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SI/USGS Weekly Volcanic Activity Report 3-9 February 2010 10 February 2010

Posted by admin in activity reports, Bezymianny, Caribbean, Colombia, Dukono, Ecuador, eruptions, Fukutoku-Okanoba, Galeras, Guatemala, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Pacaya, Pacific, Russia, Sakura-jima, Sarychev Peak, Shiveluch, Soufrière Hills, Suwanose-jima, Tungurahua, United States, Weekly Volcanic Activity Reports.
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Some of the volcanic activity headlines this week:

  • Fukutoku-Okanoba: Surtseyan explosions from this undersea volcano
  • Pacaya: Strombolian activity reaching 30 metres above the cone
  • Kliuchevskoi: Strombolian activity projecting material up to 300 metres above the crater
  • Sakura-jima: lava fountain activity reaching up to 1 km in height, and an ash plume alive with lightning

SI/USGS Weekly Volcanic Activity Report 3-9 February 2010

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 3-9 February 2010 has been released but is not yet available on the Global Volcanism Program website because of technical problems caused by severe weather in the eastern United States. The following is a summary and not a substitute for the full report.

UPDATE: Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 3-9 February 2010 is now available at the Global Volcanism Program website.

New activity/unrest: Bezymianny (Russia), Fukutoku-Okanoba (Japan), Pacaya (Guatemala).

Ongoing activity: Dukono (Indonesia), Galeras (Colombia), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Sakura-jima (Japan), Sarychev Peak (Russia), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan), Tungurahua (Ecuador).

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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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Tungurahua update, 4 February 2010 4 February 2010

Posted by admin in activity reports, Ecuador, eruptions, Tungurahua.
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Tungurahua: the entire flanks of the volcano covered in incandescent material, 26 January 2010, 19:37 (P. Ramon, Instituto Geofisico)
Tungurahua: the entire flanks of the volcano covered in incandescent material, 26 January 2010, 19:37 (P. Ramón, Instituto Geofísico).

Activity at Tungurahua has been following a fairly set pattern over the past few days, with constant explosions, frequent ashfall, and lahars following heavy rains. The volcano’s seismic activity continues at a ‘moderate to high level, with a tendency to increase’, reports Ecuador’s Instituto Geofísico in its daily bulletin for 3 February 2010 (PDF). Ashfall has been taking place to the west of Tungurahua, in the areas of Manzano and Choglontus. Roaring noises and explosions of moderate intensity have been reported, and the volcanological observatory at Guadelupe had its windows rattled. Some lahars occurred on the flanks of the volcano following rains overnight, and the Riobamba-Baños road was closed by mudflows.

Tungurahua: lava fountain activity at night, 26 January 2010, 20:04 (P. Ramon, Instituto Geofisico)
Tungurahua: lava fountain activity at night, 26 January 2010, 20:04 (P. Ramón, Instituto Geofísico).

The most recent special bulletin for Tungurahua, no. 4 of 29 January 2010 (PDF), reported that following the rapid increase in the intensity of Tungurahua’s activity from the beginning of the year, activity declined from 15-23 January. On 24 January this calmer period came to an end with the explosions ‘becoming much more energetic and full of ash, which was accentuated on 27 and 28 January, causing concern throughout the area’. Ash columns reached 3 km altitude, and varying levels of ashfall occurred around the volcano. Sulphur dioxide emission levels reached 1000 tonnes/day, ‘indicating the active degassing of the magmatic body responsible for the current activity’. Since that bulletin there has been a slight decrease in the intensity of Tungurahua’s activity, but there is no sign of the current eruptive cycle ending and the Instituto Geofísico expects more upswings in activity over the next few days and weeks.

The National Assembly of Ecuador has voted to declare an ‘exceptional situation’, which isn’t quite a state of emergency, in the provinves of Chimborazo, Cotopaxi, Tungurahua and Bolívar because of the damaging effects of Tungurahua’s current activity and also of a drought which has affected the area for nearly a year. The main aim of the measure is to provide assistance to farmers whose livelihoods are suffering, although what concrete form such assistance might take is far from clear.

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

News
El volcán ecuatoriano Tungurahua registra una actividad sísmica ascendente – Agencia EFE, 2 February 2010
Estado de excepción para la Sierra centro por volcán TungurahuaEl Comercio, 2 February 2010
Asamblea Nacional pide estado de excepción para provincias de Chimborazo, Bolívar, Tungurahua y Cotopaxi – ANDES, 2 February 2010

Information
Global Volcanism Program: Tungurahua – summary information for Tungurahua (1502-80=)
Instituto Geofísico (Escuela Politecnica Nacional) – Geophysical Institute of Ecuador

The Volcanism Blog

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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Tungurahua update, 14 January 2010 14 January 2010

Posted by admin in activity reports, Ecuador, eruptions, Tungurahua, volcano monitoring.
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Yesterday’s daily bulletin (PDF) from the Ecuadorian Instituto Geofísico reports a continuing increase in the level of activity at Tungurahua:

In a manner similar to preceding days the activity of the volcano has continued to increase. In the last few hours there has been a greater number of explosions considered moderate to large in size, which have generated emissions columns of approximately 3 km in height and with high ash content. Interspersed with these events, the constant presence of an emissions column of less than 2 km and with moderate ash content has been observed. Reports have been received of ashfall in some nearby towns located to the west and south-west of the volcano.

The bulletin reports 11 long period earthquakes, 33 episodes of tremor and 83 moderate to large explosions over the preceding 24 hours. Constant roars and rumbles have been occurring, ‘interspersed with cannonades that in some cases make windows vibrate’. Incandescent blocks were ejected from the summit crater and lava fountains were observed overnight, with the latter reaching 500 m above the crater and projecting material 800 m down the flanks of the volcano.

‘The monitoring of the volcano is in trouble’, says the headline in El Comercio , which reports that power cuts are causing problems for the Instituto Geofísico station at Guadelupe which co-ordinates the monitoring of Tungurahua. A failure at the local electricity plant on Saturday caused a power cut which forced the station to rely on a gasoline-drive generator which worked for only half an hour; at this point the local fire chief came to the rescue with another generator. The Instituto Geofísico has asked the provincial governor, who also chairs the Tungurahua Emergencies Committee, to ensure that the electricity company provides reliable power to the monitoring station. Meanwhile ashfall continues to cause problems for local agriculture: ‘the dust that fell in recent days is thick and white,’ says José Cuica, a farmer from El Manzano. ‘I’m screwed. You can’t shift the ash. There will be no harvest’. Local authorities in northern Penipe are preparing for an increase in Tungurahua’s activity: El Universo says that an emergency plan is in place for the city of Riobamba, but reports that the alcaldes of Riobamba and Penipe have expressed doubt that the National Government really understands how serious the situation is, or has the necessary structures in place to provide help where it is needed.

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

News
El monitoreo del volcán tiene líosEl Comercio, 14 January 2010
En Riobamba preparan plan de prevenciónEl Universo, 14 January 2010
Autoridades insisten en emergencia por volcánEl Universo, 14 January 2010

Information
Global Volcanism Program: Tungurahua – summary information for Tungurahua (1502-80=)
Instituto Geofísico (Escuela Politecnica Nacional) – Geophysical Institute of Ecuador

The Volcanism Blog

SI/USGS Weekly Volcanic Activity Report 6-12 January 2010 13 January 2010

Posted by admin in activity reports, Africa, Alaska, Barren Island, Caribbean, Chaitén, Chile, Congo (Dem. Rep.), Costa Rica, Ecuador, eruptions, Fuego, Guatemala, Hawaii, India, Indian Ocean, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Mayon, Mexico, Nyamuragira, Pacaya, Papua New Guinea, Philippines, Piton de la Fournaise, Popocatépetl, Rabaul, Redoubt, Russia, Sakura-jima, Santa María, Shiveluch, Soufrière Hills, Suwanose-jima, Tungurahua, Turrialba, United States, Weekly Volcanic Activity Reports.
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Some of the volcanic activity headlines this week:

  • Mayon: alert level lowered to 2
  • Redoubt: alert level lowered to Normal/Green
  • Tungurahua: gas-and-ash plume rose to 6.5 km altitude
  • Shiveluch: ash plumes reported rising to 4.3-6.4 km altitude
  • Soufrière Hills: extensive pyroclastic flows

SI/USGS Weekly Volcanic Activity Report 6-12 January 2010

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 6-12 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: Mayon (Philippines), Nyamuragira (Democratic Republic of Congo), Piton de la Fournaise (Réunion), Tungurahua (Ecuador), Turrialba (Costa Rica).

Ongoing activity: Barren Island (India), Chaitén (Chile), Fuego (Guatemala), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Pacaya (Guatemala), Popocatépetl (Mexico), Rabaul (Papua New Guinea), Redoubt (Alaska, USA), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan).

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Tungurahua update, 13 January 2010 13 January 2010

Posted by admin in activity reports, Ecuador, Tungurahua.
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The Instituto Geofísico has issued a new special bulletin (PDF), reporting that ‘activity at Tungurahua volcano continues to increase, especially in the last 24 hours’. The bulletin notes that seismic tremor, gas and ash emissions and strombolian activity have all increased:

At a superficial level an increase in the number of explosions has been observed, some of them sufficiently intense to be audible in the cities of Ambato and Baños; the emissions columns are of greater size, some reaching 3 km above the crater, at the same time their ash content has increased and consequently there has been an increase in ash falls, especially on the flanks of the south-western sector of the volcano; last night and early this morning sustained lava fountains were observed, that is, ejection of incandescent material from the crater, reaching heights of up to 1000 m and projecting onto the flanks of the volcano up to distances of more than 1.5 km from the crater rim; equally, the detection seismic tremor has increased substantially, recording bands with a duration of several hours when ejection of volcanic material occurs, accompanied by intense rumbles heard in locations as distant as Riobamba, Mocha and Ambato; on 8 January instruments around the volcano detected the presence of some 7,500 tonnes of sulphur gas in the emission columns, compared with values during preceding weeks of around 100-200 tonnes/day.

Field observations have revealed that around 5 mm of ash had fallen up to 10 January in Cahuají and Choglontús, with lesser accumulations in surrounding areas, and slight falls in more distant places such as Riobamba and Penipe. If ashfall continues to increase, warns the bulletin, ‘it will doubtless produce a short-term impact on the livestock and agricultural sectors, and in the medium and long term on the health of people in the affected areas’. Increased ash and lava block accumulation also raises the risk of lahars.

The Instituto Geofísico notes that during the latter half of 2008 the volcano displayed activity similar to that of the present time, and that the level of activity increased up to the end of that year but subsequently decreased by mid-January 2009 and did not progress to a larger-scale eruption.

In agricultural areas to the south-west of Tungurahua, ashfall is already causing severe problems. El Comercio reports that crops are being damaged and animals are unable to feed on pasture covered with ash. Farmers who have invested in animals, seed corn and new planting during the last few months now face the prospect of losing their livelihoods because of the reactivation of the volcano. The local authorities of affected areas are asking the National Government for financial and material assistance, say reports in Diario Hoy and El Universo, while people living around the volcano are seeking assurances that there will be sufficient police to guard their properties if they have to evacuate.

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

News
La caída de ceniza aumenta en 2 comunasEl Comercio, 12 January 2010
Tungurahua: ceniza empieza a dañar las frutasDiario Hoy, 12 January 2010
Alcaldes de zonas cercanas a volcán piden emergenciaEl Universo, 12 January 2010

Information
Global Volcanism Program: Tungurahua – summary information for Tungurahua (1502-80=)
Instituto Geofísico (Escuela Politecnica Nacional) – Geophysical Institute of Ecuador

The Volcanism Blog

Tungurahua’s restlessness continues 12 January 2010

Posted by admin in activity reports, Ecuador, Tungurahua.
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Activity at Ecuador’s Tungurahua volcano ‘continues at an activity considered as moderate, with a tendency to increase’, reports the Instituto Geofísico in its bulletin for 11 January 2010 (PDF).

Superficially the activity is characterized by the expulsion of incandescent material in the form of blocks and lava fountains, the constant generation of emission columns with a moderate to low ash content and constant roars of varying intensity, some of which have been audible in the city of Ambato. Reports of moderate falls of ash have been received from villages located to the west and south-west of the volcano. The presence of a thin layer of ash is reported from the city of Riobamba.

The Instituto Geofísico reports that ash columns from Tungurahua have been reaching a maximum altitude of 3 km. Explosions from Tungurahua have been shaking windows and waking local residents 20 km south-west of the volcano, in the canton of Penipe, El Comercio reports. Hugo Yépez, director of the Instituto Geofísico, is reported in El Tiempo to have called Tungurahua’s current activity ‘rising, but not yet at alarming levels’. Instituto Geofísico personnel have been touring villages around the volcano, advising on how local residents should respond if the activity increases, but the process does not seem to have been solely one-way, as the experts seem to have been listening to Tungurahua’s neighbours as well as talking to them: ‘the inhabitants are our best eyes, they are aware of the activity changing, even though we constantly monitor the volcano’, says Yépez. The volcanologists also rely on a network of 15 observers resident in high risk areas around the volcano established by the Comité de Operaciones de Emergencia de Tungurahua. These observers urgently need new communications equipment now that the volcano is active again, according to a report in El Comercio.

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

News
Más explosiones en el TungurahuaEl Comercio, 11 January 2010
Vulcanólogo: No se puede precisar actividad del TungurahuaEl Universo, 11 January 2010
Los vigías del Tungurahua necesitan mejores equiposEl Comercio, 11 January 2010
Tungurahua tiene en alerta a pobladoresEl Tiempo, 12 January 2010

Information
Global Volcanism Program: Tungurahua – summary information for Tungurahua (1502-80=)
Instituto Geofísico (Escuela Politecnica Nacional) – Geophysical Institute of Ecuador

The Volcanism Blog

SI/USGS Weekly Volcanic Activity Report 30 December 2009-5 January 2010 9 January 2010

Posted by admin in activity reports, Africa, Barren Island, Caribbean, Chaitén, Chile, Colombia, Congo (Dem. Rep.), Costa Rica, Ecuador, eruptions, Galeras, Guatemala, Hawaii, India, Indian Ocean, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Mayon, Nevado del Huila, Nyamuragira, Papua New Guinea, Philippines, Piton de la Fournaise, Rabaul, Rinjani, Russia, Sakura-jima, Sangay, Santa María, Shiveluch, Soufrière Hills, Suwanose-jima, Tungurahua, Turrialba, United States, Weekly Volcanic Activity Reports.
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SI/USGS Weekly Volcanic Activity Report 30 December 2009 - 5 January 2010

Click on the map for a larger version (1280 x 898 pixels). The map title gives the end of the period covered as 6 January 2010, it should be 5 January 2010. Sorry about that.

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 30 December 2009 – 5 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: Galeras (Colombia), Mayon (Philippines), Nyamuragira (Democratic Republic of Congo), Piton de la Fournaise (Réunion), Rinjani (Indonesia), Tungurahua (Ecuador), Turrialba (Costa Rica).

Ongoing activity: Barren Island (India), Chaitén (Chile), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Nevado del Huila (Colombia), Rabaul (Papua New Guinea), Sakura-jima (Japan), Sangay (Ecuador), Santa María (Guatemala), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan).

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