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Smithsonian / USGS Weekly Volcanic Activity Report

You are currently viewing Archived reports for the week of 29 May-4 June 2019.


















 Activity for the week of 29 May-4 June 2019

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
Colima Mexico New
Etna Sicily (Italy) New
Great Sitkin Andreanof Islands (USA) New
Kurikomayama Honshu (Japan) New
Midagahara Honshu (Japan) New
Sinabung Indonesia New

Agung Bali (Indonesia) Ongoing
Aira Kyushu (Japan) Ongoing
Asosan Kyushu (Japan) Ongoing
Dukono Halmahera (Indonesia) Ongoing
Ebeko Paramushir Island (Russia) Ongoing
Ibu Halmahera (Indonesia) Ongoing
Karymsky Eastern Kamchatka (Russia) Ongoing
Klyuchevskoy Central Kamchatka (Russia) Ongoing
Krakatau Indonesia Ongoing
Merapi Central Java (Indonesia) Ongoing
Poas Costa Rica Ongoing
Santa Maria Guatemala Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Suwanosejima Ryukyu Islands (Japan) Ongoing


New Activity / Unrest


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

Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima reported that during 25-31 May small explosions and intermittent steam-and-gas emissions mainly from the NE side of the crater continued to be recorded. During overflights conducted during 23-24 May scientists observed that the new feature (a crack or cavity) reported the previous week had become a hole due to the combination of excavation due to explosions and probable subsidence. The maximum temperature recorded with a portable thermal camera was 252 degrees Celsius, an increase of 80 degrees since recorded on 1 May.

Source: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima



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

INGV reported that at 0220 on 30 May a fissure opened at the N base of Etna’s NSEC at about 3,150 m elevation. The fissure produced Strombolian explosions and a lava flow that advanced towards the W wall of the Valle del Bove; by 0915 it had reached 2,050 m elevation near Monte Simone. The flow was 2 km in length. Two fissures opened a few hours later at the SE base of NSEC at an elevation of about 3,050 m, each producing lava flows that converged and traveled along the W wall of the Valle del Bove towards Serra Giannicola Grande, partially covering the 2018 lava flows. The flow reached 2,260 m elevation by 0915. The fissure activity was accompanied by ash emissions which were intense starting at 1150 but then decreased and almost stopped late in the evening. The lava flow reached the bottom of the valley in the early hours of 31 May and had a length of about 3 km.

INGV volcanologists confirmed that lava continued to effuse from both fissures during a visual inspection in the morning of 1 June and that vigorous spatter was occurring at a fissure on the SE base of NSEC. By 1930 the lava flow from the N base was no longer being fed and was cooling. During a visual inspection of the eruption site on 2 June volcanologists confirmed explosive activity at a fissure segment at 2,850 m and continuing lava effusion. The lava traveled along the W wall of the Valle del Bove, overlapping flows from previous days.

Source: Sezione di Catania - Osservatorio Etneo (INGV)



Volcano index photo  Great Sitkin  | Andreanof Islands (USA)  | 52.076°N, 176.13°W  | Elevation 1740 m

A small steam explosion at Great Sitkin was detected in seismic data at 2140 on 1 June, prompting AVO to raise the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. Low-level seismic activity was elevated just before and after the event.

Source: US Geological Survey Alaska Volcano Observatory (AVO)



Volcano index photo  Kurikomayama  | Honshu (Japan)  | 38.961°N, 140.788°E  | Elevation 1627 m

JMA raised the Alert Level for Kurikomayama to 1 (the lowest level on a 5-level scale) on 30 May due to an undescribed potential for increased activity at the crater.

Source: Japan Meteorological Agency (JMA)



Volcano index photo  Midagahara  | Honshu (Japan)  | 36.571°N, 137.59°E  | Elevation 2621 m

JMA raised the Alert Level for Midagahara to 1 (the lowest level on a 5-level scale) on 30 May due to an undescribed potential for increased activity at the crater.

Source: Japan Meteorological Agency (JMA)



Volcano index photo  Sinabung  | Indonesia  | 3.17°N, 98.392°E  | Elevation 2460 m

PVMBG reported that white plumes from Sinabung rose as high as 500 m above the summit during 31 May-4 June. The Alert Level remained at 3 (on a scale of 1-4), with a general exclusion zone of 3 km and extensions to 5 km on the SE sector and 4 km in the NE sector.

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



Ongoing Activity


Volcano index photo  Agung  | Bali (Indonesia)  | 8.343°S, 115.508°E  | Elevation 2997 m

PVMBG reported that at 1142 on 31 May an explosion at Agung produced a dense gray ash plume that rose 2 km and drifted NE and E. Roaring was audible from the Agung Volcano Observatory in Rendang (about 8 km SW). The Alert Level remained at 3 (on a scale of 1-4) with the exclusion zone set at a 4-km radius.

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



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

JMA reported that during 27 May-3 June very small eruptive events at Minamidake crater (at Aira Caldera’s Sakurajima volcano) were recorded as well as periodic crater incandescence. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)



Volcano index photo  Asosan  | Kyushu (Japan)  | 32.884°N, 131.104°E  | Elevation 1592 m

JMA reported that very small eruptive events at Asosan’s Nakadake Crater on 29 and 31 May generated plumes that rose 400 m above the crater rim and, according to the Tokyo VAAC, drifted S and N, respectively. Sulfur dioxide emissions continued to be high at 2,000 tons per day. The Alert Level remained at 2 (on a scale of 1-5).

Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Dukono  | Halmahera (Indonesia)  | 1.693°N, 127.894°E  | Elevation 1229 m

Based on satellite and wind model data, and notices from PVMBG, the Darwin VAAC reported that during 29 May-4 June ash plumes from Dukono rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted NW and W. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

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



Volcano index photo  Ebeko  | Paramushir Island (Russia)  | 50.686°N, 156.014°E  | Elevation 1103 m

Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 25-28 May that sent ash plumes up to 3 km (10,000 ft) a.s.l. A thermal anomaly over the volcano was identified during 27-28 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Ibu  | Halmahera (Indonesia)  | 1.488°N, 127.63°E  | Elevation 1325 m

The Darwin VAAC reported that on 31 May multiple ash plumes from Ibu rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted W based on satellite data. On 2 June ash plumes rose to an altitude of 3 (10,000 ft) a.s.l. and drifted W. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

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



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

KVERT reported that an ash plume from Karymsky was identified in satellite images drifting 45 km NE on 24 May and a thermal anomaly was visible during 28-29 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



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

KVERT reported that ash plumes from Klyuchevskoy were last observed on 22 April and a weak thermal anomaly was last identified on 15 May. KVERT lowered the Aviation Color Code to Yellow (the second lowest level on a four-color scale) on 31 May.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Krakatau  | Indonesia  | 6.102°S, 105.423°E  | Elevation 813 m

PVMBG reported that Anak Krakatau’s seismic network detected two eruptive events on 29 May and two events on 2 June. None of the events were followed by visible ash emissions, though observations were hindered by weather conditions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km radius hazard zone from the crater.

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



Volcano index photo  Merapi  | Central Java (Indonesia)  | 7.54°S, 110.446°E  | Elevation 2910 m

PVMBG reported that during 24-30 May the lava-dome volume at Merapi did not change and was an estimated 458,000 cubic meters, based on analyses of drone footage. Extruded lava fell into the upper parts of the SE flank, generating one block-and-ash flow that traveled 1.1 km down the Gendol drainage. White plumes rose as high as 400 m above the summit. A news article stated that block-and-ash flows descended the Gendol drainage during 1-2 June, traveling as far as 1.2 km. In addition, incandescent dome material traveled 750 m on 2 June. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to remain outside of the 3-km exclusion zone.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), D News Radio



Volcano index photo  Poas  | Costa Rica  | 10.2°N, 84.233°W  | Elevation 2708 m

OVSICORI-UNA reported that multiple phreatic eruptions at Poás recorded during 29 May-1 June produced plumes that rose as high as 500 m above the vent.

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



Volcano index photo  Santa Maria  | Guatemala  | 14.757°N, 91.552°W  | Elevation 3745 m

INSIVUMEH and CONRED reported that during 29-30 May lahars descended Santa María's San Isidro drainage (tributary of El Tambor), carrying blocks 1-3 m in diameter and tree trunks. The lahars were 20 m wide and 1.5 m deep; CONRED noted that the 29 May lahar was hot and had a sulfur odor. Explosions recorded during 30 May-4 June generated ash plumes that rose as high as 800 m above the crater and drifted E and SE. Avalanches of material descended the E and SE flanks.

Sources: Coordinadora Nacional para la Reducción de Desastres (CONRED), Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)



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

KVERT reported that a thermal anomaly over Sheveluch’s lava dome was identified daily in satellite images during 24-31 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Suwanosejima  | Ryukyu Islands (Japan)  | 29.638°N, 129.714°E  | Elevation 796 m

JMA reported that crater incandescence at Suwanosejima’s Ontake Crater was occasionally visible at night during 24-31 May. An eruption at 1629 on 30 May generated a plume that rose 1.1 km above the crater rim. The Alert Level remained at 2 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)



Weekly Reports Archive

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Cayambe Kanlaon Nyiragongo Talang
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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
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Chirpoi Kelut Paluweh Tengger Caldera
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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
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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)