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Smithsonian / USGS Weekly Volcanic Activity Report

You are currently viewing Archived reports for the week of 22 November-28 November 2006.


















 Activity for the week of 22 November-28 November 2006

The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program. Updated by 2300 UTC every Wednesday, notices of volcanic activity posted on these pages are preliminary and subject to change as events are studied in more detail. This is not a comprehensive list of all of Earth's volcanoes erupting during the week, but rather a summary of activity at volcanoes that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed reports on various volcanoes are published monthly in the Bulletin of the Global Volcanism Network.

Name Location Activity
Nyamuragira DR Congo New
Taal Luzon (Philippines) New

Aira Kyushu (Japan) Ongoing
Bagana Bougainville (Papua New Guinea) Ongoing
Barren Island Andaman Islands (India) Ongoing
Etna Sicily (Italy) Ongoing
Karangetang Siau Island (Indonesia) Ongoing
Karymsky Eastern Kamchatka (Russia) Ongoing
Kilauea Hawaiian Islands (USA) Ongoing
Langila New Britain (Papua New Guinea) Ongoing
Rabaul New Britain (Papua New Guinea) Ongoing
Sangay Ecuador Ongoing
Semeru Eastern Java (Indonesia) Ongoing
Soufriere Hills Montserrat Ongoing
St. Helens United States Ongoing
Tungurahua Ecuador Ongoing
Ubinas Peru Ongoing
Ulawun New Britain (Papua New Guinea) Ongoing


New Activity / Unrest


Volcano index photo  Nyamuragira  | DR Congo  | 1.408°S, 29.2°E  | Elevation 3058 m

GVO reported that on 27 November at 2200, incandescence from a new eruption of Nyamuragira was visible from Goma, about 30 km S. The intense red glow suggested lava fountaining and flows. Sustained long-period earthquake activity had been present since 26 October.

Source: Observatoire Volcanologique de Goma (OVG)



Volcano index photo  Taal  | Luzon (Philippines)  | 14.002°N, 120.993°E  | Elevation 311 m

According to news articles, geysers of muddy water 3-5 m high occurred in the NNE portion of Taal's main crater during 17-21 November. On 24 November, a new episode of 50-cm-high geyser activity and increased seismicity prompted PHIVOLCS to raise the Alert Level from 1 to 2.

Sources: Associated Press, People's Daily Online (China)



Ongoing Activity


Volcano index photo  Aira  | Kyushu (Japan)  | 31.593°N, 130.657°E  | Elevation 1117 m

Based on information from JMA, the Tokyo VAAC reported that explosions from Sakura-jima on 22 November produced eruption plumes that reached an altitude of 2.1 km (7,000 ft) a.s.l. and drifted W. On 26 November, plumes reached an unreported altitude.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Bagana  | Bougainville (Papua New Guinea)  | 6.137°S, 155.196°E  | Elevation 1855 m

A diffuse plume from Bagana was visible on satellite imagery on 22 November. The height and direction of the plume were not reported.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Barren Island  | Andaman Islands (India)  | 12.278°N, 93.858°E  | Elevation 354 m

The Darwin VAAC reported that a diffuse plume from Barren Island was visible on satellite imagery on 27 November. The height and direction of the plume were not reported.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Etna  | Sicily (Italy)  | 37.748°N, 14.999°E  | Elevation 3295 m

INGV reported that a black ash plume from Etna rose above cloud cover to an altitude of 4.8 km (15,700 ft) a.s.l. on 21 November at about 1500. Light ashfall was reported from areas E and NE, including Rifugio Citelli (6 km NE of the SE Crater). After 1900, the cloud cover dissipated and the SE Crater came into view. Strombolian activity generated jets of material greater than 300 m high. Lava flowed down the SSE flanks and continued into 23 November. According to the Toulouse VAAC, mild eruption plumes were visible on an INGV webcam on 24 November. Due to the possible presence of ash plumes, the Fontanarossa airport in E Sicily closed from the evening of 24 November until early 28 November.

Sources: AGI News - Agenzia Giornalistica Italia, Sezione di Catania - Osservatorio Etneo (INGV), Toulouse Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Karangetang  | Siau Island (Indonesia)  | 2.781°N, 125.407°E  | Elevation 1797 m

According to the Darwin VAAC, an eruption at Karangetang on 24 November produced a small ash plume observed on satellite imagery that reached an altitude of 3 km (10,000 ft) a.s.l.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Karymsky  | Eastern Kamchatka (Russia)  | 54.049°N, 159.443°E  | Elevation 1513 m

Seismic data from Karymsky was available during 18-19 November. Seismicity was elevated above background levels and the number of shallow earthquakes was more than 90 per day. Explosions produced ash plumes that possibly reached altitudes of 2.5 km (8,200 ft) a.s.l. based on seismic data. A thermal anomaly in the crater was detected on 18-19 and 21-23 November. The Level of Concern Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Kilauea  | Hawaiian Islands (USA)  | 19.421°N, 155.287°W  | Elevation 1222 m

During 22-28 November, lava from Kilauea continued to flow off of a lava delta into the ocean at the East Lae'apuki and East Ka'ili'ili entries. During 23 and 25-26 November, incandescence was visible on the Pulama pali and the coastal flats in the vicinity of the Campout flow. Incandescence was intermittently visible from the East Pond and January vents, South Wall complex, and Drainhole vent in Pu'u 'O'o's crater.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)



Volcano index photo  Langila  | New Britain (Papua New Guinea)  | 5.525°S, 148.42°E  | Elevation 1330 m

During 21-26 November, eruptive activity at Langila's Crater 2 consisted of continuous emissions of gray ash plumes that rose to altitudes of 2.3-3.3 km (7,600-10,800 ft) a.s.l. and drifted predominantly W and NW. Fine ashfall was reported from areas downwind. Occasional roaring noises were heard accompanying emissions.

Source: Rabaul Volcano Observatory (RVO)



Volcano index photo  Rabaul  | New Britain (Papua New Guinea)  | 4.271°S, 152.203°E  | Elevation 688 m

RVO reported that during 20-23 November Rabaul emitted thick white vapor accompanied by minor gray ash clouds. On 21 November, emissions created a haze around the summit. On 22 and 23 November, plumes rose to about 1.7 km (5,600 ft) a.s.l. and drifted W and E, respectively. Fine ashfall was reported from areas downwind to the W.

Source: Rabaul Volcano Observatory (RVO)



Volcano index photo  Sangay  | Ecuador  | 2.005°S, 78.341°W  | Elevation 5286 m

According to the Washington VAAC, an eruption from Sangay on 22 November produced an ash plume observed on satellite imagery that drifted WNW.

Source: Washington Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Semeru  | Eastern Java (Indonesia)  | 8.108°S, 112.922°E  | Elevation 3657 m

Based on a pilot report, the Darwin VAAC reported that on 22 November an ash plume from Semeru reached 7.6 km (25,000 ft) a.s.l. and drifted S. On 24 November, CVGHM reported an eruption plume to an altitude of 4.4 km (14,000 ft) a.s.l. Incandescent material fell to the ground in all directions within a 200 m radius from the center of the plume.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Soufriere Hills  | Montserrat  | 16.72°N, 62.18°W  | Elevation 915 m

During 17-24 November, lava-dome growth at Soufrière Hills continued and was concentrated on the NE part of the edifice. Ash venting originated from the westernmost of two cracks in the curved back of the shear E-facing lobe on the summit. Rockfalls and small pyroclastic flows traveled down the SW and NE flanks. Pyroclastic flows reached both the upper region of Tuitts Ghaut (N) and the sea via the Tar River Valley (E) on 23 November. An explosion produced an ash plume that rose to altitudes of 1.5-1.7 km (4,900-5,600 ft) a.s.l.

Source: Montserrat Volcano Observatory (MVO)



Volcano index photo  St. Helens  | United States  | 46.2°N, 122.18°W  | Elevation 2549 m

Data from deformation-monitoring instruments showed that during 22-28 November the lava dome at Mount St. Helens continued to grow. Seismicity continued at low levels, punctuated by M 1.5-2.5 and occasionally larger earthquakes. Inclement weather prohibited visual observations during most of the reporting period.

Source: US Geological Survey Cascades Volcano Observatory (CVO)



Volcano index photo  Tungurahua  | Ecuador  | 1.467°S, 78.442°W  | Elevation 5023 m

IG reported that during 21-28 November, emissions from Tungurahua produced ash and steam plumes that reached altitudes of 6-9 km (19,700-29,500 ft) a.s.l. and drifted predominantly NW and W. Ashfall about 1 mm thick was reported from areas 8 km WSW on 21 November and from areas 8 km W on 25 November. During 26-27 November, Strombolian activity propelled incandescent material up to 600 m above the summit. Blocks rolled 2 km down the flanks. Lightning was visible in an ash plume that reached 7 km (23,000 ft) a.s.l. and ashfall was reported from areas 8 km WSW. On 27 November, an ash plume rose to 9 km (29,500 ft) a.s.l. and drifted W.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)



Volcano index photo  Ubinas  | Peru  | 16.355°S, 70.903°W  | Elevation 5672 m

Based on pilot reports, the Buenos Aires VAAC reported continuous emissions from Ubinas on 25 November. Ash plumes rose to 5.5 km (18,000 ft) a.s.l.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Ulawun  | New Britain (Papua New Guinea)  | 5.05°S, 151.33°E  | Elevation 2334 m

Based on satellite imagery, the Darwin VAAC reported a diffuse plume from Ulawun on 22 November and an ash-and-steam plume on 28 November.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



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Dieng Volcanic Complex Koryaksky Raikoke Unknown Source
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 News Feeds and Google Placemarks


The RSS (Really Simple Syndication) feed is identical to the Weekly Volcanic Activity Report minus some features including the header information (latitude and longitude and summit elevation), the Geologic Summary, and a link to the volcano's page from the Global Volcanism Program. Each volcano report includes a link from the volcano's name back to the more complete information in the Weekly Volcanic Activity Report on the Smithsonian website.




The CAP (Common Alerting Protocol) feeds are XML files specifically formatted for disaster management. They are similar in content to the RSS feed, but contain no active links.




A Google Earth network link for the Weekly Volcanic Activity Report can be loaded into the free Google Earth software, and in turn will load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano page for that volcano and to the complete Weekly Report for that week.

 Criteria & Disclaimers

Criteria

The Weekly Volcanic Activity Report does not necessarily include all volcanic activity that occurred on Earth during the week. More than a dozen volcanoes globally have displayed more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. The Weekly Volcanic Activity Report summarizes volcanic activity that meets one or more of the following criteria:

- A volcano observatory raises or lowers the alert level at the volcano.
- A volcanic ash advisory has been released by a volcanic ash advisory center (VAAC) stating that an ash cloud has been produced from the volcano.
- A verifiable news report of new activity or a change in activity at the volcano has been issued.
- Observers have reported a significant change in volcanic activity. Such activity can include, but is not restricted to, pyroclastic flows, lahars, lava flows, dome collapse, or increased unrest.

Volcanoes are included in the "New Activity/Unrest" section of the Weekly Volcanic Activity Report if the activity occurs after at least 3 months of quiescence. Once a volcano is included in the "New Activity/Unrest" section, updates will remain in that section unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Continuing Activity" section. Volcanoes are also included in the "New Activity/Unrest" section if the volcano is undergoing a period of relatively high unrest, or increasing unrest. This is commonly equal to Alert Level Orange on a scale of Green, Yellow, Orange, Red, where Red is the highest alert. Or alert level 3 on a scale of 1-4 or 1-5.

It is important to note that volcanic activity meeting one or more of these criteria may occur during the week, but may not be included in the Weekly Volcanic Activity Report because we did not receive a report.


Disclaimers

1. The Weekly Volcanic Activity Report is intended to provide timely information about global volcanism on a weekly basis. Consequently, the report is generated rapidly by summarizing volcanic reports from various sources, with little time for fact checking. The accuracy of the Weekly Volcanic Activity Report is dependent upon the quality of the volcanic activity reports we receive. Reports published in the Bulletin of the Global Volcanism Network are monthly, and more carefully reviewed, although all of the volcanoes discussed in the Weekly Volcanic Activity Report are not necessarily reported in the Bulletin. Because of our emphasis on rapid reporting on the web we have avoided diacritical marks. Reports are updated on the Weekly Volcanic Activity Report web page as they are received, therefore information may be included regarding events that occurred before the current report period.

2. Rapidly developing events lead to coverage that is often fragmentary. Volcanoes, their eruptions, and their plumes and associated atmospheric effects are complex phenomena that may require months to years of data analysis in order to create a comprehensive summary and interpretation of events.

3. Preliminary accounts sometimes contain exaggerations and "false alarms," and accordingly, this report may include some events ultimately found to be erroneous or misleading.

4. Many news agencies do not archive the articles they post on the Internet, and therefore the links to some sources may not be active. To obtain information about the cited articles that are no longer available on the Internet contact the source.

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Information presented on this website is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credit is requested. We strongly recommend that USGS data be acquired directly from a USGS server and not through other sources that may change the data in some way. While USGS makes every effort to provide accurate and complete information, various data such as names, telephone numbers, etc. may change prior to updating. USGS welcomes suggestions on how to improve our home page and correct errors. USGS provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of furnished data.

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RSS and CAP Feeds

An RSS (Really Simple Syndication) feed for the Weekly Volcanic Activity Report first made available on 5 March 2008 can be utilized with the aid of various free downloadable readers. The report content of the news feed is identical to the Weekly Volcanic Activity Report minus some features including the header information (latitude and longitude and summit elevation), the Geologic Summary, and a link to the volcano's page from the Global Volcanism Program. Each volcano report includes a link from the volcano's name back to the more complete information in the Weekly Volcanic Activity Report on the Smithsonian website. On 12 March 2009, GeoRSS tags were added so that the latitude and longitude for each volcano could be included with the feed.

At the end of each individual report is a list of the sources used. We would like to emphasize that the World Organization of Volcano Observatories (WOVO) website (http://www.wovo.org/) lists the regional volcano observatories that have the most authoritative data for many of these events.

CAP (Common Alerting Protocol) feeds are XML files specifically formatted for disaster management.


Google Earth Placemarks

A Google Earth network link for the Weekly Volcanic Activity Report was first made available on 1 April 2009. This file can be loaded into the free Google Earth software, and in turn will load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano page for that volcano and to the complete Weekly Report for that week.

 Acronyms and Abbreviations

a.s.l. - above sea level

AVO - Alaska Volcano Observatory

AVHRR - Advanced Very High Resolution Radiometer

CENAPRED - Centro Nacionale de Prevencion de Desastres (México)

CONRED - Coordinadora Nacional para la Reducción de Desastres

COSPEC - Correlation Spectrometer

CVGHM (formerly VSI) - Center of Volcanology and Geological Hazard Mitigation

CVO - Cascades Volcano Observatory (USGS)

GMS - Geostationary Meteorological Satellite

GOES - Geostationary Operational Environmental Satellite

GVO - Goma Volcano Observatory

GVP - Global Volcanism Program (Smithsonian Institution)

HVO - Hawaiian Volcano Observatory (USGS)

ICE - Instituto Costarricense de Electricidad (Costa Rica)

IG - Instituto Geofísico (Ecuador)

IGNS - Institute of Geological and Nuclear Sciences (New Zealand) - now GNS Science

INETER - Instituto Nicaragüense de Estudios Territoriales (Nicaragua)

INGEMMET - Instituto Geológical Minero y Metalúrgico (Peru)

INGEOMINAS - Instituto Colombiano de Geología y Minería (Colombia)

INGV-CT - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania (Italy)

INSIVUMEH - Instituto Nacional de Sismologia, Vulcanologia, Meteorologia e Hidrologia (Guatemala)

IRD - Institut de Recherche pour le Développement (France)

JMA - Japanese Meteorological Agency

KEMSD - Kamchatkan Experimental and Methodical Seismilogical Department

KVERT - Kamchatkan Volcanic Eruption Response Team

M - magnitude

METEOSAT - Meteorological Satellite

MEVO - Mount Erebus Volcano Observatory

MODIS - Moderate Resolution Imaging Spectroradiometer

MVO - Montserrat Volcano Observatory

MWO - Meteorological Watch Office

NEIC - National Earthquake Information Center

NIED - National Research Institute for Earth Science and Disaster Prevention (Japan)

NOAA - National Oceanic and Atmospheric Administration

NOTAM - Notice to Airmen

OVDAS - Observatorio Volcanologico de los Andes del Sur (Chile)

OFDA - Office of US Foreign Disaster Assistance

ONEMI - Oficina Nacional de Emergencia - Ministerio del Interior (Chile)

OVPDLF - Observatoire Volcanologique du Piton de la Fournaise (France)

OVSICORI-UNA - Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (Costa Rica)

PHIVOLCS - Philippine Institute of Volcanology and Seismology (Philippines)

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geologia y Mineria (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Russia)

USAID - US Agency for International Development

USGS - United States Geological Survey

UTC - Coordinated Universal Time

VAAC - Volcanic Ash Advisory Center

VAFTAD - Volcanic Ash Forecast Transport And Dispersion

VDAP - Volcano Disaster Assistance Program (USGS)

VHP - Volcano Hazards Program (USGS)

VRC - Volcano Research Center (Japan)