommons.org/licenses/by/4.0/legalcode Sources/Citations: [1] U.S. Geological Survey [2] Belle Philibosian, Aron J. Meltzner, Segmentation and supercycles: A catalog of earthquake rupture patterns from the Sumatran Sunda Megathrust and other well-studied faults worldwide, Quaternary Science Reviews, Volume 241, 2020, 106390, ISSN 0277-3791, https://doi.org/10.1016/j.quascirev.2020.106390. (https://www.sciencedirect.com/science/article/pii/S0277379120303528), CC BY 4.0. [3] G. Collins & others, "A numerical assessment of simple airblast models of impact...", Meteoritics & Planetary Science, https://doi.org/10.1111/maps.12873 (2017), CC BY 4.0 0:00 M9.9 Alert, False Alarm 0:24 M6.9 Russia Earthquake 1:17 Aftershock of 2025? 2:05 Geologic Setting 2:57 Largest Possible EQ (Opinion) 3:33 The Only Way a M9.9 Could Strike