Anatahan, Mariana Islands, United States

Low-level tremor at Anatahan continued during 21-29 December. On 31 December, the Washington VAAC reported that a gas-and-steam plume with low ash content was visible on satellite imagery and drifted NW. The Volcanic Alert Level remained at Advisory and the Aviation Color Code remained at Yellow.

Sources: Emergency Management Office of the Commonwealth of the Mariana Islands and the US Geological Survey Hawaiian Volcano Observatory , Washington Volcanic Ash Advisory Center (VAAC) – “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”

Click here for more information on the Geology of the Mariana Islands.

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