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Smithsonian / USGS Weekly Volcanic Activity Report

You are currently viewing Archived reports for the week of 12 January-18 January 2005.


















 Activity for the week of 12 January-18 January 2005

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
Anatahan Mariana Islands (USA) New
Klyuchevskoy Central Kamchatka (Russia) New
Veniaminof United States New

Bezymianny Central Kamchatka (Russia) Ongoing
Colima Mexico Ongoing
Kilauea Hawaiian Islands (USA) Ongoing
Manam Papua New Guinea Ongoing
Reventador Ecuador Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Spurr United States Ongoing
St. Helens United States Ongoing
Tungurahua Ecuador Ongoing


New Activity / Unrest


Volcano index photo  Anatahan  | Mariana Islands (USA)  | 16.35°N, 145.67°E  | Elevation 790 m

During 9-14 January, the eruption of Anatahan volcano stabilized, as explosion signals became larger and generally less frequent than previously observed, averaging a few explosions per minute. Early on 16 January, the eruption suddenly stopped for a couple of hours, then the level of instrumentally recorded activity surged to a new high 50 percent above the previous high. Later on 16 January, the eruption declined slowly for several hours before it stopped again, this time for about 8 hours before it returned to the level of 9-14 January. Early on 18 January, the activity level again surged to its second highest level so far. Then around 1000 activity declined to the level of 9-14 January.

With the current high level of eruptive activity, ash could be in the air out to a few tens of kilometers from Anatahan. The Emergency Management Office has placed Anatahan Island off limits until further notice and concludes that, although the volcano is not currently dangerous to most aircraft, conditions may change rapidly, and aircraft should pass upwind of Anatahan or farther than 100 km downwind from the island and otherwise exercise due caution within 50 km of Anatahan.

Source: Emergency Management Office of the Commonwealth of the Mariana Islands and United States Geological Survey Volcano Hazards Program



Volcano index photo  Klyuchevskoy  | Central Kamchatka (Russia)  | 56.056°N, 160.642°E  | Elevation 4754 m

KVERT raised the Concern Color Code at Kliuchevskoi from Green to Yellow on 14 January as seismic activity at the volcano increased. On 12 January, around 21 shallow earthquakes of M=1.0-1.7 and weak volcanic tremor were recorded. According to visual observations, weak gas-and-steam plumes were noted during 6-8 and 12 January. The plumes extended E from the volcano on 7 January and SW for 5 km from the volcano on 12 January.

KVERT again raised the Concern Color Code from Yellow to Orange as seismic activity increased significantly. During 13-14 January, 15 shallow earthquakes of M > 1.25 were recorded, along with an increase in the amplitude of volcanic tremor. Visual observations on 14 January noted a weak gas-and-steam plume that extended N from the volcano. Satellite data showed a bright thermal anomaly over the summit on 15 January.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Veniaminof  | United States  | 56.17°N, 159.38°W  | Elevation 2507 m

On 12 January the Anchorage VAAC reported emission of a thin ash cloud, visible on the Perryville NetCam, that rose between 3-4 km a.s.l., extended ENE, and dissipated within ~55 km of the volcano.

On 14 January, a satellite image showed a thermal anomaly in the vicinity of the Veniaminof's summit. Although the anomaly appeared less intense than when first detected on 8 January and volcanic activity seemed to have declined significantly since 12 January, activity still remained significantly higher than normal with occasional bursts of volcanic tremor. Therefore, Veniaminof remained at Concern Color Code Orange.

Sources: US Geological Survey Alaska Volcano Observatory (AVO), Anchorage Volcanic Ash Advisory Center (VAAC)



Ongoing Activity


Volcano index photo  Bezymianny  | Central Kamchatka (Russia)  | 55.972°N, 160.595°E  | Elevation 2882 m

KVERT lowered the Concern Color Code at Bezymianny from Red (the highest level) to Orange on 12 January when seismic activity returned to background levels following the eruption of 11 January. As seismicity remained at background levels, the Concern Color Code was lowered on 14 January from Orange to Yellow.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Colima  | Mexico  | 19.514°N, 103.62°W  | Elevation 3850 m

According to the Washington VAAC, during 12-18 January small eruptions from Colima generated steam-and-ash plumes. These plumes rose as high as ~6.7 km a.s.l. and extended as far as ~50 km from the volcano.

Source: Washington Volcanic Ash Advisory Center (VAAC)



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

During 12-18 January, surface lava flows were visible at Kilauea along the arms of the PKK lava flow on the Pulama pali fault scarp. No lava was visible near the coastline. Summit seismicity remained low with only a few long-period earthquakes recorded per day, and weak-to-absent background tremor. At Pu`u `O`o cone, volcanic tremor remained at moderate levels. Pu`u `O`o exhibited periods of slight inflation and deflation during the report period.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)



Volcano index photo  Manam  | Papua New Guinea  | 4.08°S, 145.037°E  | Elevation 1807 m

During 12-18 January, the Darwin VAAC, based on information from RVO, reported that Manam was at Alert Level 2 and continued to produce variable emissions.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Reventador  | Ecuador  | 0.077°S, 77.656°W  | Elevation 3562 m

On 14 January at 0700, the Washington VAAC reported that an ash plume was observed at Reventador. The plume rose to a height of ~4.5 km a.s.l. On 16 January at 0430, satellite imagery indicated a brief emission of steam and very light ash that rose to ~6 km a.s.l. and moved E.

Source: Washington Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Sheveluch  | Central Kamchatka (Russia)  | 56.653°N, 161.36°E  | Elevation 3283 m

During 8-14 January, seismicity decreased slightly at Shiveluch but remained above background levels. Seismicity indicated that from 1815 to 1945 on 13 January, several ash explosions up to 5 km a.s.l. and a pyroclastic flow probably occurred. Possible weak ash-and-gas explosions and hot avalanches occurred during 8-14 January. According to visual observations and video data, gas-and-steam plumes rose up to ~2.5-3.4 km a.s.l. during 6-8 January and on 12 January. Shiveluch remained at Concern Color Code Orange.

The Tokyo VAAC reported an eruption of Shiveluch on 17 January at 1625 with a plume that rose to a height of ~4.5 km a.s.l.

Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Spurr  | United States  | 61.299°N, 152.251°W  | Elevation 3374 m

Elevated levels of seismicity continued to be recorded at Spurr during 8-14 January. Seismic event rates averaged six located earthquakes per day. No activity was observed in satellite and web camera images during 8-14 January.

Source: US Geological Survey Alaska Volcano Observatory (AVO)



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

Lava-dome growth continued at St. Helens during 12-18 January. Seismicity continued at a very low level. A large slab on the west side of the dome collapsed and generated a small rock avalanche and ash cloud that drifted over the south crater rim. A bright glow on the VolcanoCam seen the night of 13 January was likely caused by this event.

New instrumentation packages installed on and near the new lava dome on 14 January, including a video camera, gas sensor, GPS, and seismometer, stopped transmitting data early on 16 January. Analysis of seismic and other data from about 0300 on 16 January, when two instruments on and near the new dome ceased functioning, suggests that a steam and ash emission occurred, perhaps accompanied by ejection of ballistic fragments. The event lasted about 18 minutes. During that time radio-telemetry signals from a few other instruments in the crater were interrupted temporarily, probably as the result of ash in the air. In the 24 hours prior to the event, the GPS on the north end of the new dome moved southward and upward more than 8 m, showing that dome extrusion continues at a vigorous pace. St. Helens remained at Volcano Advisory (Alert Level 2); aviation color code Orange.

Source: US Geological Survey Cascades Volcano Observatory (CVO)



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

Seismicity remained low at Tungurahua during 12-18 January with few to several long period events each day. On 14 January, a white column of steam-and-gas was observed that reached a height of 500 m above the crater and extended to the NW. On 16 January, a steam-and-gas plume reached a height of 200-300 m above the crater and extended SE. Incandescence was observed emanating from the crater during 12-13 January.

On 18 January, the Washington VAAC reported an ash plume that reached a height of ~5.5 km a.s.l. and extended to the E of Tungurahua's summit for ~15 km.

Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)



Weekly Reports Archive

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Copahue Kick 'em Jenny Peuet Sague Tolbachik
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Cuicocha Kilauea Planchon-Peteroa Tongariro
Cumbal Kirishimayama Poas Tungurahua
Dabbahu Kizimen Popocatepetl Turrialba
Dempo Klyuchevskoy Puyehue-Cordon Caulle Ubinas
Descabezado Grande Kolokol Group Rabaul Ulawun
Dieng Volcanic Complex Korovin Ranakah Unknown Source
Dukono Koryaksky Raoul Island Unnamed
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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.

5. USGS Disclaimer Statement for this Website:

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.

Some of the documents on this server may contain live references (or pointers) to information created and maintained by other organizations. Please note that USGS does not control and cannot guarantee the relevance, timeliness, or accuracy of these outside materials.

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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)