Redoubt Volcano, Alaska erupted first on March 22nd at 22:38 AKDT (March 23rd at 06:38 UTC). Since then, by April 5th there had been a total of 19 explosive events.
AVHRR (Advanced Very High Resolution Radiometer) false-color satellite image showing the eruption cloud from an explosion at Redoubt Volcano at 03:31am AKDT on March 23rd 2009.
Image was captured at 05:30am AKDT and shows the ash cloud passing over other volcanoes and heading NE towards Anchorage. (Image generated by Dr. John, Bailey). Image courtesy of the AVO/UAF-GI.
Please find more details at: http://www.avo.alaska.edu/activity/Redoubt.php