Large Landslide Strikes Nepal, Temporarily Dams River; Geologist Analysis

On September 27th, a large landslide struck Nepal, with many millions of tons of rock falling by up to 1,100 feet into the Kali Gandaki River below. This dammed the river for a time, but thankfully this was only temporary, with water soon flowing through the dam in a non catastrophic manner. Today's video will analyze why this September 27th 2026 landslide occurred, and how it might relate to a more than 10,000 year old prior landslide. Thumbnail Photo Credit: Dr. Richard Roscoe, Photovolcanica, Licensed Image This thumbnail image does not show the September 27th 2026 landslide in Nepal. NASA EOSDIS Worldview satellite imagery Copyright © 2012-2026 United States Government as represented by the Administrator of the National Aeronautics and Space Administration. All Rights Reserved. Associated license for NASA EOSDIS Worldview: https://github.com/nasa-gibs/worldvie... We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Observing System Data and Information System (EOSDIS). We acknowledge the use of imagery from the NASA Worldview application (https://worldview.earthdata.nasa.gov/), part of the NASA Earth Observing System Data and Information System (EOSDIS). If you would like to support this channel, consider using one of the following links: (Patreon:   / geologyhub  ) (YouTube membership:    / @geologyhub  ) (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 geologyhubyt@gmail.com 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/publicdom... CC BY 4.0: https://creativecommons.org/licenses/... Sources/Citations: [1] NASA Worldview, EOSDIS Worldview, Satellite imagery: (PACE / OCI), at https://worldview.earthdata.nasa.gov/ [2] Waltham, Tony. (2003). Very large landslides in the Himalayas. Geology Today. 12. 181-185. 10.1046/j.1365-2451.1996.00014.x. [3] Weidinger, Johannes. (2006). Predesign, failure and displacement mechanisms of large rockslides in the Annapurna Himalayas, Nepal. Engineering Geology. 83. 201-216. 10.1016/j.enggeo.2005.06.032. [4] Dhakal, Sandesh & Acharya, Mahendra & Ulak, Prakash & Pokhrel, Chhabilal & Giri, Aasish & Bhandari, Khomendra. (2024). Landslide Hazard Mapping Along the Beni-Lete Road Section, Myagdi- Mustang Districts, Western Nepal. 10.4172/2157-7617.1000772. Note: Source 4 was listed as falling under a creative commons license, but I could not figure out which creative commons license since the specific license was not seemingly listed. I am presuming it falls under the CC BY 4.0 license, but don't take my word for it, I might be incorrect. [5] U.S. Geological Survey 0:00 Nepal Landslide 2:06 Expanding Landslide 2:50 Rock Units 4:25 Rotational Landslide