CENEPRED reported that multiple gas-and-steam plumes from Popocat�petl were observed during 28 November-4 December. On 1 December, high frequency seismic tremor was accompanied by an ash plume that rose to an altitude of 7.4 km (24,300 ft) a.s.l. and drifted N, and then NE. Ashfall was reported in areas downwind. Based on observations of satellite imagery, reports from the Mexico City MWO, and the web camera operated by CENEPRED, the Washington VAAC reported that the ash plume rose to an altitude of 9.1 km (30,000 ft) a.s.l.
Sources: Centro Nacional de Prevencion de Desastres (CENEPRED) , 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.”