Anatahan, Mariana Islands, United States

The amplitude of volcanic tremor at Anatahan gradually increased through October and November and small explosions occurred during the last week of November. On 29 November, the Volcanic Alert Level was raised to Advisory and the Aviation Color Code was raised to Yellow based on the increase in seismicity.

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

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