Anchorage, Alaska (CNN)-- It's 3 degrees and snowing outside the Alaska Volcano Observatory in Anchorage, but inside the operations center, things are heating up. "This is kind of the nerve center ...

(CNN)-- Mount Redoubt, the Alaskan volcano expected to erupt at any time, is getting a bit more edgy. The Alaska Volcano Observatory said in a statement Friday "volcanic tremor" has increased in ...