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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, 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 that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed narratives on various volcanoes are published as reports of the Bulletin of the Global Volcanism Network.

Smithsonian / USGS Weekly Volcanic Activity Report for the week of 5 February-11 February 2003
Name Location Eruption Start Date Report Status
Asamayama Honshu (Japan) New
Lokon-Empung Sulawesi (Indonesia) New
Tokachidake Hokkaido (Japan) New
Etna Sicily (Italy) 2013 Sep 3 Continuing
Karangetang Siau Island (Indonesia) 2018 Nov 25 Continuing
Kilauea Hawaiian Islands (USA) 2020 Dec 20 Continuing
Klyuchevskoy Central Kamchatka (Russia) 2019 Apr 9 Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Semeru Eastern Java (Indonesia) 2014 Apr 1 ± 15 days Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Soufriere Hills Montserrat Continuing
Stromboli Aeolian Islands (Italy) 1934 Feb 2 Continuing
Tungurahua Ecuador Continuing
Veniaminof United States Continuing
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 16,408 individual reports over 1,051 weeks (average of 16 per week) on 309 different volcanoes.

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

Report for Asamayama
According to VRC, a photographer noticed two continuous puffs of discolored "smoke" rising from the summit of Asama on 6 February around noon. JMA noted that a puff was recorded on video footage rising 300 m above the summit crater around 1202. A small amount of ash was deposited on snow near the rim of the summit crater. Tremor, related to the emission, started around 1201 and lasted about 40 seconds. Otherwise, seismicity was at background levels and had been for several months. In addition, the temperature of the crater bottom was rather low. The last reported ash eruption at Asama occurred in July 1990.
Source: Volcano Research Center-Earthquake Research Institute (University of Tokyo)
Report for Lokon-Empung
Starting at the beginning of the report week (3-9 February), there was an increase in seismicity and surface activity at Lokon-Empung in comparison to the previous week. There were more emission, and deep and shallow volcanic earthquakes and ash emissions. On 8 February at 0443 an ash explosion was accompanied by the ejection of incandescent volcanic material. A thick ash cloud rose to 1.4 km over the crater and 0.5-1 mm of ash was deposited S of the volcano in the villages of Kayau, Tara-tara I and II, and Woloan II and III. At this time the Alert Level was raised from 2 to 3 (on a scale of 1-4).
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Tokachidake
According to a news report, on 8 February volcanic tremor occurred at Tokachi that lasted for 37 minutes. A Japan Meteorological Agency monitor did not see any emissions or other signs that an eruption had occurred.
Source: Associated Press
Report for Etna
INGV-CT reported that the Etna flank eruption that began on 27 October 2002 ended on 28 January 2003 after 3 months of activity. In January, lava flows and Strombolian explosions were confined to Etna's S flank at a 2,750-m-elevation vent. Lava flows emitted from this vent formed a fan, covering the previous lava-flow field. Strombolian activity from the 2,750-m-cinder cone significantly declined on 27 January and ended on 29 January. In addition, lava flows slowed down on the 27th and by the 29th were no longer fed and were cooling down. At the same time there was a significant decrease in SO2 emission to a minimum of 2,000 tons/day on 29 January. Volcanic-tremor amplitude also showed a marked decrease on 27 January. The end of the eruption was interpreted to occur on 28 January at 2240 when volcanic tremor decreased to background levels.
Source: Sezione di Catania - Osservatorio Etneo (INGV)
Report for Karangetang
Volcanic activity at Karangetang during 3-9 February consisted of low-level ash clouds rising above South and North craters, incandescent glow extending to 50 m above South Crater, and booming noises that were heard at the observation post. On 6 February at 0027 an ash explosion produced a cloud to an unknown height that deposited ash in villages SW of the volcano, including Akesembeka, Tarurane, Tatahadeng, Bebali, and Salili. During the report week, there was a significant increase in volcanic and emission earthquakes in comparison to the previous week. Karangetang remained at Alert Level 3 (on a scale of 1-4).
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Kilauea
During 5-11 February at Kilauea, lava continued to enter the sea at the West Highcastle entry and surface lava flows traveled down the Pulama pali fault scarp. The Chain of Craters road, which provides access to a lava-viewing area, was closed due to a wildfire that was started by lava flows. Generally, the long-lasting swarm of long-period earthquakes and tremor at Kilauea's summit, which began last June, continued at low levels. On 9 and 10 February short, small, periods of deflation and inflation occurred at the Uwekahuna and Pu`u `O`o tiltmeters.
Sources: US Geological Survey Hawaiian Volcano Observatory (HVO), Associated Press
Report for Klyuchevskoy
Seismicity was slightly above background levels during 31 January to 7 February at Kliuchevskoi, with 16-39 earthquakes occurring each day, at depths of ~30 km. Continuous spasmodic volcanic tremor was registered during the report week, and gas-and-steam plumes rose to 1.3 km above the crater. The Concern Color Code remained at Yellow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Popocatepetl
During 4-10 February, several moderate-sized emissions at Popocatépetl sent ash plumes to a height of ~2 km. On 4 February at 0459 a moderate dome-destruction explosion ejected incandescent volcanic material that fell as far as ~2 km down the volcano's flanks. On 5 and 6 February similar sized emissions occurred that were accompanied by episodes of low-amplitude harmonic tremor for up to 3 hours. According to CENAPRED, due to the remains of a lava dome inside the crater, there remained a significant chance of further explosive activity, ash emissions, and incandescent ejections around the crater.
Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), Washington Volcanic Ash Advisory Center (VAAC)
Report for Semeru
During 3-9 February, volcanic activity remained at high levels at Semeru, with ash plumes rising 300-400 m above the summit. On 7 February a pyroclastic flow traveled 2-4 km into the Besuk Bang River. Seismicity during the report period was dominated by 777 explosion events and 14 pyroclastic flows were recorded. Semeru remained at Alert Level 2 (on a scale of 1-4).
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Sheveluch
During 31 January to 7 February, seismicity remained above background levels at Shiveluch and many shallow earthquakes were recorded. Intermittent volcanic spasmodic tremor occurred and gas-and-steam plumes rose to 1.5 km above the crater. Thermal anomalies were visible on satellite imagery. Shiveluch remained at Concern Color Code Yellow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Soufriere Hills
Activity at Soufrière Hills remained at moderate levels during 31 January to 7 February. Growth of the lava dome was focused on a large, steep lobe directed to the NE. Continuous growth and failure of the lobe produced pyroclastic flows and rockfalls in Tuitt's Ghaut, White's Ghaut, and along the N side of the Tar River Valley. A small amount of rockfall material was directed W towards Fort Ghaut. SO2 emission rates were slightly lower than the previous week. The Washington VAAC stated that several low-level ash plumes were visible on satellite imagery.
Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
Report for Stromboli
INGV-CT reported that the effusive eruption that began at Stromboli on 28 December 2002, continued through 6 February 2003. Emission of lava occurred from a main vent located at 500 m elevation in the middle of the Sciara de Fuocco (a horseshoe-shaped scarp), within the scar left by the 30 December 2002 landslide. Another vent, located at 600 m elevation at the NE base of Crater 1, was active several times during the eruption. Slow, short lava flows were emitted from this vent for periods lasting a few hours to a few days. During peaks in effusion rate, aa lava flows reached the sea, causing phreatic explosions at the lava-flow front.

During a thermal survey from a helicopter on 12 January, arcuate cracks were seen around the S base of the volcano's summit craters. Other fractures, oriented NE-SW, cut through the craters. Collapse of the crater's bottom during early January significantly changed the morphology of the upper part of the volcano. Previously there had been three individual craters, but scientists saw that Crater 1 (NE) and 3 (SW) had joined together to form one elongate depression. Crater 2 (the middle crater) no longer existed. INGV-CT noted that no explosive activity had occurred at the summit craters since the start of the activity within the Sciara del Fuocco. News about the eruption (in Italian), thermal images, photos, and videos of the 30 December 2002 collapse event can be downloaded from the INGV-CT website.
Source: Sezione di Catania - Osservatorio Etneo (INGV)
Report for Tungurahua
Seismic and volcanic activity remained at relatively low levels at Tungurahua during 5-11 February, with emissions of steam, gas, and ash producing low-level plumes. Incandescence was visible in the crater during some evenings.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)
Report for Veniaminof
The elevated seismicity that began at Veniaminof in mid-December 2002 continued through 31 January to 7 February. Discrete seismic events occurred at rates up to 1 event per minute. AVO stated that at this level of seismic unrest, low-level steaming and minor ash emissions may occur at any time. No elevated surface temperatures, ash emissions, or ash deposits were noted on satellite images. The Concern Color Code remained at Yellow.
Source: US Geological Survey Alaska Volcano Observatory (AVO)