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One of the planet's most dangerous volcanoes known as Ulawun just produced one of its most powerful eruptions in recorded history, causing several news agencies to discuss a potential tsunami threat. This not only sent a plume of ash to a height of 60,000 feet or 18.3 kilometers, but also triggered widespread pyroclastic flows that appear to have scorched several square kilometers of forest. Luckily, there was no tsunami hazard, despite the initial reports. This video will discuss why Ulawun is considered to be so dangerous, along with what might occur during the next few weeks to months. Thumbnail Photo Credit: (cropped, overlaid with text, overlaid with GeologyHub made graphics (the image border and the GeologyHub logo), frame grab from a video at 0m55s in the linked video by) Extreme Pursuit, Channel link: , Video link: Used with Permission. A special thanks to the Extreme Pursuit YouTube channel for granting me permission to use clips of his footage! Video Sources from the Extreme Pursuit YouTube channel: [1] [2] Extreme Pursuit channel link: NASA EOSDIS Worldview satellite imagery Copyright © 2012-2023 United States Government as represented by the Administrator of the National Aeronautics and Space Administration. All Rights Reserved. Associated license for NASA EOSDIS Worldview: 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 (), 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: ) (YouTube membership: ) (Gemstone & Mineral Etsy store: ) (GeologyHub Merch Etsy store: ) 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 tccatron@ 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: Public Domain: Sources/Citations: [1] Rabaul Volcano Observatory [2] NASA Worldview, EOSDIS Worldview, (Satellite imagery: Terra / MODIS, NOAA-20 / VIIRS), (Thermal signatures: Terra / MODIS, NOAA-20 / VIIRS, Aqua / MODIS), at [3] VEIs, dates/years, composition, tephra layer name, DRE estimates, and bulk tephra volume estimates for volcanic eruptions shown in this video which were assigned a VEI 4 or larger without an asterisk after their name are sourced from the LaMEVE database (British Geological Survey © UKRI), Used with Permission [4] Source of Volcanic Explosivity Index (VEI) methodology and criteria: Newhall, C. G., and Self, S. (1982), The volcanic explosivity index (VEI) an estimate of explosive magnitude for historical volcanism, J. Geophys. Res., 87(C2), 1231–1238, doi: Accessed / Read by on Oct 5th, 2022. [5] U.S. Geological Survey [6] Alaska Volcano Observatory [7] University of Alaska Fairbanks, Geophysical Institute 0:00 Ulawun Erupts 0:36 Tsunami Hazard? 1:12 Numerous Calderas 2:24 Eruption Comparisons 4:18 VEI Estimate
