Mount Spurr

Mount Spurr, an 11,000-foot snow- and ice-covered stratovolcano in Alaska, has recently experienced dozens of small earthquakes, raising concerns of a potential eruption. Located about 100 km west of Anchorage in the Cook Inlet region, it sits at the southern edge of a gap in the Alaska Range and is primarily composed of andesite rock. The volcano features a lava dome, a breached stratovolcano, and the Crater Peak vent. Its 5×6 km caldera, formed by a crater collapse 10,000 years ago that created Chakachamna Lake, contains an active icefield and glaciers. Mount Spurr last erupted in 1992, causing significant ashfall and disrupting air travel.