Eruption fears as volcano rumbles
Mount Redoubt in southern Alaska is puffing steam and emitting volcanic gases but still hasn't erupted.
Vulcanologist Dave Schneider at the Alaska Volcano Observatory said winds and humidity made the steam more visible. The plume extended several hundred feet above the crater.
Observatory seismologist Stephanie Prejean said Redoubt's ongoing earthquakes have shifted to a higher frequency, which could mean rock is breaking.
She said the large amount of gases indicate new magma in the earth's crust.
The observatory warned in late January that an eruption was possible after earthquakes beneath Mount Redoubt increased sharply.