Pagan volcano (Mariana Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 9 May-15 May 2012 (Continuing Activity)

According to NASA's Earth Observatory, a satellite image of Pagan acquired on 7 May showed a gas-and-steam plume drifting W. The plume's blue tint suggested the presence of sulfur dioxide; elevated levels of sulfur dioxide to the W of the volcano were detected in satellite images later that day. The USGS reported that minor steam-and-gas plumes were observed in partly cloudy satellite images during 4-11 May.
The Volcano 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 United States Geological Survey Volcano Hazards Program, NASA Earth Observatory
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From: Global Volcanism Program, 2012. Report on Pagan. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 9 May-15 May 2012. Smithsonian Institution and US Geological Survey.