Mount Spurr, which sits about 75 miles west of Anchorage, has seen “ volcanic unrest ” for the last 10 months, including an increasing number of earthquakes, according to a Feb. 6 statement from the Alaska Volcano Observatory. The unrest suggests “that an eruption is possible,” officials said.

Scientists have issued a warning that a massive volcano in Alaska is on the brink of eruption. Mount Spurr, an 11,000-foot-tall volcano on the Cook Inlet about 75 miles from Anchorage, has a 50-50 chance of spewing out hot magma and ash that could be toxic for humans to breathe,

Ten months of unrest at Mount Spurr could be a sign of an upcoming eruption from a side vent or, less likely, from the main crater.