What Does a Year at Yellowstone Caldera Look Like?

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Yellowstone is one of the most active (and unjustly feared) volcanic calderas on Earth. What does the activity at Yellowstone look like on your average year?

staff carefully lay out all the ins and outs of earthquakes, ground motion, water chemistry, geyser activity and more. 2021 was a pretty average year at the caldera, so what’s that look like?A cross section of the supervolcano beneath Yellowstone illustrates the previously known magma chamber and the deeper, much larger magma reservoir discovered through new imaging techniques.These earthquakes were all pretty small, with the biggest only hitting M3.6.

One of the features that volcanologists watch at many potentially active volcanoes is how the ground level rises and falls. This can give us clues to whether magma is entering or leaving the system many miles underground. However, the up and down of the ground can also be linked to groundwater and heated fluids. Overall, much of the caldera floor continued its downward trip, sinking 1-2 inches as measured by GPS stations across the area..

 

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