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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

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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

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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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Puyehue Cordón Caulle at the NASA Earth Observatory 9 March 2012

Posted by admin in Chile, NASA Earth Observatory, natural hazards, Puyehue.
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The eruption under way at the Puyehue Cordón Caulle volcanic complex in Chile, which began in June 2011 and which caused large-scale evacuations and much disruption last year, may yet reach its first anniversary but appears to be waning. The NASA Earth Observatory has published images of the volcano captured in February and March 2012 which show a small diffuse plume, much reduced from the voluminous ashy emissions that were causing so many difficulties across South America and further afield last year. Click on the image below (MODIS/Terra image, 7 March 2012) to go to the article at the NASA Earth Observatory.

Puyehue Cordon Caulle, 7 March 2012 (NASA MODIS/Terra image).

As the Earth Observatory article points out, although ash levels are much reduced the legacy of Puyehue’s emissions remains for the local environment, with vegetation killed and lakes coated in floating particulates. An article at the Nature News Blog discusses some of the effects of the eruption on regional ecosystems. Recovery will of course occur, as the article recognizes, ending with the confident prediction by an Argentinian scientist that ‘the ecosystems will recover in due course’. Indeed, it is somewhat anthropocentric to talk, as the Nature News article does, of volcanic ash ‘disrupting’ local ecosystems when volcanoes are themselves a part of those systems.

Puyehue-Cordón Caulle – NASA Earth Observatory, 9 March 2012
Chilean volcano’s ash is still disrupting ecosystems – Nature News Blog, 22 February 2012

The Volcanism Blog

Smithsonian/USGS Weekly Volcanic Activity Report 29 February – 6 March 2012 8 March 2012

Posted by admin in activity reports, Alaska, Bagana, Bezymianny, Canary Islands, Chile, Cleveland, Ecuador, eruptions, Etna, Fuego, Guatemala, Hawaii, Hierro, Italy, Japan, Kamchatka, Kanaga, Karymsky, Kilauea, Kizimen, Mexico, Papua New Guinea, Popocatépetl, Puyehue, Russia, Sakura-jima, Santa María, Shiveluch, Spain, Suwanose-jima, 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 29 February to 6 March 2012. The report is compiled by Sally Kuhn Sennert. Some of the highlights of the volcanic week:

  • Continuing activity at Etna including strombolian eruptions, lava fountaining and lava flows
  • Explosions at Fuego produced plumes that reached 0.6 km above the crater
  • Plumes rose to 1 km above Puyehue-Cordón Caulle as low-level eruptive activity continues

SI/USGS Weekly Volcanic Activity Report 29 February - 6 March 2012

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 29 February – 6 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), Etna (Italy), Kanaga (Alaska, USA), Tungurahua (Ecuador).

Ongoing activity: Bagana (Papua New Guinea), Fuego (Guatemala), Hierro (Canary Islands), Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Popocatépetl (Mexico), Puyehue-Cordón Caulle (Chile), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Suwanose-jima (Japan).

Note: ‘a.s.l.’ = ‘above sea level’.

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Smithsonian/USGS Weekly Volcanic Activity Report 22-28 February 2012 1 March 2012

Posted by admin in activity reports, Alaska, Bezymianny, Canary Islands, Chile, Cleveland, Costa Rica, Ecuador, eruptions, Guatemala, Hawaii, Hierro, Japan, Kamchatka, Kanaga, Karymsky, Kilauea, Kizimen, Mexico, Popocatépetl, Puyehue, Russia, Sakura-jima, Santa María, Shiveluch, Spain, 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 22 February to 28 February 2012. The report is compiled by Sally Kuhn Sennert. Some of the highlights:

  • Rincón de la Vieja: two eruptions from Rincón de la Vieja’s active crater
  • Tungurahua: moderate activity continues, with ashfall, incandescence, steam-and-ash plume
  • Puyehue-Cordón Caulle: low-level eruptive activity continues, with lava flows and ash plumes
  • Santa María: explosions produced 0.6-1.3 km plumes and ashfall, pyroclastic flows reported

SI/USGS Weekly Volcanic Activity Report 22-28 February 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 22-28 February 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), Kanaga (Alaska, USA), Rincón de la Vieja (Costa Rica), Tungurahua (Ecuador).

Ongoing activity: Bezymianny (Russia), Hierro (Canary Islands), Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Popocatépetl (Mexico), Puyehue-Cordón Caulle (Chile), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia).

Note: ‘a.s.l.’ = ‘above sea level’.

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Smithsonian/USGS Weekly Volcanic Activity Report 29 June – 5 July 2011 7 July 2011

Posted by admin in activity reports, Africa, Batu Tara, Chile, Dukono, Eritrea, eruptions, Guatemala, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kirishima, Kizimen, Kliuchevskoi, Lokon-Empung, Nabro, Philippines, Puyehue, Sakura-jima, Santa María, Shiveluch, Soputan, Taal, United States, Weekly Volcanic Activity Reports.
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Here is the latest Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report which covers the week 29 June – 5 July 2011, and is compiled by Sally Kuhn Sennert. Some of the highlights:

  • Kliuchevskoi: eruption produces a plume to 7 km altitude
  • Nabro: lava flows remain hot, brown ash plume rising from vent
  • Puyehue-Cordón Caulle: eruption continues, with active lava flows, and low white/grey plumes
  • Soputan: an apparent strombolian eruption produced 6 km plume and ashfall

SI/USGS Weekly Volcanic Activity Report 22-28 June 2011

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

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 29 June – 5 July 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: Kirishima (Japan), Kliuchevskoi (Russia), Lokon-Empung (Indonesia), Nabro (Eritrea), Puyehue-Cordón Caulle (Chile), Soputan (Indonesia).

Ongoing activity: Batu Tara (Indonesia), Dukono (Indonesia), Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Sakura-jima (Indonesia), Santa María (Guatemala), Shiveluch (Russia), Taal (Philippines).

Note: ‘a.s.l.’ = ‘above sea level’.

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Smithsonian/USGS Weekly Volcanic Activity Report 22-28 June 2011 4 July 2011

Posted by admin in activity reports, Africa, Ambrym, Batu Tara, Chile, Eritrea, eruptions, Fuego, Guatemala, Hawaii, Indonesia, Kamchatka, Karymsky, Kilauea, Kirishima, Kizimen, Nabro, Pacific, Planchón-Peteroa, Russia, Sakura-jima, Shiveluch, United States, Vanuatu, Weekly Volcanic Activity Reports.
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Here’s the Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report for the week 22-28 June 2011, compiled by Sally Kuhn Sennert. Some of the highlights:

  • Ambrym: degassing, occasional explosions, light ashfall
  • Nabro: eruption continues, with plumes of water vapour and sulphur dioxide, lava flows and ashfall
  • Puyehue-Cordón Caulle: eruption continues, with active lava flow, and ash clouds affecting air traffic
  • Planchón-Peteroa: ash and gas-and-steam plumes detected

SI/USGS Weekly Volcanic Activity Report 22-28 June 2011

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

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 22-28 June 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: Ambrym (Vanuatu), Kirishima (Japan), Nabro (Eritrea), Puyehue-Cordón Caulle (Chile).

Ongoing activity: Batu Tara (Indonesia), Fuego (Guatemala), Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Planchón-Peteroa (Chile), Sakura-jima (Japan), Shiveluch (Russia).

Note: ‘a.s.l.’ = ‘above sea level’.

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Puyehue-Cordón Caulle corked: a small-scale case-study of media sensationalism 24 June 2011

Posted by admin in Chile, eruptions, Puyehue.
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Even by the standards of sensationalized volcano stories in the mainstream media the headline in the Sydney Morning Herald and some other news sources today is pretty silly: ‘Red alert as “cork” plugs volcano’. This headline does what such headlines so often do: create a false sense of an urgent, dangerous situation by misrepresenting the facts. That little word ‘as’ is very important in the creation of this effect. There is indeed a red alert at Puyehue-Cordón Caulle, there has been since the eruption began: but by putting the word ‘as’ after the words ‘red alert’ an entirely baseless impression is created that the red alert is the result of whatever situation is described after the ‘as’. By the third word of the headline an expectation of potential disaster is established in the reader’s mind, and s/he is thus pre-disposed to react with alarm and concern to the news that a ‘cork’ is plugging the volcano. The word ‘cork’ itself confirms the impression — everyone knows what corks do, they contain pressure and when they are released an explosion results. This is made explicit in the original AFP story: ‘Geologists said a “cork” of lava, which emerged on Tuesday and was blocking even more lava from spewing forth, had the potential to create a huge build-up in pressure’. The headline rests neatly on that word ‘cork’ in the middle: the words preceding it prepare the reader for danger, the words after it confirm the nature of that danger, and another volcano scare story is set merrily upon its way.

By the time the AFP story has reached Earthweek it has become enveloped in a general air of breathless anxiety, as a standard bulletin from SERNAGEOMIN on the activity of the volcano becomes ‘an urgent warning’ about building pressure and powerful blasts: ‘geologists issued an urgent warning late Wednesday, saying a “cork” of lava had begun to block the volcano’s crater, building up pressure that could lead to another powerful blast’. The bulletins on Puyehue-Cordón Caulle, by the way, are normally released by SERNAGEOMIN around 15:30-16:00 local time, but of course it’s much more exciting to talk of ‘an urgent warning’ issued ‘late Wednesday’ than of ‘a standard bulletin’ issued ‘in the middle of the afternoon, as usual’.

The facts upon which the story is based in no way justify the alarmism of the Australian headlines, still less the utter rubbish from Earthweek. The ‘red alert’, as stated above, was in place anyway, and has not been changed as a result of the current situation. The ‘cork’ plugging the volcano is no big deal. Here’s what SERNAGEOMIN actually reports in its most recent bulletin for Puyehue-Cordón Caulle: ‘the possibility of an explosive event still remains because of possible obstruction of the conduit by the lava erupted and/or changes in the dynamics of the eruption, although there is little likelihood that it will reach the magnitude of the initial eruptive phase’. That is standard wording for a standard situation: the volcano has begun erupting lava, cooled lava may block the conduit creating the circumstances for explosive activity caused by continuing pressure within the volcanic system. This is not a disaster movie scenario, just one that needs careful watching (which is what SERNAGEOMIN is doing).

There is a particularly Australian context to the Sydney Morning Herald‘s daft headline. The flight disruptions caused by ash from Puyehue-Cordón Caulle have given Australia a lot of problems, and it’s understandable that Australian newspapers and their readers are sensitive about volcanic activity — particularly the threat of more explosive activity and more ash. But that’s all the more reason not to over-react, to get the facts right, and not resort to lazy sensationalism.

News
Red alert as ‘cork’ plugs volcanoSydney Morning Herald, 24 June 2011
Red alert as ‘cork’ plugs volcanoThe Age, 24 June 2011
Experts warn Chile volcano could explode again – AFP, 24 June 2011
Chile volcano could explode againHerald Sun, 24 June 2011
Aviation halted for second week by Chile eruption – Earthweek, 24 June 2011

Information
Global Volcanism Program: Puyehue-Cordón Caulle volcanic complex – summary information for the PCCVC (1507-15=)
Servicio Nacional de Geología y Minería – website of Chile’s SERNAGEOMIN
OVDAS-SERNAGEOMIN bulletins for Puyehue-Cordón Caulle – PDF files are available from this page of the OVDAS website

The Volcanism Blog

Smithsonian/USGS Weekly Volcanic Activity Report 15-21 June 2011 23 June 2011

Posted by admin in activity reports, Africa, Batu Tara, Chile, Costa Rica, Egon, Eritrea, eruptions, Etna, Hawaii, Indonesia, Italy, Kamchatka, Karymsky, Kilauea, Nabro, Paluweh, Russia, Shiveluch, Turrialba, United States, Weekly Volcanic Activity Reports.
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The Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report, compiled by Sally Kuhn Sennert, has been issued for the week 15-21 June 2011. Some of the highlights:

  • Etna: renewed ash emissions from Bocca Nuova
  • Nabro: eruption continues, with plumes of water vapour and sulphur dioxide
  • Puyehue-Cordón Caulle: a viscous lava flow observed as eruptive activity continues
  • Turrialba: a new crater lake observed at the summit

SI/USGS Weekly Volcanic Activity Report 15-21 June 2011

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

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 15-21 June 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), Nabro (Eritrea), Puyehue-Cordón Caulle (Chile), Turrialba (Costa Rica).

Ongoing activity: Batu Tara (Indonesia), Egon (Indonesia), Karymsky (Russia), Kilauea (Hawaii, USA), Paluweh (Indonesia), Shiveluch (Russia).

Note: ‘a.s.l.’ = ‘above sea level’.

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