Smithsonian / USGS Weekly Volcanic Activity Report

















 Activity for the week of 20 April-26 April 2016


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
Bagana Bougainville (Papua New Guinea) New
Cleveland Chuginadak Island (USA) New
Kerinci Indonesia New
Klyuchevskoy Central Kamchatka (Russia) New
Langila New Britian (Papua New Guinea) New
Nyiragongo DR Congo New
Pavlof United States New
San Cristobal Nicaragua New
Santa Maria Guatemala New

Aira Kyushu (Japan) Ongoing
Alaid Kuril Islands (Russia) Ongoing
Asosan Kyushu (Japan) Ongoing
Chirpoi Kuril Islands (Russia) Ongoing
Colima Mexico Ongoing
Dukono Halmahera (Indonesia) Ongoing
Karymsky Eastern Kamchatka (Russia) Ongoing
Kilauea Hawaiian Islands (USA) Ongoing
Masaya Nicaragua Ongoing
Nevado del Ruiz Colombia Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Sinabung Indonesia Ongoing
Soputan Sulawesi (Indonesia) Ongoing
Suwanosejima Ryukyu Islands (Japan) Ongoing
Tengger Caldera Eastern Java (Indonesia) Ongoing


New Activity/Unrest


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

Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 23-24 and 26 April ash plumes from Bagana rose to altitudes of 2.1-3 km (7,000-10,000 ft) a.s.l. and drifted 25-95 km S, SW, and NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Cleveland  | Chuginadak Island (USA)  | 52.825°N, 169.944°W  | Elevation 1730 m

AVO reported that during 20-26 April no unusual seismicity was detected at Cleveland, and partly to mostly cloudy satellite images captured no activity. The Level of Concern Color Code remained at Orange and the Volcano Alert Level remained at Watch.

Source: US Geological Survey Alaska Volcano Observatory (AVO)



Volcano index photo  Kerinci  | Indonesia  | 1.697°S, 101.264°E  | Elevation 3800 m

Based on reports from PVMBG, the Darwin VAAC reported that on 21 April an ash plume from Kerinci rose to an altitude of 4.3 km (14,000 ft) a.s.l., and drifted NE and E.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



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

KVERT reported that Strombolian explosions and gas-and-steam emission continued to be observed at Klyuchevskoy during 15-21 April. Satellite images showed an intense daily thermal anomaly over the volcano, and a robust gas-and-steam plume containing ash drifting 55 km NE on 15 April. At 0140 on 25 April a strong explosion generated an ash plume that rose to altitudes of 8-9 km (26,200-29,500 km) a.s.l. and, by 1428, had drifted over 450 km SW. The Aviation Color Code was raised to Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



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

Based on analyses of satellite imagery, the Darwin VAAC reported that during 21-22 April ash plumes from Langila rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted 75-110 km N.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Nyiragongo  | DR Congo  | 1.52°S, 29.25°E  | Elevation 3470 m

On 12 April the Observatoire Volcanologique de Goma reported that activity at Nyiragongo had declined since 6 April, and that the level of the lava lake had dropped. A report dated 17 April stated that some volcanic earthquakes had been located within 5 km E and 10-15 km N of the crater; continuous volcanic tremor was recorded during 0200-0400 on 17 April. In a photo dated 19 April an incandescent vent atop a spatter cone appears to be in the same location as a lava lake that had been first noted on 1 March.

Source: Goma Volcano Observatory (GVO)



Volcano index photo  Pavlof  | United States  | 55.417°N, 161.894°W  | Elevation 2493 m

On 22 April AVO stated that seismic activity at Pavlof Volcano had continued to decrease, and no anomalous activity had been detected in satellite images since weakly elevated surface temperatures were seen on 8 April. The Aviation Color Code was lowered to Green and Volcano Alert Level was lowered to Normal.

Source: US Geological Survey Alaska Volcano Observatory (AVO)



Volcano index photo  San Cristobal  | Nicaragua  | 12.702°N, 87.004°W  | Elevation 1745 m

INETER and SINAPRED reported that at 1020 on 22 April an explosion at San Cristóbal produced an ash-and-gas plume that rose 2 km above the crater and drifted SW. The seismic network recorded 10 additional explosions by 1200. Ashfall was reported in local areas including Las Brisas (10 km S), San José (8 km SSE), Santa Narcisa, Pellizco Central (12 km SSE), Los Ébanos, Los Lirios (18 km WSW), Santa Cruz (35 km SE), Las Grietas (14 km E), El Liberal, and San Lucas (13 km E). The INETER report noted that the last explosive activity occurred on 6 June 2015, though explosions that day were of lesser magnitudes.

Sources: Instituto Nicaragüense de Estudios Territoriales (INETER), Sistema Nacional para la Prevención, Mitigación y Atención de Desastres (SINAPRED)



Volcano index photo  Santa Maria  | Guatemala  | 14.756°N, 91.552°W  | Elevation 3772 m

In a special report from 15 April INSIVUMEH stated that activity at Caliente cone, part of Santa María's Santiaguito lava-dome complex, continued at a high level. A loud explosion at 0825 was followed by a pyroclastic flow that descended the SE and W flanks of Caliente cone. Collapses of the E and W edges of the crater generated a mushroom-shaped ash cloud that rose 4 km and then drifted 25 km W and SW. Ash fell in areas downwind including Monte Bello, Loma Linda, Las Marías, San Marcos (10 km SW), and Palajunoj (18 km SSW). Cloud cover obscured views during 16-18 April, though during 17-18 April an ash plume from an explosion rose 700 m and drifted SW, causing ashfall in San Marcos Palajunoj. An explosion at 0800 on 19 April generated pyroclastic flows down the SE and W flanks of Caliente cone. Collapses of the E and W edges of the crater generated a mushroom-shaped ash cloud that rose 4.5 km and then drifted 25 km W and SW. Abundant ash fell in the same areas that were affected by the 15 April explosion. Strong explosions continued during 21-22 April, along with pyroclastic flows and block avalanches on the SE flank of the cone.

In another special bulletin from 23 April, INSIVUMEH stated that a very high level of activity continued, and was the highest recorded in the previous two years. Explosions generated ash plumes that rose 4-5 km above the cone and drifted 60 km downwind, causing ashfall in the departments of Quetzaltenango, Retalhuleu, and Mazatenango. Abundant amounts of ash fell in communities closer to the volcano including San Marcos, Loma Linda, Palajunoj, Las Marías, El Palmar, and San Felipe Retalhuleu, as well as in the Monte Bello, Monte Claro, El Faro, Patzulin, and La Florida farms. Pyroclastic flows traveled 3 km E and W down the Cabello de Ángel and San Isidro drainages. The report noted that during the previous four days explosions had ejected ballistics 2-3 m in diameter as far as 3 km. On 24 April explosions produced ash plumes that rose 3.3-3.5 km. During 25-26 April a few weak explosions were observed along with avalanches from the E crater rim.

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)



Ongoing Activity


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

JMA reported that a small-scale explosion at the Minamidake summit crater (at Aira Caldera’s Sakurajima volcano) was detected on 20 April. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)



Volcano index photo  Alaid  | Kuril Islands (Russia)  | 50.861°N, 155.565°E  | Elevation 2285 m

KVERT reported that moderate activity at Alaid continued during 15-21 April. Satellite images showed an intense daily thermal anomaly over the volcano. 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  Asosan  | Kyushu (Japan)  | 32.884°N, 131.104°E  | Elevation 1592 m

JMA reported that field surveys at Asosan’s Nakadake Crater on 20 April confirmed an eruption that had been detected on 16 April. Scientists observed deposits from a phreatic explosion at a vent in the S crater which contains a crater lake. The Alert Level remained at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)



Volcano index photo  Chirpoi  | Kuril Islands (Russia)  | 46.525°N, 150.875°E  | Elevation 742 m

SVERT reported that a thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images on 20 April; gas-and-steam plumes were visible in images on 20 and 23 April. The Aviation Color Code remained at Yellow.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)



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

Based on satellite images, wind data, webcam images, and notices from the Mexico City MWO, the Washington VAAC reported that during 20-22 and 25 April ash plumes from Colima rose to altitudes of 4.9-6.7 km (16,000-24,000 ft) a.s.l. and drifted NE and NW.

Source: Washington Volcanic Ash Advisory Center (VAAC)



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

Based on analyses of satellite imagery and wind data, and notices from PVMBG, the Darwin VAAC reported that during 20-26 April ash plumes from Dukono rose to altitudes of 2.1-3 km (7,000-10,000 ft) a.s.l. and drifted as far as 250 km in multiple directions.

Source: 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 moderate activity at Karymsky continued during 15-21 April. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



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

HVO reported that seismicity beneath Kilauea's summit, upper East Rift Zone, and Southwest Rift Zone was at background levels during 20-26 April. The lava lake continued to circulate and eject spatter in the Overlook vent. Webcams recorded outgassing from multiple spatter cones on the Pu'u 'O'o Crater floor. The June 27th NE-trending lava flow continued to be active within 5.7 km NE of Pu'u 'O'o Crater.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)



Volcano index photo  Masaya  | Nicaragua  | 11.984°N, 86.161°W  | Elevation 635 m

INETER reported that during 20-23 April gas emissions at Masaya's Santiago crater were at low-to-moderate levels and RSAM values were at moderate-to-high levels. On 22 April the level of the lava lake decreased, though strong lake circulation was reported on 23 April.

Source: Instituto Nicaragüense de Estudios Territoriales (INETER)



Volcano index photo  Nevado del Ruiz  | Colombia  | 4.892°N, 75.324°W  | Elevation 5279 m

Based on an SGC notice, the Washington VAAC reported that ash plumes from Nevado del Ruiz drifted over 10 km on 22 April and almost 20 km on 24 April. Possible ash emissions rose from the volcano on 25 April. Extensive weather clouds prevented satellite views on all three days.

Source: Washington Volcanic Ash Advisory Center (VAAC)



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

KVERT reported that during 15-21 April lava-dome extrusion onto Sheveluch’s N flank was accompanied by strong fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Satellite images showed an intense daily thermal anomaly over the dome. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



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

Based on satellite images and information from PVMBG, the Darwin VAAC reported that during 20-21, 23-24, and 26 April ash plumes from Sinabung rose to altitudes of 3.6-4.5 km (12,000-15,000 ft) a.s.l. and drifted 15-50 km SW, W, and NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Soputan  | Sulawesi (Indonesia)  | 1.112°N, 124.737°E  | Elevation 1785 m

PVMBG reported that during 1-20 April diffuse white plumes from Soputan rose as high as 100 m above the crater and drifted E. The number of volcanic earthquakes and signals indicating avalanches declined. The Alert Level was lowered to 2 (on a scale of 1-4) on 21 April; residents and tourists were advised not to approach the craters within a radius of 4 km.

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



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

Based on JMA notices, pilot observations, and satellite data, the Tokyo VAAC reported explosions at Suwanosejima during 20-21 April; ash plumes rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted N and NW on 20 April.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Tengger Caldera  | Eastern Java (Indonesia)  | 7.942°S, 112.95°E  | Elevation 2329 m

Based on satellite images and wind data, the Darwin VAAC reported that on 20 April ash plumes from Tengger Caldera's Bromo cone rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted S and almost 20 km NW. On 26 April another ash plume rose to the same altitude and drifted W.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Weekly Reports Archive


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


Dropdowns to choose month and year for archived Weekly Reports.





 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.

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 http://www.volcano.si.edu/reports/usgs/
Contact: USGS Web Team
USGS Privacy Statement


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)

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 Volcanológico 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

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geología y Minería (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Kurile Islands)

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)