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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 13 December-19 December 2006
Name Country Volcanic Region Eruption Start Date Report Status
Klyuchevskoy Russia Eastern Kamchatka Volcanic Arc 2025 Apr 8 New
Sheveluch Russia Eastern Kamchatka Volcanic Arc 1999 Aug 15 New
Soputan Indonesia Sangihe Volcanic Arc New
Aira Japan Ryukyu Volcanic Arc 2017 Mar 25 Continuing
Bulusan Philippines Eastern Philippine Volcanic Arc 2025 Apr 28 Continuing
Colima Mexico Trans-Mexican Volcanic Arc Continuing
Etna Italy Sicily Volcanic Province 2022 Nov 27 Continuing
Home Reef Tonga Tofua Volcanic Arc 2024 Dec 4 Continuing
Karymsky Russia Eastern Kamchatka Volcanic Arc 2025 Apr 30 Continuing
Kilauea United States Hawaiian-Emperor Hotspot Volcano Group 2024 Dec 23 Continuing
Manam Papua New Guinea Bismarck Volcanic Arc 2018 May 10 ± 10 days Continuing
Piton de la Fournaise France Reunion Hotspot Volcano Group Continuing
Popocatepetl Mexico Trans-Mexican Volcanic Arc 2005 Jan 9 Continuing
Rabaul Papua New Guinea Bismarck Volcanic Arc Continuing
Soufriere Hills United Kingdom Lesser Antilles Volcanic Arc Continuing
St. Helens United States High Cascades Volcanic Arc Continuing
Tungurahua Ecuador Northern Andean Volcanic Arc Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 21,469 individual reports over 1,278 weeks (average of 17 per week) on 339 different volcanoes.

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Adams Cotopaxi Ijen Lewotobi Peuet Sague St. Helens
Agung Cuicocha Iliamna Lewotolok Pinatubo Stromboli
Ahyi Cumbal Iliwerung Little Sitkin Planchon-Peteroa Sulu Range
Aira Dabbahu Inielika Llaima Poas Sumbing
Akan Davidof Ioto Lokon-Empung Popocatepetl Sumisujima
Alaid Dempo Irazu Lonquimay Purace Sundoro
Alu-Dalafilla Descabezado Grande Iwatesan Lopevi Puyehue-Cordon Caulle Suoh
Ambae Dieng Volcanic Complex Iya Machin Rabaul Suretamatai
Ambang Dukono Izu-Torishima Makushin Raikoke Suwanosejima
Ambrym East Epi Jackson Segment Maly Semyachik Ranakah Taal
Anatahan Ebeko Kaba Manam Raoul Island Tair, Jebel at
Aniakchak Ebulobo Kadovar Manda Hararo Rasshua Takawangha
Antillanca Volcanic Complex Edgecumbe Kaitoku Seamount Marapi Raung Talang
Antuco Egon Kama'ehuakanaloa Maroa Redoubt Tambora
Apoyeque Ekarma Kambalny Martin Reventador Tanaga
Arenal Eldey Kanaga Masaya Reykjanes Tandikat-Singgalang
Asamayama Erebus Kanlaon Matthew Island Rincon de la Vieja Tangkoko-Duasudara
Askja Erta Ale Karangetang Maule, Laguna del Rinjani Tangkuban Parahu
Asosan Etna Karkar Mauna Loa Ritter Island Tara, Batu
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Karthala Mayon Rotorua Ta'u
Augustine Eyjafjallajokull Karymsky McDonald Islands Ruang Taupo
Avachinsky Fagradalsfjall Kasatochi Melebingoy Ruapehu Telica
Awu Fentale Katla Melimoyu Ruby Tenerife
Axial Seamount Fernandina Katmai Merapi Ruiz, Nevado del Tengger Caldera
Azul, Cerro Fogo Kavachi Midagahara Sabancaya Three Sisters
Azumayama Fonualei Kelimutu Misti, El Sakar Tinakula
Bagana Fournaise, Piton de la Kelud Miyakejima Salak Tofua
Balbi Fourpeaked Kerinci Momotombo San Cristobal Tokachidake
Bamus Fuego Ketoi Monowai San Miguel Tolbachik
Banda Api Fujisan Kharimkotan Montagu Island San Vicente Toliman
Bardarbunga Fukutoku-Oka-no-Ba Kick 'em Jenny Moyorodake [Medvezhia] Sangay Tongariro
Barren Island Galeras Kie Besi Mutnovsky Sangeang Api Trident
Batur Galunggung Kikai Myojinsho Santa Ana Tungurahua
Bezymianny Gamalama Kilauea Nabro Santa Maria Turrialba
Bogoslof Gamkonora Kirishimayama Negra, Sierra Sao Jorge Ubinas
Brava Gareloi Kita-Ioto Negro, Cerro Sarigan Ugashik-Peulik
Bristol Island Gaua Kizimen Nightingale Island Sarychev Peak Ukinrek Maars
Bulusan Gede Klyuchevskoy Nishinoshima Saunders Ulawun
Calbuco Gorely Kolokol Group Nisyros Savo Unnamed
Callaqui Great Sitkin Kolumbo Northern EPR at 9.8°N Semeru Unnamed
Cameroon Grimsvotn Koryaksky Novarupta Semisopochnoi Veniaminof
Campi Flegrei Guagua Pichincha Krakatau NW Rota-1 Seulawah Agam Villarrica
Campi Flegrei del Mar di Sicilia Guallatiri Krummel-Garbuna-Welcker Nyamulagira Sheveluch Vulcano
Cayambe Guntur Krysuvik-Trolladyngja Nyiragongo Shishaldin West Mata
Chachadake [Tiatia] Hachijojima Kuchinoerabujima Ofu-Olosega Simbo Westdahl
Chaiten Hakoneyama Kurikomayama Okataina Sinabung Whakaari/White Island
Chiginagak Heard Kusatsu-Shiranesan Okmok Sinarka Witori
Chikurachki Hekla Kverkfjoll Ontakesan Siple Wolf
Chiles-Cerro Negro Helgrindur La Palma Oraefajokull Sirung Wrangell
Chillan, Nevados de Hierro Lamington Osorno Slamet Yakedake
Chirinkotan Hokkaido-Komagatake Lamongan Pacaya Snaefellsjokull Yasur
Chirpoi Home Reef Langila Pagan Soputan Yellowstone
Ciremai Hood Lanin Palena Volcanic Group Sorikmarapi Yufu-Tsurumi
Cleveland Huaynaputina Lascar Paluweh Sotara Zaozan [Zaosan]
Colima Hudson, Cerro Late Panarea Soufriere Hills Zavodovski
Colo Huila, Nevado del Lateiki Papandayan Soufriere St. Vincent Zhupanovsky
Concepcion Hunga Tonga-Hunga Ha'apai Lengai, Ol Doinyo Pavlof South Sarigan Seamount Zubair Group
Copahue Ibu Lereboleng Pelee Spurr
 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 Klyuchevskoy
On 19 December, KVERT reported that the Level of Concern Color Code for Kliuchevskoi was raised from Green to Yellow due to a slight increase in seismicity above background levels. Moderate fumarolic activity was noted from the crater. A thermal anomaly in the crater was detected on satellite imagery on 14, 15, and 18 December.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Sheveluch
According to observations and video data, KVERT reported that ash plumes from Shiveluch rose to 4 km (13,100 ft) a.s.l. and drifted NW and ESE on 8 and 12 December, respectively. Based on satellite imagery, ash plumes rose to altitudes of 6-7.5 km (19,700-24,600 ft) a.s.l. and drifted E and NE during 8-15 December. Seismic activity was generally at background levels. The Tokyo VAAC and KVERT reported that ash plumes rose to altitudes of 7.6-10 km (25,000-32,800 ft) a.s.l. and drifted E and NW on 16 and 17 December.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Soputan
According to CVGHM, seismic signals from rockfalls increased at Soputan during 11-13 December. On 14 December, ash clouds rose to an altitude of 2 km (6,600 ft) a.s.l. and ash fell within a 15 km radius of the peak. The emissions were accompanied by thunderous noises that were heard 8 km from the peak. On 15 December the Alert Level was raised from 2 to 3 (on a scale of 1-4) due to this increase in activity.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Aira
Based on information from JMA, the Tokyo VAAC reported an explosion from Sakura-jima on 13 December.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Bulusan
According to new articles, Bulusan emitted ash that was accompanied by rumbling noises and lightning flashes on 20 December. Clouds hindered a view of the summit. Ash deposits up to 4 mm thick were noted in several villages at the foothills.
Source: Associated Press
Report for Colima
Based on satellite imagery, the Washington VAAC reported that continuous ash-and-steam emissions from Colima produced a plume that drifted SE and W on 15 December.
Source: Washington Volcanic Ash Advisory Center (VAAC)
Report for Etna
Based on increased volcanic tremor, INGV reported that weak Strombolian activity and emissions of lava and ash from the SE Crater of Etna occurred on 6 December. Later that day, seismicity dropped and explosive activity stopped. On 11 December, INGV monitoring cameras recorded Strombolian activity that resumed from a pit on the SE Crater, following a weak increase of seismicity. Lava was emitted continuously from the E flank of the SE Crater since 13 October. Lava also flowed from a vent at 2800 m elevation on the W headwall of the Valle del Bove. The eruption and lava flows from the 2800-m vent finished on 15 December. The Toulouse VAAC reported that a diffuse plume possibly containing ash was intermittently visible from a webcam on 13 December, drifting E.
Sources: Sezione di Catania - Osservatorio Etneo (INGV), Toulouse Volcanic Ash Advisory Centre (VAAC)
Report for Home Reef
Observers from a Royal New Zealand Airforce aircraft reported venting and a sulphur smell from Home Reef on 8 December. The island was about 450 m in diameter, circular in shape, and rose to a height of 73 m (240 ft) a.s.l. The water around the island was cloudy with sediment.
Source: GeoNet
Report for Karymsky
Seismic data from Karymsky were not available during 8-15 December. Ash plumes were observed drifting in all directions during the reporting period. A thermal anomaly in the crater was detected on satellite imagery during 8-12 December. Pilots reported that an ash plume rose to an altitude of 7 km (23,000 ft) a.s.l. and drifted E on 17 December. Based on satellite data, the Tokyo VAAC reported that an ash plume rose to an altitude of 8.2 km (27,000 ft) a.s.l. and drifted E. The Level of Concern Color Code remained at Orange.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
During 13-19 December, lava from Kilauea continued to flow off of a lava delta into the ocean at the East Lae'apuki and East Ka'ili'ili entries. Incandescence on the pali was visible during the reporting period. Rare surface activity on the flow field was observed on 13 December. Incandescence was intermittently visible from the East Pond and January vents, South Wall complex, and Drainhole vent in Pu'u 'O'o's crater. Tremor near Pu`u `O`o continued at moderate levels.

According to a news article, a three-year-long inflationary trend of Kilauea's summit and E and SW rift zones ceased in early October. Since the current on-going eruption began in 1983, a total of three such events have occurred.
Sources: US Geological Survey Hawaiian Volcano Observatory (HVO), Honolulu Advertiser
Report for Manam
Based on satellite imagery, the Darwin VAAC reported that diffuse plumes from Manam drifted mainly W during 13-15 December.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Piton de la Fournaise
OVPDLF reported that the eruption of Piton de la Fournaise that began on 30 August continued during 13-19 December. Lava flows covered the entire Dolomieu crater floor to a thickness of 10-30 m and spilled over the E rim of the crater, producing flows 100-200 m in length. A lava tube formed from a 27 November overflow of the Dolomieu crater drained lava on the E flank that traveled 2.5 km, S of crater Jean.
Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)
Report for Popocatepetl
Based on information from the Mexico City MWO and satellite imagery, the Washington VAAC reported that an ash plume from Popocatépetl rose to an altitude of 6.7 km (22,000 ft) a.s.l. on 18 December.
Source: Washington Volcanic Ash Advisory Center (VAAC)
Report for Rabaul
Based on satellite imagery, the Darwin VAAC reported that diffuse plumes from Rabaul drifted mainly N and E during 15-17 December.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Soufriere Hills
During 8-15 December, moderate lava-dome growth at Soufrière Hills continued and was focused on the SW part of the dome. Most of the dome surface in a sector from the S to the NW was below 100°C based on thermal images and moisture along with sulfur deposits accumulated along the SE edge. The dome overtopped the NE crater wall and fresh rock and boulder deposits were observed in that region.
Source: Montserrat Volcano Observatory (MVO)
Report for St. Helens
Data from deformation-monitoring instruments showed that during 13-19 December the lava dome at Mount St. Helens continued to grow. Seismicity continued at low levels, punctuated by M 1.5-2.5 and occasionally larger earthquakes. Observations were hindered due to inclement weather during most of the reporting period, but on 18 December, a steam plume rose several hundred meters above the rim and was visible from the Portland area, about 80 km away.
Sources: Associated Press, US Geological Survey Cascades Volcano Observatory (CVO)
Report for Tungurahua
IG reported that during 13-19 December seismic activity from Tungurahua was minimal in intensity and duration. Steam plumes with possible light-ash content reached an altitude of 8 km (26,000 ft) a.s.l. on 13 December and between 5.8-6 km (19,000-19,700 ft) a.s.l. during 14-17 and 19 December. The plumes drifted in multiple directions. On 14 December, a lahar traveled SW down the Mapayacu gorge.
Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)