Scientists warn that Alaska’s Mount Spurr is showing signs of increased activity and could erupt in the coming weeks or months. An eruption could lead to widespread ashfall in Anchorage and surrounding areas,

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.

Evidence of elevated volcanic activity indicate eruption of Alaska's Mount Spurr volcano could happen within weeks or months, federal officials say.