Dozens of structures were damaged or destroyed by a major eruption, as superheated gas currents and destructive lahars swept down the southeast flank of the Semeru volcano on November 19th. It is now two days later, and the extent of the damage which occurred is beginning to become clear. Today's video will discuss this major eruption and why it occurred through the knowledge and analysis of a geologist. Thumbnail Photo Credit: Frame grab from an afarTV video at https://www.youtube.com/watch?v=T02pJdKARLo, Used with Permission A special thanks to afarTV for granting me permission to use two of their video clips! They are linked below: [1] https://www.youtube.com/watch?v=T02pJdKARLo [2] https://www.youtube.com/watch?v=fureyDs20Bc [3] https://www.youtube.com/watch?v=Aj0W9-i4RU0 A special thanks to @homedecor on Instagram for granting me permission to use their video clip! Video link: https://www.instagram.com/reel/DRPfSmJkteu/ 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] PVMBG (Indonesia) (Pusat Vulkanologi dan Mitigasi Bencana Geologi) (Indonesia) [2] U.S. Geological Survey [3] Alaska Volcano Observatory 0:00 Pyroclastic Flow Hits Bridge 0:25 Semeru Eruption 1:39 Possible Damage Extent 3:12 Secondary Explosion Hazard 3:54 Correction 4:03 Major Eruption Cause