Steam spotted billowing from massive U.S. volcano as American city braces for imminent eruption | 21 April 2025 | A massive volcano in Alaska is now steaming from its summit crater, signaling more signs of unrest. Scientists have been keeping a close eye on Mount Spurr, a 11,000-foot-tall volcano that sits just 81 miles from the city of Anchorage, over the past few months due to growing signs it is ready to blow. In the Alaska Volcano Observatory's (AVO) latest update, scientists said webcam images captured over the weekend showed "continued steaming from the summit crater." "This type of steaming is typical for Mount Spurr during this current period of unrest," their statement reads. If Mount Spurr does blow, the event "would be explosive," Matt Haney, scientist-in-charge at the AVO, previously told DailyMail.com.