[2] Pilots and other civilians reported two distinct and very large steam plumes coming from Fourpeaked Mountain.

[3] The Alaska Volcano Observatory upgraded Fourpeaked Mountain from the classification "not assigned" to Level of Concern Color Code Yellow on September 20, 2006.

Fourpeaked also continued to vent volcanic gases at the same rate as revealed in earlier air sampling.

A possible large steam plume was observed in several partly cloudy satellite views Thursday afternoon.

"[5] On February 18, the AVO reported a swarm of 13 small earthquakes under Fourpeaked, with the largest measuring 1.8 on the Richter magnitude scale.