On Saturday, the Alaska Volcano Observatory issued an Orange Alert for Cleveland volcano, due to a small ash cloud detected on satellites.
The ash cloud was last observed around 60 miles south of Dutch Harbor at 6:43 p.m. on Saturday. The Alaska Volcano Observatory has analyzed infrasound date which suggests that a small explosion most likely occurred at 11:25 a.m. on Saturday. So far this week, this is the only activity that has been seen from the oft-erupting volcano.
The Cleveland volcano forms the western half of the remote and uninhabited Chuginadak Island, located in the east central Aleutians. Its last explosion on August 19 left it in elevated status for over a week.
Now, the Cleveland volcano is finishing up its third day in Orange Alert.
As of Monday afternoon, no activity had been observed for 24 hours. However, the Alaska Volcano Observatory notes that "sudden explosions of blocks and ash remain possible with little or no warning … Ash clouds, if produced, could exceed 20,000 feet above sea level."
The Volcano Observatory lists Cleveland's most significant eruption as occurring in Feb. 2001, when it shot ash clouds 39,000 feet into the air during three separate explosions.