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Smithsonian/USGS Weekly Volcanic Activity Report 28 March to 3 April 2012 5 April 2012

Posted by admin in activity reports, Alaska, Caribbean, Chile, Cleveland, Colombia, Ecuador, Etna, Fuego, Guatemala, Hawaii, Iliamna, Indonesia, Italy, Kamchatka, Karymsky, Kilauea, Lewotobi, Mexico, Nevado del Ruiz, Popocatépetl, Puyehue, Russia, Shiveluch, Soufrière Hills, Sundoro, Tengger Caldera, Tungurahua, United States, Weekly Volcanic Activity Reports.
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The latest Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report has been published by the Global Volcanism Program, covering the week 28 March to 3 April 2012. The report is compiled by Sally Kuhn Sennert. Among the highlights of this week:

  • Alert level at Clevelandraised as a new lava dome becomes evident
  • A significant increase in seismicity at Nevado del Ruiz brings a rise in the alert level
  • High levels of sulphur dioxide emissions at Soufrière Hills
  • Another paroxysmal eruptive episode at Etna with lava fountaining and ashfall

SI/USGS Weekly Volcanic Activity Report 28 March to 3 April 2012

Click on the map for a larger version (1211 x 784 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 28 March to 3 April 2012 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: Cleveland (Alaska, USA), Fuego (Guatemala), Iliamna (Alaska, USA), Lewotobi (Indonesia), Nevado del Ruiz (Colombia), Soufrière Hills (Montserrat), Sundoro (Indonesia).

Ongoing activity: Etna (Italy), Karymsky (Russia), Kilauea (Hawaii, USA), Popocatépetl (Mexico), Puyehue-Cordón Caulle (Chile), Shiveluch (Russia), Tengger Caldera (Indonesia), Tungurahua (Ecuador).

Note: ‘a.s.l.’ = ‘above sea level’.

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Smithsonian/USGS Weekly Volcanic Activity Report 14-20 March 2012 22 March 2012

Posted by admin in activity reports, Caribbean, Chile, Cleveland, Colombia, Ecuador, Etna, Hawaii, Iliamna, Italy, Japan, Kamchatka, Karymsky, Kilauea, Kizimen, Mexico, Nevado del Ruiz, Popocatépetl, Puyehue, Russia, Sakura-jima, Shishaldin, Soufrière Hills, Tungurahua, United States, Villarrica, Weekly Volcanic Activity Reports.
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The latest Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report has been published by the Global Volcanism Program, covering the week 14-20 March 2012. The report is compiled by Sally Kuhn Sennert. Among the highlights of this week:

  • A plume, probably water vapour, seen from Iliamna, where seismicity remained elevated
  • Seismicity decreased at Nevado del Ruiz but significant gas emissions continued
  • Etna continued lively with lava flows and fountaining, and strong ash emission
  • Daily explosions at Shiveluch produced plumes which reached 3-5 km altitude

SI/USGS Weekly Volcanic Activity Report 14-20 March 2012

Click on the map for a larger version (1211 x 784 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 14-20 March 2012 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: Iliamna (Alaska, USA), Nevado del Ruiz (Colombia).

Ongoing activity: Cleveland (Alaska, USA), Etna (Italy), Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Popocatépetl (Mexico, Puyehue-Cordón Caulle (Chile), Sakura-jima (Japan), Shiveluch (Russia), Soufrière Hills (Montserrat), Tungurahua (Ecuador), Villarrica (Chile).

Note: ‘a.s.l.’ = ‘above sea level’.

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Smithsonian/USGS Weekly Volcanic Activity Report 7-13 March 2012 15 March 2012

Posted by admin in activity reports, Alaska, Bezymianny, Chile, Cleveland, Colombia, eruptions, Hawaii, Ijen, Iliamna, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kizimen, Lamongan, Marapi, Nevado del Ruiz, Puyehue, Russia, Sakura-jima, Santa María, Shiveluch, Tungurahua, United States, Villarrica, Weekly Volcanic Activity Reports.
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The latest Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report has been published by the Global Volcanism Program, covering the week 7-13 March 2012. The report is compiled by Sally Kuhn Sennert. Some of the news from a week that has seen quite a lot of new activity:

  • An explosive eruption at Bezymianny sent ash up to 8 km altitude
  • Activity at Nevado del Ruiz marked by explosions, ash emissions and increased seismicity
  • Cleveland stirs with small explosive eruptions
  • Explosions at Santa María produce localized ashfall

SI/USGS Weekly Volcanic Activity Report 7-13 March 2012

Click on the map for a larger version (1211 x 784 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 7-13 March 2012 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), Ijen (Indonesia), Iliamna (Alaska, USA), Lamongan (Indonesia), Marapi (Indonesia), Nevado del Ruiz (Colombia), Tungurahua (Ecuador).

Ongoing activity: Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Puyehue-Cordón Caulle (Chile), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Villarrica (Chile).

Note: ‘a.s.l.’ = ‘above sea level’.

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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

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

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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Signs of increasing activity at Galeras 20 October 2010

Posted by admin in activity reports, Colombia, Galeras.
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The Observatorio Vulcanológico y Sismológico de Pasto reports (bulletin of 19 October) that Galeras volcano is continuing to show increasing signs of activity after a relatively quiet few weeks. Galeras has remained at the third-highest alert level of Yellow since 7 September, when the alert level was lowered from Orange following the eruption of 25 August.

Seismic activity at Galeras continues to fluctuate, with an increase in seismic signals associated with fluid movements within the volcano since 15 October. This increased seismicity is also associated with increased gas emissions, and in the ash content of those emissions, and there has been an increase in deformation at the summit of the volcano and thermal anomalies have been detected in the crater area. All these parameters, INGEOMINAS concludes, indicate ‘the presence of magmatic material at shallow levels which continues to intrude towards the surface’.

In anticipation of a potential eruption Colombia’s Sistema Nacional para la Prevención y Atención de Desastres has advised the people living near Galeras to ‘be attentive to the recommendations of the authorities’ (they tend not to be, as as rule).

References to volcano alert levels on this blog are not authoritative and are not necessarily up to date. You should always check with official sources for the latest alert levels.

For all our Galeras coverage: Galeras « The Volcanism Blog.

News
El volcán Galeras presenta signos de reactivaciónEl Tiempo, 20 October 2010
Alerta por incremento de la actividad del vólcan GalerasEl País, 20 October 2010
Alerta por incremento en actividad volcánica del GalerasTerra Colombia, 20 October 2010
Volcán Galeras incrementó actividad volcánica – Radio Santa Fe, 20 October 2010

Information
Global Volcanism Program – Galeras – summary information for Galeras (1501-08=)
Portal Corporativo de INGEOMINAS – Instituto Colombiano de Geología y Minería
Observatorio Vulcanológico y Sismológico de Pasto – Pasto volcanological observatory main page

The Volcanism Blog

SI/USGS Weekly Volcanic Activity Report, 29 September – 5 October 2010 7 October 2010

Posted by admin in activity reports, Bagana, Batu Tara, Caribbean, Chile, Colombia, Dukono, Ecuador, eruptions, Fuego, Guatemala, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Mexico, Nevado del Huila, Nevado del Ruiz, Pacaya, Papua New Guinea, Piton de la Fournaise, Planchón-Peteroa, Popocatépetl, Reventador, Russia, Sakura-jima, Sarychev Peak, Shiveluch, Soufrière Hills, Suwanose-jima, United States, Weekly Volcanic Activity Reports.
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The Weekly Volcanic Activity Report for 29 September to 5 October 2010 is compiled by Sally Kuhn Kennert and published by the Global Volcanism Program. Some selected highlights:

  • Nevado del Huila: ash emissions reported at an altitude of 7.6 km
  • Nevado del Ruiz: increased seismicity, deformation and geochemical changes causing concern
  • Kilauea: a new breakout lava flow causes fires
  • Sarychev Peak: a diffuse ash plume reported

SI/USGS Weekly Volcanic Activity Report 29 September - 5 October 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 29 September – 5 October 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: Nevado del Huila (Colombia), Nevado del Ruiz (Colombia), Piton de la Fournaise (Réunion Island), Planchón-Peteroa (Chile), Reventador (Ecuador).

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

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SI/USGS Weekly Volcanic Activity Report 15-21 September 2010 23 September 2010

Posted by admin in activity reports, Alaska, Batu Tara, Chile, Cleveland, Colombia, Dukono, Ecuador, eruptions, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Machín, Manam, Papua New Guinea, Planchón-Peteroa, Russia, Sakura-jima, Sangay, Shiveluch, Sinabung, Suwanose-jima, United States, Weekly Volcanic Activity Reports.
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Here is the Weekly Volcanic Activity Report for 15-21 September 2010, published by the Global Volcanism Program and compiled by Sally Kuhn Kennert. Some highlights:

  • Cleveland: a thermal anomaly has been detected
  • Machín: elevated seismic activity including shallow volcanic-tectonic earthquakes beneath the lava dome
  • Planchón-Peteroa: an ash plume reached an altitude of 6.1 km

SI/USGS Weekly Volcanic Activity Report 15-21 September 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 15-21 September 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: Cleveland (Alaska, USA), Kliuchevskoi (Russia), Machín (Colombia), Manam (Papua New Guinea), Planchón-Peteroa (Chile), Sinabung (Indonesia).

Ongoing activity: Batu Tara (Indonesia), Dukono (Indonesia), Karymsky (Russia), Kilauea (Hawaii, USA), Sakura-jima (Japan), Sangay (Ecuador), Shiveluch (Russia), Suwanose-jima (Japan).

Note: a.s.l. = ‘above sea level’.

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SI/USGS Weekly Volcanic Activity Report 8-14 September 2010 16 September 2010

Posted by admin in activity reports, Alaska, Arenal, Batu Tara, Caribbean, Chile, Cleveland, Colombia, Costa Rica, Dukono, Ecuador, Ekarma, eruptions, Guatemala, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Nevado del Huila, Planchón-Peteroa, Reventador, Russia, Sakura-jima, Sangay, Santa María, Shiveluch, Sinabung, Soufrière Hills, Suwanose-jima, United States, Weekly Volcanic Activity Reports.
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The Global Volcanism Program has put together a bumper Weekly Volcanic Activity Report for 8-14 September 2010. Sally Kuhn Kennert of the GVP compiled the report. Some highlights:

  • Nevado del Huila: alert level raised following increase in seismicity and gas/ash emissions
  • Soufrière Hills: several small-to-moderate pyroclastic flows descended the dome and took parts of it down with them
  • Arenal: rumbled its way through August with gas emissions, strombolian eruptions and avalanches
  • Sinabung: threw ash plumes up to 4.3-4.6 km altitude

SI/USGS Weekly Volcanic Activity Report 8-14 September 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 8-14 September 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: Cleveland (Alaska, USA), Ekarma (Russia), Kliuchevskoi (Russia), Nevado del Huila (Colombia), Planchón-Peteroa (Chile), Santa María (Guatemala), Sinabung (Indonesia).

Ongoing activity: Arenal (Costa Rica), Batu Tara (Indonesia), Dukono (Indonesia), Karymsky (Russia), Kilauea (Hawaii USA), Reventador (Ecuador), Sakura-jima (Japan), Sangay (Ecuador), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan).

Note: a.s.l. = ‘above sea level’.

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Colombian volcano update: Galeras, Huila, Machín 15 September 2010

Posted by admin in activity reports, Colombia, Galeras, Machín, Nevado del Huila.
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Galeras erupted on 25 August: the Colombian geological authority INGEOMINAS described the eruption as ‘of low explosivity’. Ashfall was reported up to 30 km NW of the volcano, and an evacuation order was issued affecting about 7000 people (although as usual few people heeded the evacuation) there were no casualties and no reports of damage. The alert level was raised to the highest level of Red on 25 August and lowered to Orange on the following day. Tremors continued for 12 hours following the eruption before gradually declining. Evidence gathered during an overflight by INGEOMINAS on 26 August suggested that a new crater had been opened by the eruption on Galeras’s north flank. On 7 September INGEOMINAS lowered the alert level to Yellow, at which level Galeras remains. The latest bulletin (14 September) reports a low level of seismic activity and minor gas-and-ash emissions. There have been some signs of deformation since 9 September at the summit of the volcano.

Nevado del Huila has a tendency to produce sulphur dioxide emissions, and SO2 plumes from the volcano have been detected frequently since the middle of June. The level of seismicity and its intensity increased, with a greater number of shallow hybrid earthquakes beneath the main summit (Pico Central). Because of this change in Huila’s seismic behaviour, INGEOMINAS raised the alert level for the volcano from Yellow to the second-highest level of Orange on 15 June. Low-level activity continued during June, July and August, with SO2 emissions, fluctuating seismicity and small ash emissions being reported. The alert level was returned to Yellow on 6 July and remained at that level until 9 September, when a marked increase in volcanic tremor and emissions/incandescence at the summit (‘very recurrent and energetic pulses of tremor, associated with pulsing surface emissions of gas, ashes and incandescent material’) prompted INGEOMINAS to raise the alert level to Orange. The Colombian authorities have advised local residents to leave the area, and municipalities around the volcano have been making emergency preparations. The most recent bulletin of 14 September reports continuing high levels of seismicity with pulses of tremor associated with emissions of gas, ash and incandescent material, whitish-blue and grey emissions columns reaching up to 2 kilometres above the summit, and high concentrations of SO2. Nevado del Huila remains on Orange alert, ‘eruption probable within days or weeks’.

Machín experienced a volcanic-tectonic earthquake of magnitude 2.6 at 3.87 km depth yesterday, which was felt by residents in nearby towns. Seismic unrest was noted at Machín earlier this summer: on 24 July INGEOMINAS reported a ‘seismic crisis’ characterized by an increase in relatively shallow volcanic-tectonic earthquakes.  Machín has been on Yellow alert for a long time, and remains at that level.

Information
Global Volcanism Program: Galeras – summary information for Galeras (1501-08=)
Global Volcanism Program: Nevado del Huila – summary information for Nevado del Huila (1501-05=)
Global Volcanism Program: Machín – summary information for Machín (1501-04=)
Instituto Colombiano de Geología y Minería – main page for INGEOMINAS

The Volcanism Blog

SI/USGS Weekly Volcanic Activity Report 25-31 August 2010 1 September 2010

Posted by admin in activity reports, Alaska, Batu Tara, Caribbean, Cleveland, Colombia, Dukono, Ecuador, Ekarma, eruptions, Galeras, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Manam, Nevado del Huila, Papua New Guinea, Reventador, Russia, Sakura-jima, Sangay, Shiveluch, Sinabung, Soufrière Hills, Suwanose-jima, United States, Weekly Volcanic Activity Reports.
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Some highlights from a very full week of volcanic activity as reported by the Global Volcanism Program (report compiled by Sally Kuhn Sennert):

  • Ekarma: a steam plume and evidence of a possible recent small eruption reported from this volcano in the Kuril Islands
  • Galeras: an eruption on 25 August, and ashfall up to 30 km from the vent
  • Sinabung: two significant eruptions cause the evacuation of 20,000 to 30,000 local residents
  • Nevado del Huila: ash emissions accompanied by tremor

SI/USGS Weekly Volcanic Activity Report 25-31 August 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 25-31 August 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: Ekarma (Russia), Galeras (Colombia), Manam (Papua New Guinea), Sinabung (Indonesia).

Ongoing activity: Batu Tara (Indonesia), Cleveland (Alaska, USA), Dukono (Indonesia), Karymsky (Russia), Kilauea (Hawaii USA), Kliuchevskoi (Russia), Nevado del Huila (Colombia), Reventador (Ecuador), Sakura-jima (Japan), Sangay (Ecuador), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan).

Note: a.s.l. = ‘above sea level’.

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