An ongoing shallow intrusion of magma is likely ongoing at a United States volcano which may not have erupted in more than 10,000 years. What I am referring to is the Kupreanof volcano, which just had its alert level raised to yellow. Magma is suspected to be at under 3.1 miles or 5 kilometers depth, but whether or not this leads to an eruption is uncertain. Thumbnail Photo Credit: Dietterich, Hannah, Alaska Volcano Observatory / U.S. Geological Survey, https://avo.alaska.edu/image/view/197204. This image was overlaid with text, and then overlaid with GeologyHub made graphics (the image border & the GeologyHub logo). 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] U.S. Geological Survey [2] Alaska Volcano Observatory [3] University of Alaska Fairbanks, Geophysical Institute [4] Alaska Division of Geological & Geophysical Surveys [5] Wilson, F. H., 1989, Geologic setting, petrology, and age of Pliocene to Holocene volcanoes of the Stepovak Bay area, western Alaska Peninsula: in Dover, J. H. and Galloway, J. P., (eds.), Geological studies in Alaska by the U.S. Geological Survey, 1988, U.S. Geological Survey Bulletin 1903, p. 84-95. [6] J. Ewert, A. Diefenbach, D. Ramsey, "2018 Update to the U.S. Geological Survey National Volcanic Threat Assessment", U.S. Geological Survey, Accessed October 22, 2022. https://pubs.usgs.gov/sir/2018/5140/sir20185140.pdf 0:00 Ongoing Magma Intrusion 0:43 Kupreanof Volcano 1:16 Sulfur Dioxide 1:53 Seismic Data 3:47 Threat Score 4:16 The Last Eruption Debate