SERNAGEOMIN reported that during an overflight of Chaitén on 3 June, the lava dome appeared more extensive and voluminous as compared to previous observations. About 2500 hectares (6,200 acres) of forest on the N and NE flanks of the volcano were burned by pyroclastic flows or lateral explosions. During 3-10 June ash-and-steam plumes rose to a maximum altitude of 3 km (10,000 ft) a.s.l. and drifted SE. Abundant steam plumes were noted. The Alert Level remained at Red.
Based on observations of satellite imagery, SIGMET reports, and pilot observations, the Buenos Aires VAAC reported that during 4-9 June continuous ash plumes rose to altitudes of 1.8-7.3 km (6,000-24,000 ft) a.s.l. and drifted NNE, NE, E, and ESE. According to a news article, commercial flights continued to be disrupted in multiple areas.
Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Buenos Aires Volcanic Ash Advisory Center (VAAC), Diario EL CHUBUT – “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”