On 26 February, it was reported that plumes rose 2 km above the complex. During 26-27 February, there was another small dome collapse. [less]

Similar future events triggering pyroclastic flows, as well as mud flows by remobilization of fresh ash by rains could occur any time and threaten what is left of the town of Chaitén.
[less]

On a flight it was seen that 9 January Domo Nuevo 1 and Domo Nuevo 2 filled up the 3-km-wide inner caldera. Activity was concentrated on the S part of Domo Nuevo 2. Argentine Airlines resumed flights into Esquel airport (about 120 km E) on 12 January, because of ash. Web camera views reported that on 10 and 12 January ash plumes continuously were rosing. [less]

Heavy rainfalls cause the Chaitén river and tributaries to transform into mud flows and overflow their natural and artificial banks. Water and mud have been destroying ever larger parts of Chaité city, which is now almost completely abandoned. [less]

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(Source: Chilenean newspapers reported through The Volcanism Blog) [less]

from Chaitén rose to an altitude of 3.1 km (10,200 ft) a.s.l. The lava
dome continued to grow, especially the E side. The Volcanic Alert [less]

Ash-Plumes rose to an altitude of 2 km a.s.l., but later that day rose to greater altitudes of 6-7 km a.s.l. The increased activity did not correspond to any significant variation in seismicity. Plumes were emitted from two areas on the E and S flanks and were different colors; the area on the E flank produced steam plumes with minor ash content and the area on the S flank emitted darker ash plumes. The plumes drifted SW and caused ashfall in Chaitén town for several hours. The ash accumulation was 1.5 cm thick. [less]

SENAGEOMIN reported from overflight observations that 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.
The area around Chaiten remains closed. Slowly the evacuated town of Chaiten is being buried under mud flows (lahars). [less]

SERNAGEOMIN reported that on 7 May, seismicity from Chaitén increased and a large explosion was registered. On 8 May small pyroclastic flows traveled E and contacted the Rayas River, possibly causing steam plumes. During a break in the cloud cover, the ash-and-gas plume, present since 2 May, was seen rising to an altitude of 15.1 km (50,000ft) a.s.l. and drifting NE. The W side of the plume was darker and denser. ONEMI (Oficina Nacional de emergencia - Ministerio del Interior) reported ashfall in multiple areas on 7, 8, and 10 May. [less]

The subplinian eruption of Chaitén volcano on May 2, 2008 followed increased seismicity in the region the day before. A pulsating white to gray ash plume rose to an estimated altitude greater than 21 km (68,900 ft) a.s.l. and drifted SSE. The Alert Level was raised to Red.
Based on observations of satellite imagery and pilot reports, the Buenos Aires VAAC reported an ash plume at altitudes of 13.7-16.8 km (45,000-55,000 ft) a.s.l. drifted NE. According to news articles, Chile's government declared a state of emergency on 2 May and several hundred people were evacuated from the town of Chaitén (10 km SE). The eruption was initially thought to have been from Minchinmávida, about 17 km ENE, which last erupted in 1835. [less]