Logo link to homepage

Smithsonian / USGS Weekly Volcanic Activity Report

Weekly Volcanic Activity Map

You are currently viewing Archived reports for the week of 21 August-27 August 2019.


















 Activity for the week of 21 August-27 August 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
Asamayama Honshu (Japan) New
Shishaldin Fox Islands (USA) New
Stromboli Aeolian Islands (Italy) New
Tangkuban Parahu Western Java (Indonesia) New
Veniaminof United States New

Aira Kyushu (Japan) Ongoing
Asosan Kyushu (Japan) Ongoing
Dukono Halmahera (Indonesia) Ongoing
Ebeko Paramushir Island (Russia) Ongoing
Ibu Halmahera (Indonesia) Ongoing
Karangetang Siau Island (Indonesia) Ongoing
Karymsky Eastern Kamchatka (Russia) Ongoing
Klyuchevskoy Central Kamchatka (Russia) Ongoing
Krakatau Indonesia Ongoing
Merapi Central Java (Indonesia) Ongoing
Reventador Ecuador Ongoing
Sangeang Api Indonesia Ongoing
Semisopochnoi United States Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Suwanosejima Ryukyu Islands (Japan) Ongoing
Ubinas Peru Ongoing


New Activity / Unrest


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

JMA reported that at 1928 on 25 August a small eruption at Asamayama generated a grayish-white ash plume that rose 600 m above the crater rim and drifted E. Large blocks were also ejected from the crater. Minor ashfall was reported in Karuizawa Town, Nagano Prefecture, about 4 km E. The plume then turned white and continuous emissions rose 200 m during 25-26 August. The Alert Level remained at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)



Volcano index photo  Shishaldin  | Fox Islands (USA)  | 54.756°N, 163.97°W  | Elevation 2857 m

AVO reported that during 21-28 August continuous, low-level tremor at Shishaldin was recorded by the seismic network and elevated surface temperatures were often visible in satellite images. The spatter cone in the crater had grown and partially filled the summit crater. NOAA scientists took video of the eruption during an overflight on 17 August and noted repetitive minor explosive activity within the summit crater. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

Source: US Geological Survey Alaska Volcano Observatory (AVO)



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

INGV reported that a paroxysmal explosive event at Stromboli began at 1216 on 28 August with a series of explosions likely from the Area C-S (South Central crater area). The event of strongest intensity occurred at 1217, generating an ash plume that rose more than 2 km above the crater area and a pyroclastic flow that traveled down the Sciara del Fuoco and several hundred meters out to sea. The report noted a similarity in intensity of the eruption to the 3 July paroxysmal event based on the seismic data.

Source: Sezione di Catania - Osservatorio Etneo (INGV)



Volcano index photo  Tangkuban Parahu  | Western Java (Indonesia)  | 6.77°S, 107.6°E  | Elevation 2084 m

PVMBG reported that during 19-25 August phreatic events at Tangkubanparahu's Ratu Crater continued to produce sometimes dense gray-to-white plumes that rose as high as 200 m above the vent, and dense black ash plumes that rose as high as 180 m. Ashfall was localized around Ratu Crater. The seismic network recorded continuous tremor. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay 1.5 km away from the active crater.

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



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

AVO lowered the Volcano Alert Level to Normal for Veniaminof and the Aviation Color Code to Green on 25 August, noting that the volcano returned to background activity after low-level tremor was detected and a pilot saw steaming on 1 August.

Source: US Geological Survey Alaska Volcano Observatory (AVO)



Ongoing Activity


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

JMA reported that very small eruptive events at Minamidake crater (at Aira Caldera’s Sakurajima volcano) occasionally occurred during 19-26 August. 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 during 18-23 August ash plumes rose from Asosan and drifted N and NW. Crater incandescence was visible at night. An eruption recorded during 1130-1945 on 25 August generated ash plumes that drifted E. The sulfur dioxide emission rate was 1,800 tons per day on 21 August and remained high on 25 August. The Alert Level remained at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)



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

Based on satellite and wind model data, and information from PVMBG, the Darwin VAAC reported that during 21-27 August ash plumes from Dukono rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted mainly E, NE, N, and NW. 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.

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



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 17-23 August that sent ash plumes up to 3 km (10,000 ft) a.s.l. and drifted SE. A thermal anomaly was identified in satellite images on 16 August. 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

PVMBG reported that at 0704 on 22 August an ash plume from Ibu rose at least 800 m above the summit and drifted W. Seismicity was characterized by an explosion signal and earthquakes indicating rock avalanches. 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.

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



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

PVMBG reported that during 19-25 August lava continued to effuse from Karangetang’s Main Crater (S) and Dua Crater (N). Avalanches of incandescent material traveled 1-1.5 km SW down the Nanitu and Pangi drainages, as far as 2 km down a drainage W of Pangi, and as far as 1.8 km down the Sense drainage. Sometimes dense white plumes rose to 200 m above the summit. The Alert Level remained at 2 (on a scale of 1-4).

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



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

KVERT reported that ash plumes from Karymsky were visible in satellite images drifting 500 km SW during 20-22 August. Explosions on 21 August produced ash plumes that rose to 6 km (19,700 ft) a.s.l. A thermal anomaly over the volcano was visible during 21-22 August. 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 a weak thermal anomaly over Klyuchevskoy was visible in satellite images during 17-23 August. 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  Krakatau  | Indonesia  | 6.102°S, 105.423°E  | Elevation 155 m

PVMBG reported that Anak Krakatau’s seismic network recorded 27 eruptive events during 19-25 August. The events were not followed by visible ash emissions, even though there were favorable weather conditions for viewing. An eruption recorded by a summit webcam at 0755 on 22 August produced a white, gray, and black ash plume that rose 100-400 m from the crater rim and drifted N and NW. 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 19-25 August the lava-dome volume at Merapi did not change and was an estimated 461,000 cubic meters, based on analyses of drone images on 8 August. Extruded lava fell into the upper parts of the SE flank, generating block-and-ash flows that traveled as far as 1.9 km down the Gendol drainage: twice on 20 August, once each on 22 and 24 August, and 16 times during 25-27 August. At 1809 on 27 August a block-and-ash flow traveled 2 km. Diffuse white plumes rose as high as 350 m above the summit. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to stay outside of the 3-km exclusion zone.

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



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

IG reported that during 21-27 August seismic data from Reventador’s network indicated a high level of seismic activity, including explosions, long-period earthquakes, harmonic tremor, and signals indicating emissions. Weather often prevented views of the summit area, although during clear conditions ash-and-steam plumes were visible rising as high as 1 km above the crater rim and drifting W, NW, and N. Crater incandescence was periodically observed at night. Blocks were observed rolling 800 m down the flanks during 26-27 August.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)



Volcano index photo  Sangeang Api  | Indonesia  | 8.2°S, 119.07°E  | Elevation 1912 m

The Darwin VAAC reported that during 21-26 August intermittent ash plumes from Sangeang Api were identified in satellite images rising to 3 km (10,000 ft) a.s.l. and drifting W and WNW. The Alert Level remained at 2 (on a scale of 1-4).

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Semisopochnoi  | United States  | 51.93°N, 179.58°E  | Elevation 1221 m

AVO reported that during 17-23 August seismicity at Semisopochnoi remained elevated and was characterized by periods of continuous tremor and discrete low-frequency earthquakes; seismic data went offline starting sometime on 17 August, though was available by around 22 August. Ground-coupled airwaves, indicative of explosive activity, were sometimes recorded in seismic data; an infrasound signal was recorded during 23-24 August. Cloudy weather often prevented satellite views of the volcano, though a steam plume was visible on 18 August and sulfur dioxide emissions were detected during 21-22 August. The Volcano Alert Level remained at Watch and the Aviation Color Code remained at Orange.

Source: US Geological Survey Alaska Volcano Observatory (AVO)



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 17-23 August. 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

The Tokyo VAAC reported that on 26 August a plume from Suwanosejima was visible in satellite images rising to 2.1 km (7,000 ft) a.s.l. The Alert Level remained at 2 (on a 5-level scale).

Source: Tokyo Volcanic Ash Advisory Center (VAAC)



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

IGP reported that during 20-26 August blue-colored gas plumes from Ubinas rose above the crater and eight thermal anomalies were recorded by the MIROVA system. The number of seismic events was 1,736 (all under M 2.4), and there was an increase in the magnitude and number of hybrid and long-period events. Around 1030 on 26 August an ash emission rose to heights below 2 km above the crater rim. Continuous ash emissions on 27 August were recorded by satellite and webcam images drifting S and SW. The Alert Level remained at Orange (the second highest level on a four-color scale) and the public were warned to stay outside of a 15-km radius.

Source: Instituto Geofísico del Perú (IGP)



Weekly Reports Archive

Search by Date



Use the dropdowns to choose the year and week for archived Weekly Reports.

Use the dropdowns to choose the year and week for archived Weekly Reports.          



Search by Volcano



Agung Colo Hunga Tonga-Hunga Ha'apai Lewotobi Papandayan Sotara
Ahyi Concepcion Ibu Lewotolo Parker Soufriere Hills
Aira Copahue Ijen Little Sitkin Pavlof Soufriere St. Vincent
Akan Cotopaxi Iliamna Llaima Peuet Sague South Sarigan Seamount
Alaid Cuicocha Iliwerung Loihi Pinatubo Spurr
Alu-Dalafilla Cumbal Inielika Lokon-Empung Planchon-Peteroa St. Helens
Ambae Dabbahu Ioto Lopevi Poas Stromboli
Ambang Dempo Irazu Machin Popocatepetl Sulu Range
Ambrym Descabezado Grande Iya Makian Puyehue-Cordon Caulle Sumbing
Anatahan Dieng Volcanic Complex Izu-Torishima Makushin Rabaul Sundoro
Antillanca Volcanic Complex Dukono Jackson Segment Maly Semyachik Raikoke Suretamatai
Antuco Ebeko Kaba Manam Ranakah Suwanosejima
Apoyeque Ebulobo Kadovar Manda Hararo Raoul Island Taal
Arenal Egon Kambalny Marapi Rasshua Tair, Jebel at
Asamayama Ekarma Kanaga Maroa Raung Takawangha
Askja Epi Kanlaon Martin Redoubt Talang
Asosan Erebus Karangetang Masaya Reventador Tambora
Augustine Erta Ale Karkar Maule, Laguna del Reykjanes Tanaga
Avachinsky Etna Karthala Mauna Loa Rincon de la Vieja Tandikat-Singgalang
Awu Etorofu-Yakeyama [Grozny Group] Karymsky Mayon Rinjani Tangkoko-Duasudara
Axial Seamount Eyjafjallajokull Kasatochi McDonald Islands Ritter Island Tangkuban Parahu
Azul, Cerro Fernandina Katla Melimoyu Rotorua Tara, Batu
Azumayama Fogo Kavachi Merapi Ruang Telica
Bagana Fonualei Kelimutu Midagahara Ruapehu Tenerife
Balbi Fournaise, Piton de la Kelut Misti, El Ruiz, Nevado del Tengger Caldera
Bamus Fourpeaked Kerinci Miyakejima Sabancaya Three Sisters
Banda Api Fuego Ketoi Momotombo Sakar Tinakula
Bardarbunga Fujisan Kharimkotan Monowai Salak Tofua
Barren Island Fukutoku-Oka-no-Ba Kick 'em Jenny Montagu Island San Cristobal Tokachidake
Batur Galeras Kikai Moyorodake [Medvezhia] San Miguel Tolbachik
Bezymianny Galunggung Kilauea Mutnovsky San Vicente Toliman
Bogoslof Gamalama Kirishimayama Myojinsho Sangay Tongariro
Brava Gamkonora Kizimen Nabro Sangeang Api Tungurahua
Bristol Island Gaua Klyuchevskoy Negra, Sierra Santa Ana Turrialba
Bulusan Gorely Kolokol Group Negro, Cerro Santa Maria Ubinas
Calbuco Great Sitkin Korovin Nightingale Island Sarigan Ulawun
Callaqui Grimsvotn Koryaksky Nishinoshima Sarychev Peak Unnamed
Cameroon Guagua Pichincha Krakatau Nisyros Saunders Unnamed
Campi Flegrei del Mar di Sicilia Guallatiri Krummel-Garbuna-Welcker Novarupta Semeru Veniaminof
Cayambe Guntur Kuchinoerabujima NW Rota-1 Semisopochnoi Villarrica
Cereme Hachijojima Kurikomayama Nyamuragira Seulawah Agam West Mata
Chachadake [Tiatia] Hakoneyama Kusatsu-Shiranesan Nyiragongo Sheveluch Whakaari/White Island
Chaiten Heard Kverkfjoll Okataina Shishaldin Witori
Chiginagak Hekla Lamington Okmok Simbo Wolf
Chikurachki Hierro Lamongan Ontakesan Sinabung Yasur
Chiles-Cerro Negro Hokkaido-Komagatake Langila Oraefajokull Sinarka Zaozan [Zaosan]
Chillan, Nevados de Home Reef Lanin Osorno Siple Zavodovski
Chirinkotan Hood Lascar Pacaya Sirung Zhupanovsky
Chirpoi Huaynaputina Lateiki Pagan Slamet Zubair Group
Cleveland Hudson, Cerro Lengai, Ol Doinyo Paluweh Soputan
Colima Huila, Nevado del Leroboleng Panarea Sorikmarapi
 News Feeds and Google Placemarks


Download Smithsonian / USGS Weekly Volcanic Activity Report Network RSS Feed

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. At the end of each report is a list of the sources used. 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. This feature was first made available on 5 March 2008.



Download Smithsonian / USGS Weekly Volcanic Activity Report Network CAP Feed

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.



Download Smithsonian/USGS Weekly Volcanic Activity Report Network Link Download Smithsonian / USGS Weekly Volcanic Activity Report Network Link

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 profile page and to the complete Weekly Report for that week. This feature was first made available on 1 April 2009.

 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.

For site security purposes and to ensure that this service remains available to all users, this government computer system employs software programs to monitor network traffic to identify unauthorized attempts to upload or change information, or otherwise cause damage. Unauthorized attempts to upload information or change information on this website are strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act. Information may also be used for authorized law enforcement investigations. (Last modified September 21, 1999.)

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
URL: https://volcano.si.edu/reports_weekly.cfm

 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)