The lava dome in the summit crater continues to grow slowly and more eruptions are likely.
AVO writes: "As long as the volcano remains active, additional explosions are likely. Some may produce ash clouds exceeding 20,000 feet above sea level. These clouds may go undetected in satellite imagery for hours. If a large ash-producing event occurs, seismic, infrasound, or volcanic lightning would likely be detected by local and regional monitoring networks. There is no real-time seismic monitoring network on Cleveland volcano." [less]

It is common to have earthquake swarms in the vicinity of Iliamna, which are usually caused by magmatic intrusion at depth. The ongoing activity is being closely monitored by AVO seismologists. AVO for now has not raised the alert status, which officially remains at "green".
Similar swarms have last occurred in 1996-97, and there was no eruption then. [less]

A possible ash cloud about 39 km (24 mi) NE of the volcano, likely from weak explosive activity, was detected on satellite imagery, and volcanic tremor was detected under the volcano from 15:23-15:27 UTC (6:23 AM AKST) on 18 February, followed by numerous small events for about an hour at Kanaga Volcano.
AVO has placed the volcano at Aviation Color Code YELLOW. "This new unrest indicates a possibility for sudden explosions of ash to occur at any time, and ash clouds exceeding 20,000 feet above sea level may develop. If a large, explosive, ash-producing event occurs, the local seismic network, satellite ash alarms, infrasound, and volcanic lightning will alert AVO to the new activity." [less]

The alert level is kept at orange, the second highest level.
The active lava dome is estimated to be 50 meters across. It occupies only a small portion of the approximately 200 meter summit crater. [less]

The lava dome that formed throughout the fall-winter of 2011 was largely removed by the explosive activity on 25 and 29 December, 2011. It remains possible for intermittent, sudden explosions of blocks and ash to occur at any time, and ash clouds exceeding 20,000 feet above sea level may develop. Such explosions and their associated ash clouds may go undetected in satellite imagery for hours. If a large, explosive, ash-producing event occurs, seismic, infrasound, or volcanic lightning may be detected by local and regional monitoring networks. There is no real-time seismic monitoring network on Mount Cleveland. [less]

The alert was raised to ORANGE on 29 Dec after an ash cloud, probably produced by a single explosion of Cleveland volcano, had been detected on satellite imaginary. The ash plume was found approximately 80 KM/50 miles north of the volcano and moving ESE at a height of 15,000 ft (ca. 5 km) ASL. [less]