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SI/USGS Weekly Volcanic Activity Report, 29 December 2010 – 4 January 2011 8 January 2011

Posted by admin in activity reports, Bezymianny, Bulusan, Caribbean, Colombia, Ecuador, eruptions, Etna, Fuego, Gaua, Guatemala, Hawaii, Indonesia, Italy, Japan, Kamchatka, Karymsky, Kilauea, Kizimen, Machín, Manam, Pacific, Papua New Guinea, Philippines, Russia, Sakura-jima, Santa María, Shiveluch, Soufrière Hills, Stromboli, Suwanose-jima, Tengger Caldera, Tungurahua, United States, Vanuatu, Weekly Volcanic Activity Reports.
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The Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Reports enter their second decade of chronicling what the world’s volcanoes are up to with this week’s report, which covers 29 December 2010 to 4 January 2011 and is compiled by Sally Kuhn Sennert. Some selected highlights:

  • Etna: light ashfall, incandescence, vigorous strombolian activity
  • Manam: new eruptive episode – ash plumes, some dense; incandescence; pyroclastic flows
  • Stromboli: increase in the frequency and intensity of explosions from the S1 vent
  • Machín: increase in low-magnitude volcanic-tectonic seismicity recorded

SI/USGS Weekly Volcanic Activity Report 29 December 2010 - 4 January 2011

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 29 December 2010 – 4 January 2011 is now available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Etna (Italy), Kizimen (Russia), Manam (Papua New Guinea), Stromboli (Italy).

Ongoing activity: Bezymianny (Russia), Bulusan (Philippines), Fuego (Guatemala), Gaua (Vanuatu), Karymsky (Russia), Kilauea (Hawaii, USA), Machín (Colombia), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan), Tengger Caldera (Indonesia), Tungurahua (Ecuador).

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SI/USGS Weekly Volcanic Activity Report 16-22 June 2010 24 June 2010

Posted by admin in activity reports, Batu Tara, Caribbean, Colombia, Dukono, Ecuador, eruptions, Etna, Gaua, Gorely, Guatemala, Hawaii, Indonesia, Ioto, Italy, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Nevado del Huila, Pacaya, Papua New Guinea, Russia, Sakura-jima, Shiveluch, Soufrière Hills, Tiatia, Tungurahua, Ulawun, United States, Vanuatu, Weekly Volcanic Activity Reports.
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Some highlights from the last week of volcanic activity reported by the Global Volcanism Program:

  • Etna: hot landslides generate ash clouds
  • Nevado del Huila: seismicity increases, sulphur dioxide plumes detected
  • Tungurahua: steam-and-ash plumes, daily ashfall
  • Kliuchevskoi: strombolian activity
  • Sakura-jima: 550 eruptions so far in 2010, a new record for this hyper-active volcano

SI/USGS Weekly Volcanic Activity Report 16-22 June 2010

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 16-22 June 2010 is now available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Etna (Italy), Gorely (Russia), Ioto (Japan), Nevado del Huila (Colombia), Pacaya (Guatemala), Tiatia (Russia), Tungurahua (Ecuador), Ulawun (Papua New Guinea).

Ongoing activity: Batu Tara (Indonesia), Dukono (Indonesia), Gaua (Vanuatu), Karymsky (Russia), Kilauea (Hawaii USA), Kliuchevskoi (Russia), Sakura-jima (Japan), Shiveluch (Russia), Soufrière Hills (Montserrat).

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SI/USGS Weekly Volcanic Activity Report 9-15 June 2010 22 June 2010

Posted by admin in activity reports, Alaska, Bagana, Batu Tara, Bezymianny, Caribbean, Chile, Cleveland, Dukono, Ecuador, eruptions, Eyjafjöll, Fuego, Gaua, Guatemala, Hawaii, Iceland, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Melimoyu, Mexico, Nicaragua, Pacific, Papua New Guinea, Popocatépetl, Russia, Sakura-jima, San Cristóbal, Shiveluch, Soufrière Hills, Tungurahua, Ulawun, United States, Vanuatu, Weekly Volcanic Activity Reports.
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Some highlights from the last week of volcanic activity reported by the Global Volcanism Program:

  • Melimoyu: increased seismicity leads to heightened alert level
  • Tungurahua: daily explosions and ashfall
  • Eyjafjallajökull: earthquakes, steam plumes
  • Soufrière Hills: rockfalls and pyroclastic flows

SI/USGS Weekly Volcanic Activity Report 9-15 June 2010

Click on the map for a larger version (1280 x 898 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 9-15 June 2010 is now available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Bezymianny (Russia), Cleveland (Alaska, USA), Melimoyu (Chile), Pacaya (Guatemala), San Cristóbal (Nicaragua), Sarigan (Mariana Islands), Tiatia (Russia), Tungurahua (Ecuador), Ulawun (Papua New Guinea).

Ongoing activity: Bagana (Papua New Guinea), Batu Tara (Indonesia), Dukono (Indonesia), Eyjafjallajökull (Iceland), Fuego (Guatemala), Gaua (Vanuatu), Karymsky (Russia), Kilauea (Hawaii USA), Kliuchevskoi (Russia), Popocatépetl (Mexico), Sakura-jima (Japan), Shiveluch (Russia), Soufrière Hills (Montserrat).

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Continuing Gaua activity at the NASA Earth Observatory 27 April 2010

Posted by admin in activity reports, eruptions, Gaua, NASA Earth Observatory, Pacific, Vanuatu, volcanoes.
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Eruption of Gaua Volcano, 24 April 2010 (NASA ALI/EO-1 image)

As reported here last week, activity is continuing at Gaua volcano in Vanuatu, with the government planning for evacuations of Gaua Island. The NASA Earth Observatory has been providing some excellent satellite imagery of Gaua, most recently the above image, captured on 24 April 2010 by the Advanced Land Imager aboard NASA’s Earth Observing-1 (EO-1) satellite. The brown areas on the left of the image, to the west and south-west of the volcano, show where volcanic emissions and ashfall have damaged and killed vegetation.

The world is paying little attention to the activity at Gaua, but it is shaping up to be a very nasty, hazardous and disruptive eruption. Ashfall, poisonous gases, volcanic bombs and mudflows are being produced by the active cone, Mount Garet, and emissions are tainting local crops and water supplies. Rising water levels in the crater have been reported, increasing the risk of still more dangerous mudflows. The population of Gaua has already had to abandon the western side of the island and seek refuge in the east, away from the worst of the volcano’s ash and fumes, but as the activity increases they may have to evacuate completely. Radio Australia News quotes Vanuatu Geohazards Technical Advisor: ‘The current risk is mainly ash falls and then mudflows. It’s true that we have an increase in activity but not like a level 3. Evacuation is ready the plan is ready the location is ready, it’s a very tough situation for the local population of Gaua, they’re scared they’re afraid, it’s a very new situation for them’.

The alert level for Gaua is still at level 2, according to the Vanuatu Geohazards Observatory.

For all our coverage of Gaua: Gaua « The Volcanism Blog.

News
Vanuatu volcano may force evacuationsSydney Morning Herald, 20 April 2010
Vanuatu volcano taints water suppliesSydney Morning Herald, 21 April 2010
Vanuatu authorities monitor Gaua volcano – Radio Australia News, 23 April 2010
South Seas volcano threatens thousands – Earthweek, 23 April 2010

Information
Global Volcanism Program: Gaua – summary information for Gaua (0507-02=)
Vanuatu volcanoes and volcanics – information from the USGS Cascades Volcano Observatory
Vanuatu Geohazards Observatory – home page for geohazards monitoring in Vanuatu

The Volcanism Blog

Evacuations planned in Vanuatu as Gaua activity steps up 19 April 2010

Posted by admin in activity reports, eruptions, Gaua, Pacific, Vanuatu.
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Gaua volcano, Vanuatu, 12 April 2010 (NASA Terra MODIS image)
Gaua volcano, Vanuatu: a MODIS image from the NASA Terra satellite, 12 April 2010 (source: NASA Earth Observatory, 15 April 2010).

Gaua volcano in northern Vanuatu has been showing signs of increased activity for some months: in November 2009 there were evacuations of villagers from Gaua island because of ashfall and gas emissions. During January 2010 ash emissions became denser and darker, and gas emissions increased. Strombolian activity and explosions were reported at the end of January. From late March into April ash plumes were reported daily, reaching altitudes of up to 3 km, and reports of explosions, ash fall and the ejection of volcanic bombs continued.

Gaua volcano, Vanuatu, 14 February 2010 (NASA EO-1 ALI image)
The Mount Garet cone of Gaua volcano erupting on 14 February 2010, captured by the Advanced Land Imager aboard NASA’s Earth Observing-1 satellite. The crescent-shaped body of water is Lake Letas, which partially fills the Gaua caldera (source: NASA Earth Observatory, 18 February 2010).

Today news sources are reporting that extensive evacuations are being planned, involving the transfer of about 2700 people from Gaua or Santa Maria Island to a relocation centre on nearby Vanualava Island. According to Peter Korisa of the Vanuatu Government emergencies office the volcano’s activity is not stable, but increasing: ‘Last year it was just some explosions and some ash falling but at the moment the activity is becoming more interesting’. The evacuation is not yet being carried out, but the necessary plans have been made. At the moment, Korisa says, ‘the situation doesn’t warrant any evacuation’, but the authorities are ready to act should such a step prove necessary.

The alert level for Gaua remains at its habitual level 2, according to the Vanuatu Geohazards Observatory.

UPDATE 20 April 2010. A reader has correctly pointed out that the previous headline for this post, ‘Evacuations in Vanuatu as Gaua activity steps up’, gave the impression that the evacuations are already under way. This is not the case, the evacuations are only at the planning stage, and I have changed the headline to reflect the situation accurately. Thanks, TJ, for the correction.

For all our coverage of Gaua: Gaua « The Volcanism Blog.

News
Vanuatu prepares evacuation from rumbling volcano – AFP, 19 April 2010
Vanuatu prepares evacuation amid threats of Gaua volcano – Radio New Zealand International, 19 April 2010

Information
Global Volcanism Program: Gaua – summary information for Gaua (0507-02=)
Vanuatu volcanoes and volcanics – information from the USGS Cascades Volcano Observatory

The Volcanism Blog

SI/USGS Weekly Volcanic Activity Report 27 January-2 February 2010 4 February 2010

Posted by admin in activity reports, Africa, Caribbean, Congo (Dem. Rep.), Ecuador, eruptions, Gaua, Hawaii, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Mexico, Nyamuragira, Nyiragongo, Pacific, Popocatépetl, Russia, Sakura-jima, Sangay, Shiveluch, Soufrière Hills, Suwanose-jima, Tungurahua, United States, Vanuatu, Weekly Volcanic Activity Reports.
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Some of the volcanic activity headlines this week:

  • Nyiragongo: probable lava lake activity producing thermal anomalies
  • Tungurahua: roars, rumbles, explosions, lava fountains
  • Gaua: activity intensified, explosions, dark ash plumes, strombolian activity

SI/USGS Weekly Volcanic Activity Report 27 January-2 February 2010

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 27 January-2 February 2010 is available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Nyiragongo (Democratic Republic of Congo), Tungurahua (Ecuador).

Ongoing activity: Gaua (Vanuatu), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Nyamuragira (Democratic Republic of Congo), Popocatépetl (Mexico), Sakura-jima (Japan), Sangay (Ecuador), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan).

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SI/USGS Weekly Volcanic Activity Report 20-26 January 2010 28 January 2010

Posted by admin in activity reports, Barren Island, Batu Tara, Caribbean, Chaitén, Chile, Ecuador, eruptions, Fuego, Gaua, Guatemala, Hawaii, Indian Ocean, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Llaima, Pacific, Russia, Sakura-jima, Santa María, Shiveluch, Soufrière Hills, Suwanose-jima, Tungurahua, United States, Vanuatu, Weekly Volcanic Activity Reports.
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Some of the volcanic activity headlines this week:

  • Soufrière Hills: cycles of vigorous activity – ash venting, rockfalls, pyroclastic flows
  • Tungurahua: explosions, loud roars and rumbles, frequent ashfall
  • Kliuchevskoi: strombolian activity, phreatic explosions producing plumes up to 8 km a.s.l.

SI/USGS Weekly Volcanic Activity Report 20-26 January 2010

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 20-26 January 2010 is available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Soufrière Hills (Montserrat), Tungurahua (Ecuador).

Ongoing activity: Barren Island (India), Batu Tara (Indonesia), Chaitén (Chile), Fuego (Guatemala), Gaua (Vanuatu), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Llaima (Chile), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Suwanose-jima (Japan).

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SI/USGS Weekly Volcanic Activity Report 13-19 January 2010 21 January 2010

Posted by admin in activity reports, Africa, Arenal, Caribbean, Chaitén, Chile, Congo (Dem. Rep.), Costa Rica, Ecuador, eruptions, Gaua, Hawaii, Japan, Kamchatka, Karymsky, Kharimkotan, Kilauea, Kliuchevskoi, Nyamuragira, Papua New Guinea, Planchón-Peteroa, Rabaul, Russia, Sakura-jima, Sangay, Shiveluch, Soufrière Hills, Suwanose-jima, Tungurahua, Turrialba, United States, Vanuatu, Weekly Volcanic Activity Reports.
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Some of the volcanic activity headlines this week:

  • Kharimkotan: Kuril volcano shows a thermal anomaly
  • Soufrière Hills: activity ramps up with 5.5-7.6 km ash plumes
  • Tungurahua: big explosions rattle windows
  • Arenal: strombolian eruptions from Arenal’s crater C

SI/USGS Weekly Volcanic Activity Report 13-19 January 2010

Click on the map for a larger version (1280 x 898 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 13-19 January 2010 is available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Kharimkotan (Russia), Nyamuragira (Democratic Republic of Congo), Soufrière Hills (Montserrat), Tungurahua (Ecuador), Turrialba (Costa Rica).

Ongoing activity: Arenal (Costa Rica), Chaitén (Chile), Gaua (Vanuatu), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Planchón-Peteroa (Chile), Rabaul (Papua New Guinea), Sakura-jima (Japan), Sangay (Ecuador), Shiveluch (Russia), Suwanose-jima (Japan).

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SI/USGS Weekly Volcanic Activity Report 16-22 December 2009 23 December 2009

Posted by admin in activity reports, Alaska, Bezymianny, Caribbean, Chaitén, Chile, Cleveland, Ecuador, eruptions, Gaua, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Mayon, Pacific, Russia, Sakura-jima, San Cristóbal, Shiveluch, Soufrière Hills, Suwanose-jima, United States, Vanuatu, Weekly Volcanic Activity Reports.
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SI/USGS Weekly Volcanic Activity Report 16-22 December 2009

Click on the map for a larger version (1280 x 898 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 16-22 December 2009 is available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Bezymianny (Russia), Cleveland (Alaska, USA), Gaua (Vanuatu), Mayon (Philippines), San Cristóbal (Nicaragua).

Ongoing activity: Chaitén (Chile), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Sakura-jima (Japan), Sangay (Ecuador), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan).

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Vanuatu’s volcanoes at the NASA Earth Observatory 9 December 2009

Posted by admin in Ambrym, Gaua, NASA Earth Observatory, Pacific, Vanuatu.
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Vanuatu, showing Gaua and Ambrym volcanoes, 3 December 2009 (NASA MODIS image)

This image, from the NASA Earth Observatory (click on the image to view the original full-size version) shows the northern part of the Republic of Vanuatu in the south-west Pacific. It was acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA’s Terra satellite on 3 December 2009 and shows two currently active Vanuatu volcanoes: Ambrym (bottom right) and Gaua (top left). Detail views of both are shown below.

The current eruptive phase at Ambrym, which has a history of frequent eruptions over the last 2000 years or so, began in May 2008; an earlier Earth Observatory image showed an instance of the vog that Ambrym’s sulphur dioxide emissions can produce. Gaua, meanwhile, which last erupted in 1982, has been restless since the autumn of this year: evacuations were recently ordered when gas and ash emissions from its active cone (Mt Garat) were making life impossible for the inhabitants of nearby villages. Another very active Vanuatu volcano, Yasur, is out of shot to the south.

Ambrym volcano, Vanuatu, 3 December 2009 (NASA MODIS image detail)
Above: Ambrym volcano, Vanuatu, emitting a thin plume to the west on 3 December 2009.

Gaua volcano, Vanuatu, 3 December 2009 (NASA MODIS image detail)
Above: Gaua or Santa Maria island and Gaua volcano, Vanuatu, on 3 December 2009. The lake partially filling the 6 x 9 km caldera has developed a crescent shape because of the construction of the currently active cone of Mt Garat. The brown marking on the western side of the island shows where recent gas emissions from Mt Garat have caused damage to vegetation.

Information
Global Volcanism Program: Ambrym – summary information for Ambrym (0507-04=)
Global Volcanism Program: Gaua – summary information for Gaua (0507-02=)
Vanuatu Geohazards Observatory – official Vanuatu geohazards website
Vanuatu volcanoes and volcanics – information from the USGS Cascades Volcano Observatory

The Volcanism Blog