Lava observed
Posted by
Zephyr on 9/21/2011, 7:27 am
2011-09-20 12:56:04 - Status Report
Recent observations of Cleveland volcano show that the current eruption, characterized by effusion of lava within the summit crater continues. The size of the lava dome is now about 165 m (540 ft) in diameter compared to 150 m (490 ft) in diameter on September 9,2011. The growing lava dome remains entirely contained within the summit crater but is now approximately 20 meters below the eastern rim.
A growing lava dome in the crater increases the possibility of an explosive eruption, but does not necessarily indicate that one will occur. It is possible that explosions from the summit crater vent could produce ash clouds that may exceed 20,000 ft above sea level. These events can occur without warning and may go undetected in satellite imagery for hours. If lava dome growth continues, lava may overflow the crater rim to produce a lava flow and/or collapse to produce pyroclastic flows. Sudden collapse of the effusing lava could result in the generation of a volcanic ash cloud.
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CLEVELAND VOLCANO in ALASKA UNDER WATCH CODE ORANGE -
ArgosyTn,
9/18/2011, 10:35 pm- Lava observed - Zephyr, 9/21/2011, 7:27 am
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