The Alaska Volcano Observatory lowered the alert level at Cleveland volcano from Orange to Yellow on 6 Sep.  Since late July, no signs of eruptive activity have been registred.

The AVO raised the alert level because of  the presence of strong thermal anomaly in the crater. There are also steam-and-gas plumes observed on satellite. Color Code Orange.

Cleveland volcano had a moderate ash eruption on 28 Oct. 2006. Based on pilot reports and satellite data, AVO estimated the height of the cloud to be 20,000 ft. above sea level. 

A NASA satellite image of the volcanic ash plume over Cleveland volcano

There are new satellite photographs by NASA that show a great plume over the Cleveland volcano.

On 23 May, AVO reported that an astronaut aboard the International Space Station observed an ash plume from Cleveland at 1500. A plume was visible on satellite imagery at 1507 that drifted SW and reached a height of 6.1 km (20,000 ft) a.s.l. At 1700, an image showed the detached ash plume 130 km SW of Cleveland. The Concern Color Code was raised to Yellow. No precursory or current seismic information is available because Cleveland does not have a real-time seismic network.

Geologic Summary.

No new information about further eruptive activity or ash emissions at Cleveland Volcano since February 6 and no ash clouds have been detected in satellite imagery over the past week.

The remote Cleveland volcano erupted on the morning of 6 February 2006 at 7:57AM AKST (1657 UTC). An ash clomn was detected by statellite, rising to approximately 7 km a.s.l. (22,000 ft) and extending about 80 miles (130 kilometers) ESE of the island. The explosion appears to be an isolated event, the Alaska Volcano Observatory (AVO) reports. The concern code was originally raised to RED (highest level) and has now (7 Feb) again been lowered to YELLOW.