Alaska's Mount Redoubt volcano Monday, March 30, 2009, as it emits a steady ash plume. The volcano 100 miles southwest of Anchorage has erupted 18 times since March 22, sending ash in various directions. A light dusting of ash fell for the first time on Anchorage on Saturday.
A Webcam image of Mount Redoubt Monday, March 23, 2009, near Kenai, Alaska. The Mount Redoubt volcano erupted six times Sunday night and early Monday morning, March 22 and 23, 2009, sending an ash plume more than 9 miles into the air in the volcano's first emissions in nearly 20 years.
The Redoubt volcano ash plumes are seen from the terra spacecraft Monday, March 23, 2009. The lower, circular plume is next to the volcano while the elongated plume is drifting north.
Ash from the Redoubt volcano obscures the lower slopes of Mt. Susitna Monday, March 23, 2009. The city of Anchorage is in the foreground. Ash coated communities throughout the Susitna Valley.
Massive flooding in Drift Valley from the eruption of Mount Redoubt volcano on the west side of Cook Inlet on Monday, March 23, 2009, across from Kenai, Alaska.
Ash from Mount Redoubt Volcano obscures a view of Mt. McKinley from Talkeetna, Alaska, Monday, March 23, 2009.
Karen Timmers, right, picks up her daughter Kaila Kais, who suffers from asthma, and son Johann from Talkeetna Elementary School, in Talkeetna, Alaska, on Monday, March 23, 2009, because of the ash from Mount Redoubt Volcano. Footprints in the ash are seen in the foreground.
Ray Alby restocks dust masks at the Alaska Industrial Hardware Store in Anchorage, Alaska, Monday, March 23, 2009. People were buying masks to combat ash from Mount Redoubt Volcano.
Steam rises from the top vent in the summit crater of Alaska's Mount Redoubt, Saturday, March 21, 2009.
John Power, a geophysicist with the U.S. Geological Survey Alaska Volcano Observatory shows on a satellite image the eruption of Mount Redoubt, green and purple spot on map, during a news conference in Anchorage, Alaska, Monday, March 23, 2009.
This March 15, 2009, photo shows Mount Redoubt looking south at the north flank near Kenai, Alaska.
Steam and gas rise from a large fumerole on the north flank of Mount Redoubt, the 10,197-foot volcano in the Chigmit Mountains, in Alaska, Jan. 27, 2009.
Bill Post, a pilot for Talkeetna Air Taxi, sweeps ash from the Mount Redoubt Volcano off a DeHavilland Otter plane in Talkeetna, Alaska, Monday, March 23, 2009.