When Yellowstone Last Woke Up

Yellowstone's last caldera-forming eruption was 631,000 years ago, and its last lava flow about 70,000 years ago. This is not a doomsday simulation: we read the evidence in the rock, from the three great eruptions and the rhinos buried in Nebraska ash to the 2024 Biscuit Basin steam blast, and what the USGS Yellowstone Volcano Observatory actually expects next. Chapters: 00:00 The Crater Nobody Could See 01:05 The Promise 01:44 A Park That Breathes 03:55 Reading the Crater 07:35 The First Waking 10:46 The Waterhole 14:43 The Trail of Fire 17:44 The Last Great Waking 20:52 The Quiet Wakings 24:48 What Happens Next 28:39 The Ledger in the Rock Sources: USGS Yellowstone Volcano Observatory (eruption history, FAQs, Caldera Chronicles) Matthews et al. 2015, G-cubed 16 (Lava Creek age) Wilson et al. 2018, Bull. Volcanol. 80:53 Huang et al. 2015, Science 348:773 Bennington et al. 2025, Nature 637:97 Knott et al. 2020, Geology 48:934 Smith et al. 2018, PLoS ONE 13:e0207103 Morgan et al. 2022, GSA Bulletin (Yellowstone Lake) Univ. of Nebraska State Museum, Ashfall Fossil Beds Smithsonian Magazine, Ashfall Fossil Beds USGS/NPS, Biscuit Basin explosion 2024 Images (Wikimedia Commons; author, title; licence deeds at creativecommons.org/licenses; cropped, scaled and panned): Public domain: NPS, USGS and NASA photographs, and 19th-century artworks and photographs (Moran, Jackson) via Wikimedia Commons. Maps, diagrams and illustrations: our own (maps from Natural Earth public-domain data); schematics are labelled. CC BY 2.0: James St. John, "Fumarole in the Fountain Group (21…"; James St. John, "1959 Hebgen Lake Earthquake fault…"; James St. John, "Hydrothermally-altered rhyolitic a…"; James St. John, "Cougar Point Welded Ash-Flow Tuff…"; Paxson Woelber, "Valley of Ten Thousand Smokes. Kat…"; Brenton Cooper from North, "Upper Mesa Falls - Idaho"; Ray Bouknight, "Natural History Museum of LA Teleo…"; Carl Malamud, "Ashfall fossil beds - Baby rhino "…"; James St. John, "Ashfall Fossil Beds (Nebraska USA)…"; Craters of the Moon, "The lava's edge"; James St. John, "Pahoehoe lava (Carey Flow Upper Pl…"; BLMIdaho, "Craters of the Moon National Monum…"; James St. John, "Columnar-jointed rhyolitic obsidia…"; James St. John, "Shoreline of Mary Bay (Yellowstone…"; James St. John, "Indian Pond (hydrothermal explosio…" CC BY 3.0: Nkansah Rexford, "Iziko Mineral Zircon (cropped)" CC BY 4.0: Boris Lobastov, "Zircon on сlinochlore SEM image"; John J. Hains, "Lower Falls and Grand Canyon of th…" CC BY-SA 3.0: Daniel Mayer, "Welded tuff at Golden Gate in Yell…"; Heidi Soosalu, "Seismometer-iceland"; Z22, "Seismogram at Weston Observatory"; Ryan Peters, "Corn fields in Southern Nebraska" CC BY-SA 4.0: Frank Schulenburg, "Mammoth Terraces"; Petr Brož, "Seismogram on historical seismomet…"; Dietmar Rabich, "Yellowstone National Park (WY USA)…"; Acroterion, "Porcelain Basin Norris YNP2"; Acroterion, "National Park Mountain Yellowstone…"; Rhododendrites, "Mount Everts Yellowstone (95874p)"; Dschwen, "Upper Mesa Falls 1"; Frank Schulenburg, "Shoshone Falls Idaho"; Acroterion, "Obsidian Cliff YNP1"; Anusia1984, "Widok na Wyżynę Pitchstone" Narration: this video uses an AI-generated synthetic voice (Kokoro open-source TTS, stock voice; not a clone of any real person). Script researched, written and fact-checked against the published sources listed above. #Yellowstone #Geology #DeepTime