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Smithsonian/USGS Weekly Volcanic Activity Report 1-7 June 2011 9 June 2011

Posted by admin in activity reports, Aso, Batu Tara, Chile, Dieng Volcanic Complex, Dukono, eruptions, Hawaii, Indonesia, Japan, Kamchatka, Karangetang, Karymsky, Kilauea, Kizimen, Kliuchevskoi, Pacific, Papua New Guinea, Popocatépetl, Puyehue, Rabaul, Russia, Sakura-jima, Shiveluch, United States, Vanuatu, Villarrica, Weekly Volcanic Activity Reports, Yasur.
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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 1-7 June 2011. It’s been a lively volcanic week – highlights include:

  • Dieng Volcanic Complex: carbon dioxide emissions and seismicity both remain elevated
  • Popocatépetl: ash plumes reaching altitudes between 1 and 3 km create ashfall in nearby regions
  • Puyehue-Cordón Caulle: an eruption began on 4 June following intense seismicity
  • Kilaeua: two lava lakes were active during 1-7 June

SI/USGS Weekly Volcanic Activity Report 1-6 June 2011

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 1-7 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: Aso (Japan), Dieng Volcanic Complex (Indonesia), Kliuchevskoi (Russia), Popocatépetl (Mexico), Puyehue-Cordón Caulle (Chile), Yasur (Vanuatu).

Ongoing activity: Batu Tara (Indonesia), Dukono (Indonesia), Karangetang [Api Siau] (Indonesia), Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Rabaul (Papua New Guinea), Sakura-jima (Japan), Shiveluch (Russia), Villarrica (Chile).

Note: ‘a.s.l.’ = ‘above sea level’.

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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

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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

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SI/USGS Weekly Volcanic Activity Report 10-16 February 2010 18 February 2010

Posted by admin in activity reports, Bagana, Bezymianny, Caribbean, Chaitén, Chile, Colombia, Dukono, Ecuador, eruptions, Guatemala, Hawaii, Indonesia, Japan, Kamchatka, Karangetang, Karymsky, Kilauea, Kliuchevskoi, Llaima, Nevado del Huila, Pacaya, Papua New Guinea, Russia, Sakura-jima, Shiveluch, Soufrière Hills, Suwanose-jima, Tiatia, Tungurahua, Ulawun, United States, Weekly Volcanic Activity Reports.
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Some of the volcanic activity headlines for the past week:

  • Llaima: steam-and-gas plumes detected, alert level raised
  • Soufrière Hills: major dome collapse, resulting ash plume reaches 15.2 km altitude
  • Nevado del Huila: gas emissions and thermal anomalies detected on the lava dome
  • Tungurahua: ash plumes rose to altitudes of 5.5 to 9 km

SI/USGS Weekly Volcanic Activity Report 10-16 February 2010

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 10-16 February 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), Llaima (Chile), Soufrière Hills (Montserrat), Tiatia (Russia), Ulawun (Papua New Guinea).

Ongoing activity: Bagana (Papua New Guinea), Chaitén (Chile), Dukono (Indonesia), Karangetang [Api Siau] (Indonesia), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Nevado del Huila (Colombia), Pacaya (Guatemala), Sakura-jima (Japan), Shiveluch (Russia), Suwanose-jima (Japan) | Tungurahua (Ecuador).

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SI/USGS Weekly Volcanic Activity Report 4-10 November 2009 12 November 2009

Posted by admin in activity reports, Caribbean, Chaitén, Chile, Colombia, Dukono, Ecuador, El Salvador, eruptions, Galeras, Guatemala, Hawaii, Indonesia, Japan, Kamchatka, Karangetang, Karymsky, Kilauea, Kliuchevskoi, Koryaksky, Mayon, Nevado del Huila, Papua New Guinea, Philippines, Piton de la Fournaise, Rabaul, Reventador, Russia, Sakura-jima, Santa María, Shiveluch, Soufrière Hills, Suwanose-jima, United States, Weekly Volcanic Activity Reports.
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SI/USGS Weekly Volcanic Activity Report 4-10 November 2009

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 4-10 November 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: Batur (Indonesia), Galeras (Colombia), Karangetang [Api Siau] (Indonesia), Mayon (Philippines), Nevado del Huila (Colombia), Piton de la Fournaise (Réunion), Reventador (Ecuador), San Vicente (El Salvador).

Ongoing activity: Chaitén (Chile), Dukono (Indonesia), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Koryaksky (Russia), Rabaul (Papua New Guinea), Sakura-jima (Japan), Santa María (Guatemala) Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan).

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SI/USGS Weekly Volcanic Activity Report 28 October – 3 November 2009 5 November 2009

Posted by admin in activity reports, Barren Island, Caribbean, Chaitén, Chile, Colombia, Dukono, Ebeko, eruptions, Galeras, Hawaii, India, Indian Ocean, Indonesia, Japan, Kamchatka, Karangetang, Karymsky, Kilauea, Kliuchevskoi, Krakatau, Manam, Mexico, Nevado del Huila, Papua New Guinea, Popocatépetl, Rabaul, Sakura-jima, Shiveluch, Soufrière Hills, Suwanose-jima, United States, Weekly Volcanic Activity Reports.
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SI/USGS Weekly Volcanic Activity Report 28 October - 3 November 2009

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 28 October – 3 November 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: Ebeko (Russia), Galeras (Colombia), Karangetang [Api Siau] (Indonesia), Manam (Papua New Guinea), Nevado del Huila (Colombia), Soufrière Hills (Montserrat).

Ongoing activity: Barren Island (India), Chaitén (Chile), Dukono (Indonesia), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Krakatau (Indonesia), Popocatépetl (Mexico), Rabaul (Papua New Guinea), Sakura-jima (Japan), Shiveluch (Russia), Suwanose-jima (Japan).

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SI/USGS Weekly Volcanic Activity Report, 3-9 June 2009 11 June 2009

Posted by admin in activity reports, Alaska, Batu Tara, Chaitén, Chile, Colombia, Dukono, Ecuador, eruptions, Fuego, Galeras, Guatemala, Hawaii, Japan, Kamchatka, Karangetang, Karymsky, Kelut, Kilauea, Llaima, Manam, Mexico, Pacaya, Papua New Guinea, Peru, Popocatépetl, Rabaul, Redoubt, Russia, Sakura-jima, Santa María, Shiveluch, Slamet, Tungurahua, Ubinas, United States, Weekly Volcanic Activity Reports.
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SI/USGS Weekly Volcanic Activity Report 3-9 June 2009

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 3-9 June 2009 is available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity: Galeras (Colombia), Karangetang (Indonesia), Sangeang Api (Indonesia), Slamet (Indonesia).

Ongoing activity: Batu Tara (Indonesia), Chaitén (Chile), Dukono (Indonesia), Fuego (Guatemala), Karymsky (Russia), Kelut (Indonesia), Kilauea (USA), Llaima (Chile), Manam (Papua New Guinea), Pacaya (Guatemala), Popocatépetl (Mexico), Rabaul (Papua New Guinea), Redoubt (USA), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Tungurahua (Ecuador), Ubinas (Peru).

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SI/USGS Weekly Volcanic Activity Report, 27 May-2 June 2009 3 June 2009

Posted by admin in activity reports, Bagana, Batu Tara, Caribbean, Chaitén, Chile, Colombia, Dukono, Ecuador, eruptions, Etna, Hawaii, Indonesia, Italy, Japan, Kamchatka, Karangetang, Kilauea, Llaima, Makian, Nevado del Huila, Papua New Guinea, Popocatépetl, Rabaul, Redoubt, Russia, Sakura-jima, Shiveluch, Slamet, Soufrière Hills, Tungurahua, Ubinas, United States.
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SI/USGS Weekly Volcanic Activity Report 27 May-2 June 2009

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 27 May-2 June 2009 is available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity: Karangetang (Indonesia), Makian (Indonesia), Slamet (Indonesia).

Ongoing activity: Bagana (Papua New Guinea), Batu Tara (Indonesia), Chaitén (Chile), Dukono (Indonesia), Etna (Italy), Kilauea (Hawaii, USA), Llaima (Chile), Nevado del Huila (Colombia), Popocatépetl (Mexico), Rabaul (Papua New Guinea), Redoubt (Alaska, USA), Sakura-jima (Japan), Shiveluch (Russia), Soufrière Hills (Montserrat), Tungurahua (Ecuador), Ubinas (Peru).

NEW ACTIVITY

Karangetang (Indonesia). 30-31 May, seismicity increased and tremor was detected. Diffuse white plumes rose 10-50 m and crater incandescence was seen on 30 May, white emissions rose 100 m above Utama Crater on 31 May, incandescent material descended as far as 2.3 m, mostly down S flank.

Makian (Indonesia). Seismicity, particularly tremor, increased during 28 May-2 June.

Slamet (Indonesia). 27 May, ash plume rose to 4.3 km a.s.l., possible plume rose to 6.1 km.

ONGOING ACTIVITY

Bagana (Papua New Guinea). 2 June, ash plume to 2.4 km a.s.l., drifted 75 km W.

Batu Tara (Indonesia). 27 May-2 June, ash plumes to 2.4 km a.s.l., drifted 25-75 km NW, W and SW; thermal anomaly detected 29 May.

Chaitén (Chile). 20-27 May, gas-and-ash plumes rose 1.5 km from the growing lava dome complex and collapses caused by instable slopes generated block-and-ash flows. Seismicity remained elevated with large hybrid earthquakes at 5-9 km beneath the western part of the dome complex. 28-29 May and 1-2 June, ash plumes rose to 1.8-2.4 km a.s.l.

Dukono (Indonesia). 27-28 May, ash plumes to 3 km a.s.l., drifted 55-110 km NE.

Etna (Italy). 25-31 May, the NW-SE-trending fissure E of the summit craters continued to produce active lava flows, There was degassing from the Northeast Crater, the NW and SE Bocca Nuova vents, from the E flank of the Southeast Crater and at summit fumarolic fields.

Kilauea (Hawaii, USA). 27 May-2 June, lava continued to flow SE through lava tubes to the Waikupanaha ocean entry and (until 31 May) the Kupapa’u ocean entry. Active surface lava flows were also detected on 30 May. The Halema’uma’u crater vent continued to produce a mainly white plume with an occasional brown tinge, that drifted mainly SW. A molten lava pool near the base of the cavity produced varying incandescence.

Llaima (Chile). A 2-square-kilometre area of elevated temperatures was observed on the E flank during an overflight on 1 June. Small areas of gas emission, a small cone in formation about 800 m below the crater and a 300-metre-long E-W-trending fissure 200 m from the rim of the main crater, emitting brown ash and steam plumes, were also observed. There were weak fumaroles at the summit crater.

Nevado del Huila (Colombia). A seismic swarm took place on 28 May that included magnitude 4 and 4.8 earthquakes. On 31 May an episode of tremor occurred associated with an ash emission, and a further pulse of tremor was detected on 2 June.

Popocatépetl (Mexico). 27 May-2 June, emissions of steam and gas observed, with slight amounts of ash during 27-29 May.

Rabaul (Papua New Guinea). 21-28 May, white and occasionally blue plumes from Tavurvur cone rose 1 km above the crater and incandescence from the summit crater was observed at night.

Redoubt (Alaska, USA). Seismicity remained low but above background 27 May-2 June. Lava dome growth continued.

Sakura-jima (Japan). An explosion on 30 May produced a plume to 4.6 km a.s.l. that drifted SE. On 31 May an ash plume rose to 3 km a.s.l., and on 1 June eruptions produced plumes to 2.1-3.4 km a.s.l, some of which drifted S.

Shiveluch (Russia). Seismic activity was above background levels 22-29 May; steam-and-gas emissions were observed 21-23 May, and plumes with small amounts of ash rose to 4 km a.s.l. on 22 May. A daily thermal anomaly was detected over the lava dome.

Soufrière Hills (Montserrat). Activity during 22-29 May was at a low level: a possible small explosion followed by a rockfall occurred on 23 May, and a small pyroclastic flow descended 1 km E on 24 May, producing an ash plume that drifted W.

Tungurahua (Ecuador). Strombolian activity was observed at night during 26-28 May, followed by nocturnal incandescence at the crater until 1 June. On 27-29 and 31 May thermal anomalies were detected. There was the usual range of noises: explosions, cannonades and roars. Steam-and-ash plumes rose to 7 km a.s.l. and drifted W and SW on 28 May, and ashfall was reported 28-30 May.

Ubinas (Peru). On 29 and 31 May eruptions produced ash plumes to 5.5-6.7 km a.s.l. that drifted NE and SW. A bluish gas plume with some ash content was reported on 1 June, and gas-and-ash plumes rose 0.9-1.5 km a.s.l. and drifted SE following an explosion on 2 June.

ACKNOWLEDGEMENTS AND DISCLAIMER

The foregoing is a summary of the Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 27 May-2 June 2009. It is provided for information only, and is based on but not a substitute for the full report, which comes with its own criteria and disclaimers. for the full report, which comes with its own criteria and disclaimers. The map base is derived from the Smithsonian Institution/USGS/US Naval Research Laboratory This Dynamic Planet website.

For all our coverage of the SI/USGS Weekly Volcanic Activity Reports: Weekly Volcanic Activity Reports « The Volcanism Blog.

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SI/USGS Weekly Volcanic Activity Report, 20-26 May 2009 27 May 2009

Posted by admin in activity reports, Alaska, Barren Island, Batu Tara, Caribbean, Chaitén, Chile, Colima, Dukono, Ebeko, Ecuador, eruptions, Fuego, Guatemala, Hawaii, India, Indonesia, Japan, Kamchatka, Karangetang, Kilauea, Llaima, Mexico, Papua New Guinea, Peru, Rabaul, Redoubt, Reventador, Russia, Sakura-jima, Shiveluch, Slamet, Soufrière Hills, Suwanose-jima, Tungurahua, Ubinas, United States, Veniaminof, Weekly Volcanic Activity Reports.
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SI/USGS Weekly Volcanic Activity Report 20-26 May 2009

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 20-26 May 2009 is available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity: Karangetang (Indonesia), Reventador (Ecuador), Slamet (Indonesia)

Ongoing activity: Barren Island (India), Batu Tara (Indonesia), Chaitén (Chile), Colima (Mexico), Dukono (Indonesia), Ebeko (Russia), Fuego (Guatemala), Kilauea (Hawaii, USA), Llaima (Chile), Rabaul (Papua New Guinea), Redoubt (Alaska, USA), Sakura-jima (Japan), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan), Tungurahua (Ecuador), Ubinas (Peru), Veniaminof (Alaska, USA).

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Warnings issued as Karangetang erupts 4 December 2008

Posted by admin in activity reports, eruptions, Indonesia, Karangetang.
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Karangetang volcano (also known as Api Siau), situated at the northern end of the island of Siau, north of Sulawesi, is among the most active of Indonesia volcanoes. In late November increased seismicity was registered at Karangetang, white and brownish eruption plumes rose to an altitude of 1.8km and incandescent rockslides travelled up to 1km south and west of the main crater. There were further rockslides of incandescent materials on 1 and 2 December, along with projection of incandescent material from the main crater and the eruption of a plume to an altitude of 3km. On 2 December the alert level was raised to the second-highest alert level of orange, and today the volcanological authority has warned local inhabitants and tourists to be ready for further activity, and advised that no-one should climb the volcano above 500m above sea level.

Karangetang is a 1784m stratovolcano with a history of frequent exposive activity generating pyroclastic flows and lahars, and a tendency to grow lava domes in its five summit craters. It is a potentially dangerous volcano and needs careful watching, as its eruptive history shows.

News
Volcano spews hot ash in central Indonesia – GMA News, 4 December 2008

Information
Global Volcanism Program: Karangetang – information about Karangetang (0607-02=)
Direktorat Vulkanologi Indonesia – Directorate of Volcanology and Geological Hazard Mitigation, Indonesia
Pusat Vulkanologi & Mitigasi Bencana Geologi – News and information portal for the Directorate of Volcanology and Geological Hazard Mitigation, Indonesia

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