Geologists monitoring Alaska's Mount Redoubt say the volcano is rumbling and emitting steam but has shown no dramatic burst of energy in the last 24 hours.

Geologist Tina Neal at the Alaska Volcano Observatory said no flyovers were planned for Sunday unless activity increased significantly.

Flyovers on Saturday found a quickly growing area of vigorous steaming at the 7,100-foot level on the north side of the mountain.

The area is just below a dome that formed the last time Redoubt erupted in 1990.

The activity adds to concerns that Redoubt is close to an eruption. An eruption in December 1989 sent an ash cloud 150 miles that flamed out the jet engines of a KLM flight carrying 231 passengers on its way to Anchorage.

(China Daily via Agencies February 3, 2009)