For this month's video update of the Yellowstone Volcano Observatory, we'd like to introduce you to a friend of ours. This friend has been monitoring changes of the ground surface in Yellowstone for decades and is so good that it can detect movement of just a few millimeters in magnitude (just a fraction of an inch). The friend? A continuous GPS station! There are dozens of continuous GPS stations throughout the Yellowstone region, and they show us that the ground in Yellowstone is always changi

Yellowstone Volcano Observatory monthly update July 1, 2025, 10:27 a.m. MDT https://ow.ly/NmoN50WjbVj SUMMARY Yellowstone Caldera activity remains at background levels, with 60 located earthquakes in June (largest = M2.7). Deformation measurements indicate that the annual summertime pause in long-term caldera subsidence started in June. Another small eruption of Black Diamond Pool in Biscuit Basin was recorded by a webcam on June 12 at 6:25 a.m. MDT (see attached video). RECENT WORK AND NEWS Min

Yellowstone Volcano Observatory Scientist-in-Charge Mike Poland presents the top five headlines for 2023. Thank you to our colleagues at USGS Volcanoes for the latest monthly update! | Yellowstone National Park

Geologists are finding evidence for what caused the July 23 hydrothermal explosion in Biscuit Basin. The month of August also marks the 65th anniversary of the magnitude 7.3 Hebgen Lake earthquake that occurred Aug. 17, 1959, which caused a devastating landslide that killed 28 people and created the lake that we know today as “Quake Lake.” Learn more about these events, along with an overview of other geologic activity during the month of August in this monthly update from our friends at USGS Vo