After keeping volcanologists waiting for weeks, Mount Redoubt erupted five times in one night, beginning on March 22, 2009. The volcano followed up with more eruptions in April, and showed continued signs of unrest in early May.
Composed of visible and infrared light, this image shows a relatively calm-looking Redoubt Volcano on May 5, 2009. The only visible sign of activity is a steam plume at the summit.
A series of three images of the Earth’ limb from a Japanese weather satellite captures a dramatic view of an ash plume from Mt. Redoubt reaching the stratosphere.
In contrast to the explosive eruptions of the previous week, ash emissions from Mount Redoubt became more frequent but confined to lower altitudes on March 30, 2009. The commercial satellite GeoEye-1 captured a high-resolution view of the volcano the same day.
On March 26, 2009, Redoubt Volcano sent a column of ash some 19,800 meters (65,000 feet) above sea level, and sent a lahar through the Drift River Valley.
This satellite image shows volcanic features on the summit of Redoubt Volcano, Alaska. Scientists believe an eruption at the volcano is likely in the coming weeks and months.