Based on analysis of satellite imagery, the Washington VAAC reported that on 18 February ash plumes from Fuego rose to an altitude of 6.1 km (20,000 ft) a.s.l. and drifted WSW. On 20 and 24 February, INSIVUMEH reported that explosions produced ash plumes that rose to altitudes of 4.1-4.7 km (13,500-15,400 ft) a.s.l. and drifted 6-8 km SW. Some explosions produced rumbling sounds and shock waves. Incandescent material was ejected 150 m above the crater. Incandescent avalanches of blocks traveled down the W and SW flanks.
Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC) – “Report provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”