Last Sunday on August 10th of 2025, Juneau was unexpectedly struck by tsunami. Despite its very small size, it originated at a far more substantial initial height nearly 60 miles away as a result of one of Alaska's largest landslides in decades. Today's video will discuss this landslide, why it was detected by seismic sensors, and why the earthquake occurred through the perspective of a geologist. Thumbnail Photo Credit: This work "Juneau1", is a derivative of a photo (resized, cropped, increased image brightness, increased image white point adjustment, increased image color saturation, text overlay, overlaid with GeologyHub made graphics (the image border & the GeologyHub logo)) from "Juneau", by: Jay Galvin, jay galvin, jaygalvin, 2010, Posted on Flickr, Flickr account link: https://www.flickr.com/photos/jaygalvin/, Photo link: https://www.flickr.com/photos/jaygalvin/5002401005/, CC BY 2.0. "Juneau1" is used & licensed under CC BY 2.0 by Youtube.com/GeologyHub 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 Sources/Citations: [1] U.S. Geological Survey [2] NOAA [3] Alaska Volcano Obervatory [4] Alaska Division of Geological & Geophysical Surveys 0:00 Juneau Tsunami 0:43 Tracy Arm Landslide 1:22 Seismic Waves 3:23 Glacial Retreat 4:03 Landslide Cause