Anatahan, Mariana Islands, United States

Low-level tremor at Anatahan continued during 14-21 December. On 14 December, the Washington VAAC reported that a steam plume was visible on satellite data.The Volcanic Alert Level remained at Advisory and the Aviation Color Code remained at Yellow.

Source: Emergency Management Office of the Commonwealth of the Mariana Islands and the US Geological Survey Hawaiian Volcano Observatory - “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”