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Smithsonian / USGS Weekly Volcanic Activity Report

Weekly Volcanic Activity Map

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 and averaging 16 reported volcanoes, this is not a comprehensive list of all eruptions this week, but rather a summary of activity that meet criteria discussed in the "Criteria and Disclaimers" section below.

Volcanic activity reported here is preliminary and subject to change. Carefully reviewed, detailed narratives over longer time periods are published as reports of the Bulletin of the Global Volcanism Network available through volcano profile pages.

Smithsonian / USGS Weekly Volcanic Activity Report for the week of 11 November-17 November 2009
Name Country Eruption Start Date Report Status
Galeras Colombia New
Mayon Philippines 2023 Apr 27 ± 2 days New
Aira Japan 2017 Mar 25 Continuing
Arenal Costa Rica Continuing
Bagana Papua New Guinea 2000 Feb 28 (in or before) Continuing
Chaiten Chile Continuing
Fuego Guatemala 2002 Jan 4 Continuing
Karymsky Russia Continuing
Kilauea United States Continuing
Kizimen Russia Continuing
Klyuchevskoy Russia Continuing
Nevado del Huila Colombia Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Rabaul Papua New Guinea Continuing
Reventador Ecuador 2008 Jul 27 Continuing
Sangay Ecuador 2019 Mar 26 Continuing
Santa Maria Guatemala 1922 Jun 22 Continuing
Sheveluch Russia 1999 Aug 15 Continuing
Soufriere Hills United Kingdom Continuing
Suwanosejima Japan 2004 Oct 23 Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,183 individual reports over 1,223 weeks (average of 17 per week) on 334 different volcanoes.

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


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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.



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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 cover longer time periods and are 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)

Report for Galeras
INGEOMINAS reported that an overflight of Galeras on 14 November revealed thermal anomalies in the main crater measuring 110 degrees Celsius and very low rates of gas discharge. The Alert Level remained at II (Orange; "probable eruption in term of days or weeks").
Source: Servicio Geológico Colombiano (SGC)
Report for Mayon
According to news articles, an explosion from Mayon on 11 November prompted authorities to evacuate about 700 families from nearby areas. Incandescence from the crater at night on 14 November was visible from 15 km away.
Source: The Philippine Star
Report for Aira
Based on information from JMA, the Tokyo VAAC reported that explosions from Sakura-jima during 11-13 and 15-17 November produced plumes that rose to altitudes of 1.5-2.4 km (5,000-8,000 ft) a.s.l. and drifted in multiple directions.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Arenal
OVSICORI-UNA reported that during October activity originating from Arenal's Crater C consisted of gas emissions, sporadic Strombolian eruptions, and occasional avalanches that traveled down the W and SW flanks. Acid rain and small amounts of ejected pyroclastic material affected the NE and SE flanks. Avalanches from lava-flow fronts traveled down the SW flanks. Crater D produced only fumarolic activity.
Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
Report for Bagana
Based on analyses of satellite imagery, the Darwin VAAC reported that on 12 November an ash plume from Bagana rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 65 km SW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Chaiten
SERNAGEOMIN reported that during 31 October-1 November Chaitén's lava-dome complex produced steam plumes that sometimes contained gas and ash. The plumes were visible on the web camera and rose at most 1 km above the lava domes. The Alert Level remained at Red.
Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Report for Fuego
Based on analyses of satellite imagery, the Washington VAAC reported that on 12 November a gas plume from Fuego, possibly containing ash, drifted SSW. On 13 November, INSIVUMEH reported that explosions produced ash plumes that rose to altitudes of 4.2-4.7 km (13,800-15,400 ft) a.s.l. and drifted 7 km S. Rumbling noises were noted and incandescence was detected. White fumarolic plumes rose 100 m and drifted S and SW. Small plumes of ash on 16 November were seen on satellite imagery.
Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC)
Report for Karymsky
KVERT reported that seismic activity at Karymsky was above background levels during 5-9 November, a possible indication that ash plumes rose to an altitude of 3.7 km (12,100 ft) a.s.l. Analyses of satellite imagery during 5-12 November revealed almost daily thermal anomalies and ash plumes that drifted 190 km E during 8-12 November. The Level of Aviation Color Code remained at Orange. Based on information from the Yelizovo Airport (UHPP), the Tokyo VAAC reported that on 14 November an ash plume rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted E.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
During 11-17 November, HVO reported that lava flowed SE from underneath Kilauea's Thanksgiving Eve Breakout (TEB) and rootless shield complex through a lava tube system, reaching the ocean at multiple locations between Waikupanaha and an area 700 m farther to the W. Thermal anomalies detected by satellite suggested active surface lava flows. Incandescence was seen on the Pu'u 'O'o crater floor and intermittently from an East wall vent. The vent in Halema'uma'u crater continued to produce a diffuse white plume that drifted W and SW. Incandescence originated from a spattering lava pond inside the vent cavity. Measurements indicated that the sulfur dioxide emission rate at the summit remained elevated; 600 tonnes per day was measured on 16 November. The 2003-2007 average rate was 140 tonnes per day.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Kizimen
KVERT reported that seismicity from Kizimen was slightly above background levels on 6, 8, and 10 November and at background levels the other days during 7-13 November. The Level of Aviation Color Code was lowered to Green.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Klyuchevskoy
KVERT reported that during 6-13 November seismic activity from Kliuchevskoi was above background levels. Strombolian activity ejected tephra 300 m above the crater on 5, 7, and 10 November. Satellite imagery revealed a large daily thermal anomaly at the volcano. The Level of Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Nevado del Huila
INGEOMINAS reported that during 11-17 November gas plumes from Nevado del Huila were seen on the web camera rising 2.5 km and drifting downwind. Ash plumes sometimes accompanied the gas emissions on 12, 13, and 15 November. The Alert Level remained at II (Orange; "probable eruption in term of days or weeks"). Based on analyses of satellite imagery, the Washington VAAC reported that during 11-16 November thermal anomalies were seen intermittently through cloud cover.
Sources: Servicio Geológico Colombiano (SGC), Washington Volcanic Ash Advisory Center (VAAC)
Report for Popocatepetl
CENAPRED reported that on 14 November an ash plume from Popocatépetl rose to an altitude of 7.4 km (24,300 ft) a.s.l. During 14-17 November, steam-and-gas plumes sometimes contained ash.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Report for Rabaul
Based on analyses of satellite imagery, the Darwin VAAC reported that during 11-14 November ash plumes from Rabaul caldera's Tavurvur cone rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 75-150 km NW and W.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Reventador
Based on analyses of satellite imagery, the Washington VAAC reported that on 14 November ash plumes from Reventador drifted 10-20 km WNW and W. An intermittent thermal anomaly was also detected.
Source: Washington Volcanic Ash Advisory Center (VAAC)
Report for Sangay
Based on analyses of satellite imagery, the Washington VAAC reported that on 16 November small plumes from Sangay, possibly with ash, drifted WNW. A thermal anomaly was also detected.
Source: Washington Volcanic Ash Advisory Center (VAAC)
Report for Santa Maria
On 13 November, INSIVUMEH reported that an explosion from Santa María's Santiaguito lava dome complex produced a plume that drifted SW. Avalanches descended the SW flank of the dome. Based on analyses of satellite imagery, the Washington VAAC reported that on 16 November multiple ash plumes drifted WSW.
Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC)
Report for Sheveluch
KVERT reported that during 6-13 November seismic activity from Shiveluch was above background levels, possibly indicating that ash plumes rose to an altitude of 5.5 km (18,000 ft) a.s.l. According to video camera data, ash plumes rose to an altitude of 4.2 km (13,800 ft) a.s.l. on 5 November and hot avalanches were noted during 10-12 November. Analyses of satellite imagery revealed a large daily thermal anomaly on the lava dome and ash plumes that drifted 320 km E on 11 November. The Level of Aviation Color Code remained at Orange. Based on information from KEMSD and analyses of satellite imagery, the Tokyo VAAC reported that on 14 November an eruption produced a plume that rose to an altitude of 4.9 km (16,000 ft) a.s.l.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Soufriere Hills
MVO reported that during 6-13 November activity from the Soufrière Hills lava dome continued at a high level. Pyroclastic flows mainly occurred towards the W down Gages Valley and SW down Gingoes Ghaut. Good views of the lava dome on 9 and 10 November revealed that recent lava-dome growth was concentrated on the WSW side, immediately NE of Chances Peak; intense incandescence and rockfalls were noted at night. Ash fell across the Montserrat on 11 November, and about 6-8 km NW in Salem, Old Towne, Olveston, and Woodlands on 12 November. The largest pyroclastic flow during the reporting period, on 12 November, traveled WSW, nearly reaching the sea at Kinsale village. The Hazard Level remained at 3.
Source: Montserrat Volcano Observatory (MVO)
Report for Suwanosejima
Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 12 and 16 November. Details of possible resulting emissions were not reported.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)