Mount Spurr, the highest volcano of the Aleutian Arc, is a large stratocone constructed at the center of a roughly 5-kilometer-wide (3.1 mi) horseshoe-shaped caldera that is open to the south. The volcano lies 81 miles (130 km) west of Anchorage and northeast of Chakachamna Lake.

Feb 6, 2025 · Mount Spurr is monitored by a local seismic network, GNSS ground deformation stations, infrasound sensors, and a webcam. Remote sensing data, including satellite imagery of surface changes and ash and gas emissions, regional infrasound sensors, and lightning data are also used to detect unrest and eruptions at the volcano.

Mount Spurr is a prominent member of the Cook Inlet volcanoes and is clearly visible from Anchorage on sunny days. The dramatic edifice is made up of several volcanic features.

1 day ago · Signs of unrest at Mount Spurr -- located in the Aleutian Arc in southern Alaska about 75 miles west of Anchorage -- have increased over the past 10 months, according to volcanologists at the U.S ...

1 day ago · Mount Spurr, an 11,070-foot-tall stratovolcano roughly 75 miles from Anchorage, has been experiencing earthquakes since last April—a phenomenon that researchers call “volcanic unrest.”

2 days ago · Mount Spurr, an Alaskan volcano shuddering with small earthquakes for 10 months, could erupt soon. The Alaska Volcano Observatory (AVO) stated on February 7 that an eruption would "most likely ...

4 days ago · For humans, the main impact of Mount Spurr's eruption would likely be ash. In 1992, the eruption at Crater Peak shut down Anchorage's airport and dusted the city with 0.1 inches (3 millimeters) of ...

Feb 8, 2025 · Mount Spurr’s summit crater is seen from the air on March 7, 2023. Escaping gas from one of the volcano’s main fumarole and a dry crater floor can be seen. (Taryn Lopez/Alaska Volcano Observatory)

A map of Mount Spurr, Alaska, showing monitoring stations operated by the Alaska Volcano Observatory and hypocenters of earthquakes that occurred from January 1, 2024 through February 6, 2025. Mount Spurr is about 75 miles (120 km) west of Anchorage. The seismic activity shown on the map is higher than normal and likely reflects intrusion of ...

Dec 6, 2024 · Mount Spurr, located on the Volcanic Ring of Fire, is one of 53 volcanoes in Alaska that have been active within the last 250 years. An increase in the number of earthquakes under a volcano near Alaska’s largest city this year has geologists paying attention.