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Smithsonian / USGS Weekly Volcanic Activity Report

You are currently viewing Archived reports for the week of 5 February-11 February 2003.


















 Activity for the week of 5 February-11 February 2003

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
Asamayama Honshu (Japan) New
Lokon-Empung Sulawesi (Indonesia) New
Tokachidake Hokkaido (Japan) New

Etna Sicily (Italy) Ongoing
Karangetang Siau Island (Indonesia) Ongoing
Kilauea Hawaiian Islands (USA) Ongoing
Klyuchevskoy Central Kamchatka (Russia) Ongoing
Popocatepetl Mexico Ongoing
Semeru Eastern Java (Indonesia) Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Soufriere Hills Montserrat Ongoing
Stromboli Aeolian Islands (Italy) Ongoing
Tungurahua Ecuador Ongoing
Veniaminof United States Ongoing


New Activity / Unrest


Volcano index photo  Asamayama  | Honshu (Japan)  | 36.406°N, 138.523°E  | Elevation 2568 m

According to VRC, a photographer noticed two continuous puffs of discolored "smoke" rising from the summit of Asama on 6 February around noon. JMA noted that a puff was recorded on video footage rising 300 m above the summit crater around 1202. A small amount of ash was deposited on snow near the rim of the summit crater. Tremor, related to the emission, started around 1201 and lasted about 40 seconds. Otherwise, seismicity was at background levels and had been for several months. In addition, the temperature of the crater bottom was rather low. The last reported ash eruption at Asama occurred in July 1990.

Source: Volcano Research Center-Earthquake Research Institute (University of Tokyo)



Volcano index photo  Lokon-Empung  | Sulawesi (Indonesia)  | 1.358°N, 124.792°E  | Elevation 1580 m

Starting at the beginning of the report week (3-9 February), there was an increase in seismicity and surface activity at Lokon-Empung in comparison to the previous week. There were more emission, and deep and shallow volcanic earthquakes and ash emissions. On 8 February at 0443 an ash explosion was accompanied by the ejection of incandescent volcanic material. A thick ash cloud rose to 1.4 km over the crater and 0.5-1 mm of ash was deposited S of the volcano in the villages of Kayau, Tara-tara I and II, and Woloan II and III. At this time the Alert Level was raised from 2 to 3 (on a scale of 1-4).

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)



Volcano index photo  Tokachidake  | Hokkaido (Japan)  | 43.418°N, 142.686°E  | Elevation 2077 m

According to a news report, on 8 February volcanic tremor occurred at Tokachi that lasted for 37 minutes. A Japan Meteorological Agency monitor did not see any emissions or other signs that an eruption had occurred.

Source: Associated Press



Ongoing Activity


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

INGV-CT reported that the Etna flank eruption that began on 27 October 2002 ended on 28 January 2003 after 3 months of activity. In January, lava flows and Strombolian explosions were confined to Etna's S flank at a 2,750-m-elevation vent. Lava flows emitted from this vent formed a fan, covering the previous lava-flow field. Strombolian activity from the 2,750-m-cinder cone significantly declined on 27 January and ended on 29 January. In addition, lava flows slowed down on the 27th and by the 29th were no longer fed and were cooling down. At the same time there was a significant decrease in SO2 emission to a minimum of 2,000 tons/day on 29 January. Volcanic-tremor amplitude also showed a marked decrease on 27 January. The end of the eruption was interpreted to occur on 28 January at 2240 when volcanic tremor decreased to background levels.

Source: Sezione di Catania - Osservatorio Etneo (INGV)



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

Volcanic activity at Karangetang during 3-9 February consisted of low-level ash clouds rising above South and North craters, incandescent glow extending to 50 m above South Crater, and booming noises that were heard at the observation post. On 6 February at 0027 an ash explosion produced a cloud to an unknown height that deposited ash in villages SW of the volcano, including Akesembeka, Tarurane, Tatahadeng, Bebali, and Salili. During the report week, there was a significant increase in volcanic and emission earthquakes in comparison to the previous week. Karangetang remained at Alert Level 3 (on a scale of 1-4).

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)



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

During 5-11 February at Kilauea, lava continued to enter the sea at the West Highcastle entry and surface lava flows traveled down the Pulama pali fault scarp. The Chain of Craters road, which provides access to a lava-viewing area, was closed due to a wildfire that was started by lava flows. Generally, the long-lasting swarm of long-period earthquakes and tremor at Kilauea's summit, which began last June, continued at low levels. On 9 and 10 February short, small, periods of deflation and inflation occurred at the Uwekahuna and Pu`u `O`o tiltmeters.

Sources: Associated Press, US Geological Survey Hawaiian Volcano Observatory (HVO)



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

Seismicity was slightly above background levels during 31 January to 7 February at Kliuchevskoi, with 16-39 earthquakes occurring each day, at depths of ~30 km. Continuous spasmodic volcanic tremor was registered during the report week, and gas-and-steam plumes rose to 1.3 km above the crater. The Concern Color Code remained at Yellow.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Popocatepetl  | Mexico  | 19.023°N, 98.622°W  | Elevation 5393 m

During 4-10 February, several moderate-sized emissions at Popocatépetl sent ash plumes to a height of ~2 km. On 4 February at 0459 a moderate dome-destruction explosion ejected incandescent volcanic material that fell as far as ~2 km down the volcano's flanks. On 5 and 6 February similar sized emissions occurred that were accompanied by episodes of low-amplitude harmonic tremor for up to 3 hours. According to CENAPRED, due to the remains of a lava dome inside the crater, there remained a significant chance of further explosive activity, ash emissions, and incandescent ejections around the crater.

Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), Washington Volcanic Ash Advisory Center (VAAC)



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

During 3-9 February, volcanic activity remained at high levels at Semeru, with ash plumes rising 300-400 m above the summit. On 7 February a pyroclastic flow traveled 2-4 km into the Besuk Bang River. Seismicity during the report period was dominated by 777 explosion events and 14 pyroclastic flows were recorded. Semeru remained at Alert Level 2 (on a scale of 1-4).

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)



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

During 31 January to 7 February, seismicity remained above background levels at Shiveluch and many shallow earthquakes were recorded. Intermittent volcanic spasmodic tremor occurred and gas-and-steam plumes rose to 1.5 km above the crater. Thermal anomalies were visible on satellite imagery. Shiveluch remained at Concern Color Code Yellow.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



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

Activity at Soufrière Hills remained at moderate levels during 31 January to 7 February. Growth of the lava dome was focused on a large, steep lobe directed to the NE. Continuous growth and failure of the lobe produced pyroclastic flows and rockfalls in Tuitt's Ghaut, White's Ghaut, and along the N side of the Tar River Valley. A small amount of rockfall material was directed W towards Fort Ghaut. SO2 emission rates were slightly lower than the previous week. The Washington VAAC stated that several low-level ash plumes were visible on satellite imagery.

Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Stromboli  | Aeolian Islands (Italy)  | 38.789°N, 15.213°E  | Elevation 924 m

INGV-CT reported that the effusive eruption that began at Stromboli on 28 December 2002, continued through 6 February 2003. Emission of lava occurred from a main vent located at 500 m elevation in the middle of the Sciara de Fuocco (a horseshoe-shaped scarp), within the scar left by the 30 December 2002 landslide. Another vent, located at 600 m elevation at the NE base of Crater 1, was active several times during the eruption. Slow, short lava flows were emitted from this vent for periods lasting a few hours to a few days. During peaks in effusion rate, aa lava flows reached the sea, causing phreatic explosions at the lava-flow front.

During a thermal survey from a helicopter on 12 January, arcuate cracks were seen around the S base of the volcano's summit craters. Other fractures, oriented NE-SW, cut through the craters. Collapse of the crater's bottom during early January significantly changed the morphology of the upper part of the volcano. Previously there had been three individual craters, but scientists saw that Crater 1 (NE) and 3 (SW) had joined together to form one elongate depression. Crater 2 (the middle crater) no longer existed. INGV-CT noted that no explosive activity had occurred at the summit craters since the start of the activity within the Sciara del Fuocco. News about the eruption (in Italian), thermal images, photos, and videos of the 30 December 2002 collapse event can be downloaded from the INGV-CT website.

Source: Sezione di Catania - Osservatorio Etneo (INGV)



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

Seismic and volcanic activity remained at relatively low levels at Tungurahua during 5-11 February, with emissions of steam, gas, and ash producing low-level plumes. Incandescence was visible in the crater during some evenings.

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



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

The elevated seismicity that began at Veniaminof in mid-December 2002 continued through 31 January to 7 February. Discrete seismic events occurred at rates up to 1 event per minute. AVO stated that at this level of seismic unrest, low-level steaming and minor ash emissions may occur at any time. No elevated surface temperatures, ash emissions, or ash deposits were noted on satellite images. The Concern Color Code remained at Yellow.

Source: US Geological Survey Alaska Volcano Observatory (AVO)



Weekly Reports Archive

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Banda Api Ibu Montagu Island Soufriere St. Vincent
Bardarbunga Ijen Moyorodake [Medvezhia] South Sarigan Seamount
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Batur Iliwerung Myojinsho St. Helens
Bezymianny Inielika Nabro Stromboli
Bogoslof Ioto Negra, Sierra Sulu Range
Brava Iya Negro, Cerro Sumbing
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Calbuco Kaba Nisyros Suwanosejima
Callaqui Kadovar Novarupta Taal
Cameroon Kambalny NW Rota-1 Tair, Jebel at
Campi Flegrei del Mar di Sicilia Kanaga Nyamuragira Takawangha
Cayambe Kanlaon Nyiragongo Talang
Cereme Karangetang Okataina Tambora
Chachadake [Tiatia] Karkar Okmok Tanaga
Chaiten Karthala Ontakesan Tandikat-Singgalang
Chiginagak Karymsky Oraefajokull Tangkoko-Duasudara
Chikurachki Kasatochi Osorno Tangkubanparahu
Chiles-Cerro Negro Katla Pacaya Tara, Batu
Chillan, Nevados de Kavachi Pagan Telica
Chirinkotan Kelimutu Palena Volcanic Group Tenerife
Chirpoi Kelut Paluweh Tengger Caldera
Cleveland Kerinci Panarea Three Sisters
Colima Ketoi Papandayan Tinakula
Colo Kharimkotan Parker Tofua
Concepcion Kick 'em Jenny Pavlof Tokachidake
Copahue Kikai Peuet Sague Tolbachik
Cotopaxi Kilauea Pinatubo Toliman
Cuicocha Kirishimayama Planchon-Peteroa Tongariro
Cumbal Kizimen Poas Tungurahua
Dabbahu Klyuchevskoy Popocatepetl Turrialba
Dempo Kolokol Group Puyehue-Cordon Caulle Ubinas
Descabezado Grande Korovin Rabaul Ulawun
Dieng Volcanic Complex Koryaksky Raikoke Unknown Source
Dukono Krakatau Ranakah Unnamed
Ebeko Krummel-Garbuna-Welcker Raoul Island Unnamed
Ebulobo Kuchinoerabujima Rasshua Veniaminof
Egon Kurikomayama Raung Villarrica
Ekarma Kusatsu-Shiranesan Redoubt West Mata
Epi Kverkfjoll Reventador White Island
Erebus Lamington Rincon de la Vieja Witori
Erta Ale Lamongan Rinjani Wolf
Etna Langila Ritter Island Yasur
Etorofu-Yakeyama [Grozny Group] Lanin Rotorua Zaozan
Eyjafjallajokull Lascar Ruang Zavodovski
Fernandina Lengai, Ol Doinyo Ruapehu Zhupanovsky
Fogo Leroboleng Ruiz, Nevado del Zubair Group
Fonualei Lewotobi Sabancaya
Fournaise, Piton de la Lewotolo Sakar
Fourpeaked Little Sitkin Salak
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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)