Volcanic activity at Mount Spurr in Alaska is predicted to culminate in an explosive eruption in the coming months, potentially resulting in ashfall and disruptions to aviation operations in the greater Anchorage area. The stratovolcano, located in the Aleutian volcanic arc, lies around 129 km (80 miles) west of Anchorage on the western side of the Cook Inlet.
An uptick in low-level seismic activity and snow and ice melt has been occurring at the volcano since last year, indicating magmatic movements taking place under the surface; the alert level at the volcano was raised to yellow (the second lowest-level on a four-tier scale) in October 2024. Volcanic gas emissions have also been recorded, and the latest assessments indicate this activity will more likely end in an eruptive episode, rather than simmer down as it did in 2004–2006.