Scientists from the Alaska Volcano Observatory have reported significant unrest at Mount Spurr, an 11,070-foot volcano located approximately 80 miles northwest of Anchorage, Alaska, indicating a potential eruption in the coming weeks or months,

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

Researchers predict the most likely outcome of the unrest at Mt. Spurr is “one or more explosive events” that could last as long as a few hours and produce ash clouds carried for hundreds of miles.