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SI/USGS Weekly Volcanic Activity Report, 21 January 2009 – 27 January 2009 29 January 2009

Posted by admin in activity reports, Alaska, Barren Island, Callaqui, Caribbean, Chaitén, Chile, Colombia, Dieng Volcanic Complex, Ecuador, eruptions, Galeras, Hawaii, Indian Ocean, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Mexico, Nevado del Huila, Nevados de Chillán, Papua New Guinea, Piton de la Fournaise, Popocatépetl, Rabaul, Redoubt, Shiveluch, Soufrière Hills, Suwanose-jima, Tungurahua, United States, volcanoes, Weekly Volcanic Activity Reports.
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SI/USGS Weekly Volcanic Activity Report 21 January 2009 - 27 January 2009

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 21 January 2009 to 27 January 2009 is now available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity: Callaqui (Chile), Dieng Volcanic Complex (Java, Indonesia), Nevados de Chillan (Chile), Redoubt (Alaska, USA).

Ongoing activity: Barren Island (Andaman Islands), Chaiten (Chile), Galeras (Colombia), Karymsky (Kamchatka, Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Kamchatka, Russia), Nevado del Huila (Colombia), Piton de la Fournaise (Reunion), Popocatepetl (Mexico), Rabaul (Papua New Guinea), Shiveluch (Kamchatka, Russia), Soufriere Hills (Montserrat), Suwanose-jima (Japan), Tungurahua (Ecuador).

NEW ACTIVITY

Callaqui (Chile): 22 Jan 09, ash plume drifted NE.

Dieng Volcanic Complex (Java, Indonesia): 22 Jan 09, field studies revealed that the phreatic eruptions of 15 Jan 09 were triggered by a landslide on that date.

Nevados de Chillán (Chile): 21 and 22 Jan 09, ash plume rose to 3.7-6.1 km a.s.l. and drifted 50-80km SE.

Redoubt (Alaska, USA): 24-25 Jan 09, marked increase in seismic activity; 25 Jan 09, tremor became sustained, increased steam and sulphur dioxide emissions observed; 26 Jan 09, elevated sulphur dioxide emissions from summit, new outflows of muddy debris from glacier downslope from the summit; 26-27 Jan 09, seismicity fluctuating but above background levels.

ONGOING ACTIVITY

Barren Island (Andaman Islands): 21 Jan 09, ash plume to 2.4km a.s.l., drifted N and NW.

Chaitén (Chile): 19 Jan 09, spine collapses on Dome 2 produced block and ash flows down SE and E flanks, and generated reddish-brown ash plumes; 21-22 Jan 09 and 25-27 Jan 09, ash plumes to 1.8-2.4 km a.s.l., drifted E and NE.

Galeras (Colombia): 21, 23-24 and 26-27 Jan 09, greyish ash plumes to 5.6km a.s.l., drifted S and W.

Karymsky (Kamchatka, Russia): 15 Jan 09, seismicity above background levels, and possible weak ash-and-gas explosions; 16-23 Jan 09, seismicity at background levels; 18-19 and 21 Jan 09, thermal anomaly in crater.

Kilauea (Hawaii, USA): 20-27 Jan 09, lava flow SE through tube to ocean; 20, 21 and 26 Jan 09, explosions at ocean entry; 26 Jan 09, lava flows observed on coastal plain; white plume from Halemaumau vent and elevated sulphur dioxide emissions throughout the period.

Kliuchevskoi (Kamchatka, Russia): 15-18 and 26-27 Jan 09, seismicity above background levels, diffuse ash-and-steam plumes noted; weak daily thermal anomaly in crater; 26 Jan 09, strombolian activity at summit crater; 26-27 Jan 09, ash plumes to 5.3km a.s.l., drifted NE and E.

Nevado del Huila (Colombia): 21 Jan 09, overflight estimated growing lava dome at 1km x 250m, estimated volume 52 million cubic metres, emitting blue-and-white gas plumes; 21 and 23 Jan 09, gas plumes to 6.3km a.s.l, drifted W.

Piton de la Fournaise (Réunion Island): 27 Jan 09, eruption that began 14 Dec 08 reported to be continuing, two active vents, incandescence observed at night and at dawn.

Popocatépetl (Mexico): 21 Jan 09, ash plume to 7km a.s.l., drifted E and NE, thermal anomaly detected; 21-27 Jan 09, emissions of steam and gas noted with occasional ash content; 22 Jan 09, small explosion produced ash plume to 7.4km a.s.l.

Rabaul (Papua New Guinea): 22-25 Jan 09, ash plumes from Tavurvur cone to 3km a.s.l., drifted NW and W; 27 Jan 09, ash plume to 4.3km a.s.l.; 23-26 Jan 09, grey ash plumes to 1.7km a.s.l., some ejection of incandescent lava fragments, ashfall to NW and SE.

Shiveluch (Kamchatka, Russia): 16-23 Jan 09, seismicity above background levels; 17 and 21 Jan 09, possible ash plumes to 5.5km a.s.l., and to 3km a.s.l. on other days within the reporting period, and gas-and-steam emissions noted; 21 Jan 09, ash plume to 4.5km a.s.l.; large daily thermal anomaly over the lava dome.

Soufrière Hills (Montserrat): 16-23 Jan 09, low seismicity, minimal rockfalls, no lava dome incandescence.

Suwanose-jima (Japan): 21 Jan 09, explosion with possible ash plume.

Tungurahua (Ecuador): 20, 23 and 25-26 Jan 09, steam-and-ash plumes to 6-7km, drifted SW and W; roaring and explosions heard; 21 and 23 Jan 09, incandescence noted at crater; 23 Jan 09, ashfall reported to SW.

ACKNOWLEDGEMENTS AND DISCLAIMER

The foregoing is a summary of the Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 21 January 2009 to 27 January 2009. It is provided for information only, and is based on but not a substitute for the full report, which comes with its own criteria and disclaimers. The map base is derived from the Smithsonian Institution/USGS/US Naval Research Laboratory This Dynamic Planet website.

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