Mount Spurr, located about 75 miles West of Anchorage, has been acting up in recent weeks, prompting officials at the U.S. Geological Survey and Alaska Volcano Observatory to issue a yellow alert. This yellow status means the volcano is exhibiting signs of "elevated unrest" compared to its usual activity, indicating that it may soon erupt.

Volcanologists at the Alaska Volcano Observatory have been monitoring volcanic unrest since April of last year.