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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 28 December-3 January 2006
Name Location Eruption Start Date Report Status
Fuego Guatemala 2002 Jan 4 New
Augustine United States Continuing
Colima Mexico Continuing
Galeras Colombia Continuing
Karymsky Eastern Kamchatka (Russia) 2020 Apr 1 Continuing
Kilauea Hawaiian Islands (USA) 2020 Dec 20 Continuing
Reventador Ecuador 2008 Jul 27 Continuing
Santa Ana El Salvador Continuing
Santa Maria Guatemala 1922 Jun 22 Continuing
Soufriere Hills Montserrat Continuing
St. Helens United States Continuing
Tungurahua Ecuador 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


Download Smithsonian / USGS Weekly Volcanic Activity Report Network RSS Feed

The RSS (Really Simple Syndication) feed is identical to the Weekly Volcanic Activity Report minus some features including the header information (latitude and longitude and summit elevation), the Geologic Summary, and a link to the volcano's page from the Global Volcanism Program. At the end of each report is a list of the sources used. Each volcano report includes a link from the volcano's name back to the more complete information in the Weekly Volcanic Activity Report on the Smithsonian website. This feature was first made available on 5 March 2008.



Download Smithsonian / USGS Weekly Volcanic Activity Report Network CAP Feed

The CAP (Common Alerting Protocol) feeds are XML files specifically formatted for disaster management. They are similar in content to the RSS feed, but contain no active links.



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

A Google Earth network link for the Weekly Volcanic Activity Report can be loaded into the free Google Earth software, and in turn will load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano profile page and to the complete Weekly Report for that week. This feature was first made available on 1 April 2009.

 Criteria & Disclaimers

Criteria



The Weekly Volcanic Activity Report does not necessarily include all volcanic activity that occurred on Earth during the week. More than a dozen volcanoes globally have displayed more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. The Weekly Volcanic Activity Report summarizes volcanic activity that meets one or more of the following criteria:

- A volcano observatory raises or lowers the alert level at the volcano.
- A volcanic ash advisory has been released by a volcanic ash advisory center (VAAC) stating that an ash cloud has been produced from the volcano.
- A verifiable news report of new activity or a change in activity at the volcano has been issued.
- Observers have reported a significant change in volcanic activity. Such activity can include, but is not restricted to, pyroclastic flows, lahars, lava flows, dome collapse, or increased unrest.

Volcanoes are included in the "New Activity/Unrest" section of the Weekly Volcanic Activity Report if the activity occurs after at least 3 months of quiescence. Once a volcano is included in the "New Activity/Unrest" section, updates will remain in that section unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Continuing Activity" section. Volcanoes are also included in the "New Activity/Unrest" section if the volcano is undergoing a period of relatively high unrest, or increasing unrest. This is commonly equal to Alert Level Orange on a scale of Green, Yellow, Orange, Red, where Red is the highest alert. Or alert level 3 on a scale of 1-4 or 1-5.

It is important to note that volcanic activity meeting one or more of these criteria may occur during the week, but may not be included in the Weekly Volcanic Activity Report because we did not receive a report.

Disclaimers



1. The Weekly Volcanic Activity Report is intended to provide timely information about global volcanism on a weekly basis. Consequently, the report is generated rapidly by summarizing volcanic reports from various sources, with little time for fact checking. The accuracy of the Weekly Volcanic Activity Report is dependent upon the quality of the volcanic activity reports we receive. Reports published in the Bulletin of the Global Volcanism Network are monthly, and more carefully reviewed, although all of the volcanoes discussed in the Weekly Volcanic Activity Report are not necessarily reported in the Bulletin. Because of our emphasis on rapid reporting on the web we have avoided diacritical marks. Reports are updated on the Weekly Volcanic Activity Report web page as they are received, therefore information may be included regarding events that occurred before the current report period.

2. Rapidly developing events lead to coverage that is often fragmentary. Volcanoes, their eruptions, and their plumes and associated atmospheric effects are complex phenomena that may require months to years of data analysis in order to create a comprehensive summary and interpretation of events.

3. Preliminary accounts sometimes contain exaggerations and "false alarms," and accordingly, this report may include some events ultimately found to be erroneous or misleading.

4. Many news agencies do not archive the articles they post on the Internet, and therefore the links to some sources may not be active. To obtain information about the cited articles that are no longer available on the Internet contact the source.

5. USGS Disclaimer Statement for this Website:

Information presented on this website is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credit is requested. We strongly recommend that USGS data be acquired directly from a USGS server and not through other sources that may change the data in some way. While USGS makes every effort to provide accurate and complete information, various data such as names, telephone numbers, etc. may change prior to updating. USGS welcomes suggestions on how to improve our home page and correct errors. USGS provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of furnished data.

Some of the documents on this server may contain live references (or pointers) to information created and maintained by other organizations. Please note that USGS does not control and cannot guarantee the relevance, timeliness, or accuracy of these outside materials.

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

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

 Acronyms and Abbreviations

a.s.l. - above sea level

AVO - Alaska Volcano Observatory

AVHRR - Advanced Very High Resolution Radiometer

CENAPRED - Centro Nacionale de Prevencion de Desastres (México)

CONRED - Coordinadora Nacional para la Reducción de Desastres

COSPEC - Correlation Spectrometer

CVGHM (formerly VSI) - Center of Volcanology and Geological Hazard Mitigation

CVO - Cascades Volcano Observatory (USGS)

GMS - Geostationary Meteorological Satellite

GOES - Geostationary Operational Environmental Satellite

GVO - Goma Volcano Observatory

GVP - Global Volcanism Program (Smithsonian Institution)

HVO - Hawaiian Volcano Observatory (USGS)

ICE - Instituto Costarricense de Electricidad (Costa Rica)

IG - Instituto Geofísico (Ecuador)

IGNS - Institute of Geological and Nuclear Sciences (New Zealand) - now GNS Science

INETER - Instituto Nicaragüense de Estudios Territoriales (Nicaragua)

INGEMMET - Instituto Geológical Minero y Metalúrgico (Peru)

INGEOMINAS - Instituto Colombiano de Geología y Minería (Colombia)

INGV-CT - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania (Italy)

INSIVUMEH - Instituto Nacional de Sismologia, Vulcanologia, Meteorologia e Hidrologia (Guatemala)

IRD - Institut de Recherche pour le Développement (France)

JMA - Japanese Meteorological Agency

KEMSD - Kamchatkan Experimental and Methodical Seismilogical Department

KVERT - Kamchatkan Volcanic Eruption Response Team

M - magnitude

METEOSAT - Meteorological Satellite

MEVO - Mount Erebus Volcano Observatory

MODIS - Moderate Resolution Imaging Spectroradiometer

MVO - Montserrat Volcano Observatory

MWO - Meteorological Watch Office

NEIC - National Earthquake Information Center

NIED - National Research Institute for Earth Science and Disaster Prevention (Japan)

NOAA - National Oceanic and Atmospheric Administration

NOTAM - Notice to Airmen

OVDAS - Observatorio Volcanologico de los Andes del Sur (Chile)

OFDA - Office of US Foreign Disaster Assistance

ONEMI - Oficina Nacional de Emergencia - Ministerio del Interior (Chile)

OVPDLF - Observatoire Volcanologique du Piton de la Fournaise (France)

OVSICORI-UNA - Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (Costa Rica)

PHIVOLCS - Philippine Institute of Volcanology and Seismology (Philippines)

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geologia y Mineria (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Russia)

USAID - US Agency for International Development

USGS - United States Geological Survey

UTC - Coordinated Universal Time

VAAC - Volcanic Ash Advisory Center

VAFTAD - Volcanic Ash Forecast Transport And Dispersion

VDAP - Volcano Disaster Assistance Program (USGS)

VHP - Volcano Hazards Program (USGS)

VRC - Volcano Research Center (Japan)

Report for Fuego
An eruption began at Fuego on 27 December around 0545 and produced lava flows that traveled down Taniluya (SW) and Seca (W) ravines, initially extending ~800 m and 1,200 m, respectively. At 0602 a pyroclastic flow descended Seca Ravine, producing a S-drifting column of ash that rose to a height of ~2 km above the volcano (or 18,900 ft a.s.l.). Ash fell to the S of the volcano in the port of San Jose. Later that day, the lava flows reached lengths of 1.2 and 1.3 km, and pyroclastic flows traveled 1.8 and 2 km down the Taniluya and Seca ravines, respectively. Lava flows also traveled W toward Santa Teresa ravine, and SE towards Jute and Lajas ravines. A small amount of ash fell W and SW of the volcano in the villages of Panimaché (~7 km SSW), Morelia, Santa Sofía, and Los Tarros.

Volcanic activity continued through 28 December, with incandescent lava clots hurled ~75 m high, lava flows traveling down the volcano's flanks, and a dark gas-and-ash plume rising to ~1 km above the volcano (or 15,600 ft a.s.l.). Avalanches of volcanic material spalled from lava-flow fronts. On the 29th, lava only flowed in Santa Teresa ravine, reaching ~600 m. Moderate explosions continued through 3 January, depositing small amounts of ash in Panimaché village. According to a news article, none of the ~250,000 residents from the 78 communities near the volcano were evacuated.
Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC), Reuters
Report for Augustine
Unrest continued at Augustine during 23-30 December. Seismicity rates decreased during the week, while steam-and-gas emissions continued. Brief views of the volcano during clear weather revealed that steam was continuously emitted from the volcano. The activity continued to suggest that new magma is present beneath Augustine. Based on past eruptions at Augustine, AVO expects to see a sharp increase in earthquake activity prior to a significant explosive eruption. Augustine remained at Concern Color Code Yellow.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Colima
During 28 December to 2 January, several small explosions occurred at Colima, producing ash plumes that reached ~6.1-7.6 km (20,000-25,000 ft) a.s.l. on 2 January.
Sources: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima, Washington Volcanic Ash Advisory Center (VAAC)
Report for Galeras
During 23 December to 2 January, Galeras emitted gas and small amounts of ash. On the 23rd, four events produced ash plumes that rose to ~3 km above the volcano (or 23,900 ft a.s.l.) and drifted toward the sector of Consacá, ~13 km WSW. A cluster of 33 volcano-tectonic earthquakes occurred beneath the volcano's crater during 29-30 December. The earthquakes reached a maximum magnitude of 1.2. The sulfur-dioxide flux at the volcano varied between 300 and 1,500 tons per day. Galeras remained at Alert Level 3 ("changes in the behavior of volcanic activity have been noted").
Source: Servicio Geológico Colombiano (SGC)
Report for Karymsky
KVERT reported on 30 December that a new 60- to 80-m diameter cone formed at Karymsky's summit. A small lava dome that was 20-30 m in diameter was noted in the crater of the cone. During 23-30 December, many weak, shallow earthquakes were recorded at the volcano. Interpretations of seismic data suggested that seven ash plumes rose 2.5-4 km (8,200-13,100 ft) a.s.l. during 24 and 26-27 December. Ash plumes extended mainly E, SE, and occasionally SW of the volcano. KVERT reported that ash emissions could affect low-flying aircraft in the vicinity of the volcano. Karymsky remained at Concern Color Code Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
During 28 December to 3 January, lava from Kilauea continued to enter the sea at the East Lae`apuki area and surface lava flows were visible on the Pulama pali fault scarp. Background volcanic tremor was near normal levels at Kilauea's summit. Volcanic tremor reached moderate levels at Pu`u `O`o. Small amounts of deformation occurred at the volcano.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Reventador
IG reported that during 19-25 December, seismicity was at low levels at Reventador and several small explosions occurred. According to the Washington VAAC, satellite imagery showed an ash plume at a height around 7.6 km (25,000 ft) a.s.l. extending NW on 29 December.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)
Report for Santa Ana
Observations of Santa Ana's crater on 28 December revealed that there were continuous emissions of steam and gas from the lagoon and fumaroles located within the crater. Gas rose 200-500 m above the crater (or 8,400-9,400) and drifted SW. On 30 December, seismicity at Santa Ana was above background levels. Small earthquakes occurred, which were interpreted as being associated with gas pulses. Gas emissions rose to low levels. The Alert Level remained at Red, the highest level, within a 5-km radius around the volcano's summit crater.
Source: Servicio Nacional de Estudios Territoriales (SNET)
Report for Santa Maria
On 2 January several explosions occurred at Santa María's Santiaguito lava-dome complex. Resultant ash emissions drifted SW. Lava avalanches originated from the SW edge of the Caliente dome, and from the fronts of active lava flows on the volcano's SW flank.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Soufriere Hills
Volcanic and seismic activity at Soufrière Hills remained at elevated levels during 23-30 December. Images indicated that the lava dome continued to grow over a broad sector extending from the SW around to the NE. Numerous small rockfalls continued on the S, W, and NE sides of the lava dome, adding to the talus in the upper reaches of the Tar River Valley to the NE. The sulfur-dioxide flux averaged 510 metric tons per day.
Source: Montserrat Volcano Observatory (MVO)
Report for St. Helens
Growth of the new lava dome inside the crater of Mount St. Helens continued during 28 December to 3 January, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. There were no significant changes in seismicity or deformation during the report period. Small earthquakes continued to be recorded every 2-3 minutes, with slightly larger events occurring intermittently. Tiltmeters within 500 m of the new lava dome showed small amounts of ground deformation. St Helens remained at Volcano Advisory (Alert Level 2); aviation color code Orange.
Source: US Geological Survey Cascades Volcano Observatory (CVO)
Report for Tungurahua
During 28 December to 2 January, volcanic activity at Tungurahua remained at low levels with small emissions of steam and gas, with low ash content. Plumes rose to a maximum height of 6.1 km (20,000 ft) a.s.l. on 29 December and 2 January.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)