A 2025 volcanic eruption at Mount Spurr near Anchorage is “likely” according to a new bulletin by the Alaska Volcano Observatory. The timing of the eruption and its size remain uncertain, the observatory said in a notice published Tuesday,

A volcano near Alaska’s largest city is showing new signs of unrest, with experts saying the likelihood of an eruption at Mount Spurr in the next few weeks or months has increased.

The Alaska Volcano Observatory said signs indicated a Mount Spurr eruption was likely, though not certain, in the weeks or months ahead.