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SI/USGS Weekly Volcanic Activity Report, 5-11 January 2011 13 January 2011

Posted by admin in activity reports, Bulusan, Caribbean, Dukono, Ecuador, eruptions, Etna, Fuego, Guatemala, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kizimen, Manam, Merapi, Nicaragua, Pacaya, Reventador, Russia, Sakura-jima, San Cristóbal, Santa María, Shiveluch, Soufrière Hills, Suwanose-jima, Tungurahua, United States, Weekly Volcanic Activity Reports.
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Here is the Weekly Volcanic Activity Report covering 5 to 11 January 2010, issued by the Smithsonian Institution and United States Geological Survey and compiled by Sally Kuhn Sennert. Some selected highlights:

  • Etna: still restless, with weak emissions, strombolian activity and degassing
  • Kizimen: eruptive activity continues with continuous emissions to 6-8 km a.s.l. and ashfall
  • Fuego: explosions, incandescence, ash plumes and ashfall
  • Merapi: lahars cause floods and damage on Merapi’s flanks

The maps accompanying this report will be available shortly – apologies for the delay.

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 5-11 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).

Ongoing activity: Bulusan (Philippines), Dukono (Indonesia), Fuego (Guatemala), Karymsky (Russia), Kilauea (Hawaii, USA), Merapi (Indonesia), Pacaya (Guatemala), Reventador (Ecuador), Sakura-jima (Japan), San Cristóbal (Nicaragua), Santa María (Guatemala), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan), Tungurahua (Ecuador).

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Merapi eruption update 5 November 2010

Posted by admin in activity reports, eruptions, Indonesia, Merapi, natural hazards, volcano monitoring, volcanoes.
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To my great regret I’ve only been able to run a minimalist blog recently and haven’t been able to cover the Merapi eruption up to now, but fortunately Erik Klemetti’s coverage of this dramatic and tragic event at the Eruptions blog (click here for ‘Merapi’ tagged posts) couldn’t be bettered.

The news from Indonesia today continues to be grim indeed. News reports say that a further eruption of Merapi, ‘the biggest so far’ according to Indonesian volcanologist Surono (quoted by AFP), took place just after midnight local time on Friday 5 November, although this may have been a dome collapse rather than a new eruptive event. Darwin VAAC reports emissions at FL550 (55,000 feet / 16,700 metres a.s.l.), with the plume extending 190 nautical miles (~350 km) to the west and south-west. Pyroclastic flows reached 13 km, and perhaps as far as 18 km, from the volcano’s summit, pushing at the limits of the exclusion zone as then in force and destroying villages on the slopes. Many more people have been killed: news reports give death tolls of around 50, with at least 70 critically injured. The total number of deaths in this eruption is now around 100. Ash fall occurred in the city of Yogyakarta, 30 km from Merapi, and the sound of the latest eruption was heard up to 20 km away. Flights from Yogyakarta airport have been disrupted again, after resuming briefly yesterday.

The exclusion zone around the volcano has now been extended to 20 km from the summit. Between 70,000 and 100,000 people have fled the area around the volcano, stretching Indonesia’s emergency resources to the limit. But tribute must be paid to Indonesia’s volcanologists and emergency officials, who have been providing all the information and warnings they can about this eruption as rapidly and effectively as possible throughout. Their warnings have not always been heeded, sadly. Information from the Volcanological Survey of Indonesia about the ongoing activity at Merapi (in Indonesian) can currently be found here.

News
Indonesian volcano claims another 49 lives – AFP, 5 November 2010
Death toll from Indonesian volcano nears 100Times of India, 5 November 2010
Dozens die in new Mount Merapi eruption in Indonesia – BBC News, 5 November 2010
Deaths from Indonesian volcano wrath near 100 – GMANews.TV, 5 November 2010
Death toll from Indonesian volcano tops 100 – ABC News, 5 November 2010

Information
Global Volcanism Program: Merapi – summary information for Merapi (0603-25=)
Volcanological Survey of Indonesia – News and information portal for the Volcanological Survey of Indonesia

The Volcanism Blog

SI/USGS Weekly Volcanic Activity Report, 27 October – 2 November 2010 4 November 2010

Posted by admin in activity reports, Chile, Colima, Dukono, Ecuador, eruptions, Eyjafjöll, Fuego, Guatemala, Hawaii, Iceland, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Krakatau, Manam, Merapi, Pacific, Pagan, Papua New Guinea, Piton de la Fournaise, Planchón-Peteroa, Russia, Sakura-jima, Sangay, Santa María, Shiveluch, United States, Villarrica, Weekly Volcanic Activity Reports.
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The Weekly Volcanic Activity Report for 27 October to 2 November 2010 is compiled by Sally Kuhn Sennert and published by the Global Volcanism Program. Some selected highlights:

  • Kliuchevskoi: ash plumes to 8-9 km altitude causing flight diversions
  • Merapi: eruption continues with pyroclastic flows, plumes to more than 6 km altitude, ashfall
  • Piton de la Fournaise: eruption continues, an active lava lake observed
  • Eyjafjallajökull: the 2010 eruption is officially over, says scientist

SI/USGS Weekly Volcanic Activity Report 27 October - 2 November 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 27 October – 2 November 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: Colima (Mexico), Kliuchevskoi (Russia), Krakatau (Indonesia), Merapi (Indonesia), Piton de la Fournaise (Réunion Island), Planchón-Peteroa (Chile), Shiveluch (Russia).

Ongoing activity: Dukono (Indonesia), Eyjafjallajökull (Iceland), Fuego (Guatemala), Karymsky (Russia), Kilauea (Hawaii, USA), Manam (Papua New Guinea), Pagan (Mariana Islands), Sakura-jima (Japan), Sangay (Ecuador), Santa María (Guatemala), Villarrica (Chile).

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SI/USGS Weekly Volcanic Activity Report, 20-26 October 2010 29 October 2010

Posted by admin in activity reports, Chaitén, Chile, eruptions, Fuego, Guatemala, Hawaii, Indian Ocean, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Manam, Merapi, Pacaya, Papua New Guinea, Piton de la Fournaise, Russia, Sakura-jima, Santa María, Shiveluch, Suwanose-jima, United States, Villarrica, Weekly Volcanic Activity Reports.
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The Weekly Volcanic Activity Report for 20-26 October 2010 is compiled by Sally Kuhn Kennert and published by the Global Volcanism Program. It’s been a volcanically lively week. Some selected highlights:

  • Kliuchevskoi: explosive activity
  • Merapi: an explosive eruption brings evacuations and fatalities
  • Piton de la Fournaise: eruptive activity continues

SI/USGS Weekly Volcanic Activity Report 20-26 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 20-26 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: Kliuchevskoi (Russia), Merapi (Indonesia), Piton de la Fournaise (Réunion Island).

Ongoing activity: Chaitén (Chile), Fuego (Guatemala), Karymsky (Russia), Kilauea (Hawaii, USA), Manam (Papua New Guinea), Pacaya (Guatemala), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Suwanose-jima (Japan), Villarrica (Chile).

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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