Monthly Archives: April 2009

Colima, Mexico

During 25-29 and 31 March, white and gray plumes from Colima rose to altitudes of 3.9-4.6 km (12,800-15,100 ft) a.s.l. and occasionally drifted SW, SE, E, and NE. Source: Gobierno del Estado de Colima – “Reports provided courtesy of the … Continue reading

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Chaitén, Chile

SERNAGEOMIN reported that during 17-23 March Chaitén’s lava-dome complex continued to grow from an area that includes the central spines and part of Domo Nuevo 1. This was also the main area where collapses from unstable slopes caused block-and-ash flows. … Continue reading

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Batu Tara, Komba Island, Indonesia

Based on analysis of satellite imagery, the Darwin VAAC reported that during 25-27 March ash plumes from Batu Tara rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted about 30-110 km NW. Source: Darwin Volcanic Ash Advisory … Continue reading

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Barren Island, Andaman Islands, India

Based on analysis of satellite imagery, the Darwin VAAC reported that during 25-26 March ash plumes from Barren Island rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted about 110 km S. Source: Darwin Volcanic Ash Advisory … Continue reading

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Asama, Honshu, Japan

JMA reported weak incandescence from Asama on 23 March. Strong steam emissions were seen on 30 March by an observer in Maebashi, 50 km E. Sources: Japan Meteorological Agency (JMA), Yukio Hayakawa, personal communication – “Reports provided courtesy of the … Continue reading

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Reventador, Ecuador

The IG reported that seismicity from Reventador increased during 25-26 March. On 26 March, the seismic network detected an earthquake swarm consisting of long-period and hybrid events, interspersed with bands of harmonic tremor. Observers reported steam emissions with low ash … Continue reading

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Redoubt, Alaska, USA

On 25 March, AVO reported that a small explosion from Redoubt produced an ash plume that rose to an altitude of 4.6 km (15,000 ft) a.s.l. and drifted N to NW. Later that day AVO lowered the Volcanic Alert Level … Continue reading

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