Cleveland Weekly Update issued Jan 13, 2012 12:44 AKST Volcano Alert Level ADVISORY - Aviation Color Code YELLOW

No new activity was detected at Cleveland volcano this week. Elevated surface temperatures at the volcano's summit were observed in satellite images January 12. The elevated temperatures likely result from active fumaroles (vents of hot steam and gas) as well as from recent, still-warm deposits of ash, blocks, and lava. No lightning, airwave (infrasound) signals, or volcanic ash in satellite images were detected during this interval, indicating that the elevated temperatures were not related to volcanic explosions. AVO has received no reports of activity at the volcano from pilots or other ...

http://volcanoes.usgs.gov/activity/archive/current.php?noticeid=6923