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SI/USGS Weekly Volcanic Activity Report, 22-28 September 2010 30 September 2010

Posted by admin in activity reports, Alaska, Caribbean, Chile, Cleveland, Dukono, Ecuador, eruptions, Hawaii, Indian Ocean, Indonesia, Japan, Kamchatka, Karangetang, Karymsky, Kilauea, Kliuchevskoi, Merapi, Piton de la Fournaise, Planchón-Peteroa, Reventador, Russia, Sakura-jima, Shiveluch, Sinabung, Soufrière Hills, Suwanose-jima, United States, Weekly Volcanic Activity Reports.
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Here is the Weekly Volcanic Activity Report for 22-28 September 2010, published by the Global Volcanism Program and compiled by Sally Kuhn Kennert. Some highlights:

  • Merapi: increased seismicity and inflation detected
  • Piton de la Fournaise: significant increase in seismic activity – signs that eruption is imminent
  • Reventador: three seismic events including episodes of tremor detected

SI/USGS Weekly Volcanic Activity Report 22-28 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 22-28 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: Karangetang [Api Siau] (Indonesia), Kliuchevskoi (Russia), Merapi (Indonesia), Piton de la Fournaise, Reunion Island | Planchón-Peteroa, Central Chile-Argentina border | Sinabung, Sumatra (Indonesia).

Ongoing activity: Cleveland (Alaska, USA), Dukono (Indonesia), Karymsky (Russia), Kilauea (Hawaii, USA), Reventador (Ecuador), Sakura-jima (Japan), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan).

Note: a.s.l. = ‘above sea level’.

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Indonesia: Sinabung alert level down, Merapi and Karangetang alert levels up 24 September 2010

Posted by admin in activity reports, eruptions, Indonesia, Karangetang, Merapi, Sinabung.
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The Volcanological Survey of Indonesia (VSI) has adjusted the alert levels of three Indonesian volcanoes over the past few days: the alert level for Sinabung has been lowered, while the alert levels for Merapi and Karangetang have been raised.

Sinabung, which re-awoke dramatically at the end of August, has seen no further significant explosive activity during the last two weeks but is still producing plumes to altitudes of several kilometres and cyclically inflating and deflating. The government’s evacuation order for the surrounding area remains in force, although many local people have been returning to their homes. Yesterday the VSI reported that ‘the activity of Mount Sinabung showed a decrease according to observations of seismicity, deformation and SO2 concentration’, and accordingly lowered the alert level for Sinabung from the highest level of Red (level 4) to the second-highest level of Orange (level 3). A PDF of the announcement (in Indonesian) can be downloaded from this page on the VSI site.

Merapi, a youthful and highly-active volcano with a deadly history, has been quiet since May 2008. Early this month an increase in seismicity was detected which became more marked over the first two weeks of September. By 19 September the VSI was reporting high levels of seismicity and signs of inflation on the southern flank of the volcano (up to 11 mm per day), and increased gas emissions. After evaluating the observations and data from Merapi, the VSI raised the alert level for the volcano from normal (level 1) to Yellow (level 2) on 20 September 2010.

Karangetang, also known as Api Siau, erupted on 6 August 2010, leaving four people missing and one confirmed dead according to news reports, as a lava dome collapse produced pyroclastic flows that descended the west flank and swept away a number of houses. An ash plume from the eruption rose to 9.1 km altitude. The alert level for Karangetang (contrary to some news reports) was not raised at the time of this eruption but remained at Yellow (level 2).During September Karangetang has continued to display high levels of seismic activity, with an episode of tremor beginning on the evening of 22 September prompting the VSI to increase the alert level from level 2 to Orange (level 3), the second-highest alert level, on 23 September 2010. News reports yesterday spoke of lava being erupted by Karangetang, and ‘thunderous explosions’ being heard by people in surounding communities.

[Thanks to PP for helping with translations from the Indonesian.]

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.

News
Warning status raised as Indonesian volcano heats upJakarta Globe, 24 September 2010
Kembali semburkan lava – Indosiar.com, 24 September 2010

Information
Global Volcanism Program: Sinabung – summary information for Sinabung (0601-08=)
Global Volcanism Program: Merapi – summary information for Merapi (0603-25=)
Global Volcanism Program: Karangetang [Api Siau] – summary information for Karangetang (0607-02=)
Volcanological Survey of Indonesia – News and information portal for the Volcanological Survey of Indonesia

The Volcanism Blog

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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SI/USGS Weekly Volcanic Activity Report 1-7 September 2010 9 September 2010

Posted by admin in activity reports, Alaska, Batu Tara, Bezymianny, Chile, Cleveland, Dukono, Ecuador, Ekarma, eruptions, Etna, Guatemala, Hawaii, Indonesia, Italy, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Manam, Pacaya, Papua New Guinea, Planchón-Peteroa, Russia, Sakura-jima, Sangay, Seulawah Agam, Shiveluch, Sinabung, United States, Villarrica, Weekly Volcanic Activity Reports.
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Another week, another Weekly Volcanic Activity Report from the volcano-watchers of the Global Volcanism Program. The report is compiled by Sally Kuhn Sennert.

  • Ekarma: continuing strong steam-and-gas emissions
  • Etna: a powerful explosion followed by ash emissions on 25 August
  • Planchón-Peteroa: an explosive eruption on 6 September
  • Kliuchevskoi: a possible eruption on 3 September

SI/USGS Weekly Volcanic Activity Report 1-7 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 1-7 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: Ekarma (Russia), Etna (Italy), Kliuchevskoi (Russia), Manam (Papua New Guinea), Planchón-Peteroa (Chile), Seulawah Agam (Indonesia), Sinabung (Indonesia), Villarrica (Chile).

Ongoing activity: Batu Tara (Indonesia), Bezymianny (Russia), Cleveland (Alaska, USA), Dukono (Indonesia), Karymsky (Russia), Kilauea (Hawaii USA), Pacaya (Guatemala), Sakura-jima (Japan), Sangay (Ecuador), Santa María (Guatemala), Shiveluch (Russia).

Note: a.s.l. = ‘above sea level’.

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Sinabung erupts again: ash reaches 7.5 km a.s.l. 7 September 2010

Posted by admin in activity reports, eruptions, Indonesia, Sinabung.
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Mount Sinabung in northern Sumatra continues to be highly active. The Indonesian Volcanological Authority (VSI) has confirmed another eruption in the early hours of this morning: the VSI reports that ‘shallow earthquakes’ from around 21:00 on 6 September were followed by an explosive eruption beginning at 00:23 and lasting until 00:38 on 7 September (all times are local). ‘Thick black smoke’ reached an altitude of approximately 5000 m above the crater, with the plume being blown towards the south-east. Darwin VAAC is reporting ash from Sinabung at FL250 (25,000 ft / 7.5 km altitude) – i.e. the 5000 m altitude of the emissions plus the height of Sinabung itself, which is about 2.5 km.

Chief Government volcanologist Surono is quoted by Reuters as describing this as ‘the biggest eruption yet’. A VSI spokeswoman told Malaysia’s Bernama news agency that the sound of the eruption was audible 8 km away from the volcano. Volcanic deposits of up to 1 cm thickness have been reported in nearby villages, and the ashfall situation has been made worse by heavy rain in the area overnight. Indonesian President Susilo Bambang Yudhoyono, who was making an official visit to the area (with entourage), was forced to stay there when his flight back to Jakarta was delayed by this latest eruption.

There are no reports of deaths or injuries from the latest activity, but there is concern for local villagers and farmers who have returned to the evacuated zone around the volcano to safeguard their properties.

For those who can read Indonesian, a PDF briefing on the eruption is available from the VSI’s publications archive, and the regular briefings on Sinabung’s activity can be downloaded as PDF documents from a table labelled ‘Perkembangan Kegiatan G. Sinabung’ on the VSI main page. The latest briefing, released at 06:00 on 7 September, can be downloaded here.

UPDATE. An Indonesian Geological Service webcam for Sinabung can be found via this page: click on the weird little eye in the lower part of the satellite image and the webcam view will pop up (or just click here for a direct link to the image – manual refresh required).

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

News
Indonesian volcano blows again, biggest eruption yet – Reuters, 7 September 2010
Volcano re-erupts in Indonesia – Bernama, 7 September 2010
Indonesian volcano erupts again – Earth Times News, 7 September 2010
Long-dormant Indonesian volcano erupts again – CNN, 7 September 2010
Indonesian volcano unleashes violent eruption – AFP, 7 September 2010
President visits Mount Sinabung, asks refugees to be patientJakarta Post, 7 September 2010

Information
Global Volcanism Program: Sinabung – summary information for Sinabung (0601-08=)
Volcanological Survey of Indonesia – News and information portal for the Volcanological Survey of Indonesia (site often down)

The Volcanism Blog

Indonesia: another eruption at Sinabung, and alert level increased at Seulawah Agam 3 September 2010

Posted by admin in activity reports, eruptions, Indonesia, Seulawah Agam, Sinabung.
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News reports from Indonesia say that Mount Sinabung erupted again this morning for the third time since it re-awoke early on Sunday 29 August. Today’s eruption began at around 04:45 and seems to have lasted about five minutes and sent a plume up to 3 km altitude (10,000 feet). Reports describe the eruption as the strongest so far with a tremor that was felt up to 8 km away from the volcano and substantial ashfall. Darwin VAAC issued an ash advisory this morning reporting ash at FL100 (10,000 feet) based on data from the Indonesian volcanological authorities, but weather conditions have prevented any satellite confirmation of the altitude and extent of the emissions.

Some local residents had begun to move back to their homes since the last eruption on Monday, but the Indonesian authorities say that all have been evacuated once again: ‘Last night the area within a six-km (four-mile) radius of the volcano was evacuated, all the police and people who had gone back to guard their homes and livestock got out’, government vulcanologist Surono is quoted as saying. ‘I predicted there would be a big eruption and I was right’.

Via Eruptions comes more Indonesian volcano news: Seulawah Agam in north-western Sumatra has had its alert level raised  from ‘normal’ to ‘yellow’ (alert level 2) because of increased seismic activity since April this year.

News
Indonesia’s Mount Sinabung erupts again early Friday – Bernama, 3 September 2010
Smoke, dust covers Mt. Sinabung after new eruptionJakarta Post, 3 September 2010
Indonesian volcano erupts again – Press Association, 3 September 2010
Indonesian volcano spews new burst of ash – Associated Press, 3 September 2010
Villagers flee as Indonesia volcano erupts again – Reuters, 3 September 2010

Information
Global Volcanism Program: Sinabung – summary information for Sinabung (0601-08=)
Global Volcanism Program: Seulawah Agam – summary information for Seulawah Agam
Volcanological Survey of Indonesia – News and information portal for the Volcanological Survey of Indonesia (site often down)

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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Sinabung update: evacuees returning to their homes 31 August 2010

Posted by admin in activity reports, eruptions, Indonesia, Sinabung.
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There have been no reports of further eruptive activity at Mount Sinabung in Sumatra following the eruptions of 29 and 30 August. Many of the 30,000 villagers evacuated from the environs of the volcano have been returning to their homes despite warnings from Indonesian volcanologists that it is too early to say that the situation is safe: ‘Our instruments have recorded continuous tremors in the volcano, which means that there is magma pushing upward’, says government volcanologist Agus Budianto, ‘We think there’s still a possibility that it will erupt again’. Ashfall from Sinabung has damaged crops, threatening the livelihoods of local farmers.

Meanwhile there are warning from both the Indonesian Government and relief agencies that living conditions for the evacuated people who remain in the temporary shelters are very poor, with bedding and breathing masks in short supply and the danger of disease spreading in the overcrowded accommodation.

The NASA Earth Observatory has a satellite view of Sinabung and surrounding area from 19 May 2003, which shows the intensive cultivation of the region around this volcano.

News
Villagers return to slopes of Indonesian volcano – Associated Press, 31 August 2010
Volcano evacuees in dire need of blankets, masks and sleeping mats – Reuters AlertNet, 31 August 2010
Volcano evacuees stranded as Govt warns of new burstsJakarta Globe, 1 September 2010

Information
Global Volcanism Program: Sinabung – summary information for Sinabung (0601-08=)
Volcanological Survey of Indonesia – News and information portal for the Volcanological Survey of Indonesia (site often down)

The Volcanism Blog

Another eruption at Sinabung 30 August 2010

Posted by admin in activity reports, eruptions, Indonesia, Sinabung.
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Mount Sinabung in Sumatra has followed yesterday’s eruption with a new eruption this morning, reports the Volcanological Survey of Indonesia:

Today, Monday 30 August 2010 at 06:30, Mount Sinabung re-erupted with a column of 2000 metres altitude above the summit. Please be warned of ashfall around Sinabung.

Evacuations have been continuing, with around 16,000 to 20,000 people from villages around Sinabung now living in government shelters. Masks have been distributed by government emergency officials as respiratory problems caused by ashfall are a major hazard.

There is some confusion about the height reached by the emissions produced by this latest eruption. Darwin VAAC (archived advisories here) has issued several volcanic ash advisories (0022Z, 0038Z, 0130Z, 0620Z) warning of ash at FL200 (20,000 feet / 6000 metres) but reports that local weather conditions have prevented satellite confirmation of the ash cloud. Darwin gives ‘CVGHM’ – i.e. the Indonesian volcanological authorities – as the source for the FL200 report, but the VSI clearly states ‘2000 metres’, and head Indonesia volcanologist Surono is quoted in the media as saying that ‘volcanic materials were thrown about two kilometres into the sky’. The BBC News report hedges its bets with talk of the volcano ‘sending ash and smoke several kilometres into the atmosphere’ (journalists do love their volcanic ‘smoke’), and reports that domestic flights from Medan Airport have been suspended because of the eruption.

[Thanks to PP for letting me know about the VSI report and providing a translation.]

News
Indonesia volcano erupts again after long dormancy – BBC News, 30 August 2010
Another major eruption sends more refugees from Sinabung – Tempo Interaktif, 30 August 2010
Indonesian volcano erupts again, spewing hot ash – Associated Press, 30 August 2010

Information
Global Volcanism Program: Sinabung – summary information for Sinabung (0601-08=)
Volcanological Survey of Indonesia – News and information portal for the Volcanological Survey of Indonesia (site often down)

The Volcanism Blog

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