Alert level raised at Alaska volcano

http://www.cbsnews.com/8301-201_162-57369365/alert-level-raised-at-alaska-volcano/

(AP) ANCHORAGE, Alaska - The warning level for a remote Alaska volcano has been raised after a new lava dome began forming, indicating the mountain could explode and send up an ash cloud that could threaten aircraft.

The Alaska Volcano Observatory on Tuesday elevated the alert status for Cleveland Volcano.

Officials say the new lava dome was spotted in the summit crater. The observatory says as of Monday, the dome was about 130 feet in diameter.

There have been no eruptions since Dec. 25 and Dec. 29, which destroyed the earlier lava dome built up over the fall.

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