Volcanoes inspire awe with spectacular eruptions and incandescent rivers of lava, but often their deadliest hazard is what quietly falls from the sky.

Scientists say Mount Spurr in Alaska could potentially erupt as they detect elevated activity. NBC News' Gadi Schwartz talks ...

Nearly 300,000 Americans remain on alert as a massive volcano continues to show signs of unrest that began earlier this year.

When a large volcano erupts, as Mount Spurr appears close to doing about 80 miles from Anchorage, Alaska, it can ...