Mount Spurr, the highest volcano of the Aleutian Arc, is a large stratocone constructed at the center of a roughly 5 km-wide horseshoe-shaped caldera that is open to the south. The volcano lies 80.87 miles west of Anchorage and NE of Chakachamna Lake.

4 days ago · 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)

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 · 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 ...

Mount Spurr forms the southern buttress of the Tordrillo Range, with an active vent on Crater Peak below the summit. This 11,070-foot volcano last erupted in September of 1992, when it dusted the region with an eighth-inch layer of volcanic ash and shut down the regular life in Alaska’s largest city for several days.

Oct 16, 2024 · The Alaska Volcano Observatory raised the alert level of Mount Spurr to yellow Wednesday, after detecting increasing seismic activity and other signs of unrest. Mount Spurr is the closest...

Oct 23, 2024 · It has been over 32 years since Mt. Spurr last erupted, but the Alaskan volcano near Anchorage is showing signs of reawakening.

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 ...

Mount Spurr is the closest volcano to Anchorage, Alaska (130 km W) and just NE of Chakachamna Lake. The summit is a large lava dome at the center of a roughly 5-km-wide amphitheater open to the south formed by a late-Pleistocene or early Holocene debris avalanche and associated pyroclastic flows that destroyed an older edifice.

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.