According to the Alaska Volcano Observatory, satellite images show that lava has reached the edge of the crater on Cleveland Mountain in the Aleutian Islands.
Volcano monitors say if the dome continues to grow on the uninhabited mountain about 940 miles southwest of Anchorage, it could overflow the rim and increase the possibility of an explosion.
An eruption could send up an ash cloud 20,000 feet or more, the observatory warns. This could threaten aircraft.
Thanks to John Reno for this link