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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 26 May-1 June 2004
Name Location Eruption Start Date Report Status
Anatahan Mariana Islands (USA) Continuing
Bagana Bougainville (Papua New Guinea) 2000 Feb 28 (in or before) Continuing
Colima Mexico Continuing
Dukono Halmahera (Indonesia) 1933 Aug 13 Continuing
Fuego Guatemala 2002 Jan 4 Continuing
Kikai Japan Continuing
Kilauea Hawaiian Islands (USA) 2021 Sep 29 Continuing
Nyamulagira DR Congo 2018 Apr 18 Continuing
Nyiragongo DR Congo 2002 May 17 (?) Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Santa Maria Guatemala 1922 Jun 22 Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Shishaldin Fox Islands (USA) Continuing
Soufriere Hills Montserrat Continuing
Tungurahua Ecuador Continuing
Veniaminof United States Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 17,388 individual reports over 1,098 weeks (average of 16 per week) on 315 different volcanoes.

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



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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 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 Anatahan
During 26 May to 1 June, elevated seismicity at Anatahan consisted of discrete explosion signals. Every few minutes explosions threw volcanic material hundreds of meters out of the crater, and steam and ash likely rose a few hundred meters.
Source: Emergency Management Office of the Commonwealth of the Mariana Islands and United States Geological Survey Volcano Hazards Program
Report for Bagana
An ash plume from Bagana was visible on satellite imagery during 26-27 May. The plume reached a height of ~3 km a.s.l. and extended ~130 km NW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Colima
During late May low-level activity continued at Colima, with an average of two ash-containing explosions per day. The eruption clouds did not exceed 2 km above the volcano's crater and predominately drifted W.
Source: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima
Report for Dukono
During 26-31 May, Dukono occasionally emitted plumes that were visible on satellite imagery at a height of ~3 km a.s.l.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Fuego
During 31 May to 1 June moderate volcanic and seismic activity continued at Fuego, with several explosions producing ash plumes. The highest rising plume reached ~1.5 km above the volcano on 31 May. This explosion also produced avalanches of volcanic material down the ravines of Taniluyá and Santa Teresa.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Kikai
Based on information from JMA, the Tokyo VAAC reported that Kikai erupted on 1 June at 1330. The resultant ash cloud rose to an unknown height and drifted W.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Kilauea
Kilauea's Banana lava flow reached the sea on 30 May near the eastern end of the Wilipe`a lava delta. This was the first time lava had reached the sea since July 2003. The interaction of the water and lava was not explosive. During 26-31 May, low-frequency earthquakes and no noticeable tremor occurred at Kilauea's summit. Tremor at Pu`u `O`o was at its typical moderate level.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Nyamulagira
The Toulouse VAAC reported that during 26 May to 1 June there were weak but steady emissions from Nyamuragira and neighboring Nyiragongo (~13 km SE from Nyamuragira). The Goma volcano observatory confirmed that ash fell within a radius of 60 km of both volcanoes.
Source: Toulouse Volcanic Ash Advisory Centre (VAAC)
Report for Nyiragongo
The Toulouse VAAC reported that during 26 May to 1 June there were weak but steady emissions from Nyiragongo and neighboring Nyamuragira (~13 km NW from Nyiragongo). The Goma volcano observatory confirmed that ash fell within a radius of 60 km of both volcanoes.
Source: Toulouse Volcanic Ash Advisory Centre (VAAC)
Report for Popocatepetl
On 26 May at 0643 a small emission from Popocatépetl of steam, gas, and small amounts of ash produced a plume that reached a height of ~1.5 km above the volcano's crater. Ash fell in Tetela del Volcán, Morelos. Also, an M 2.4 volcano-tectonic microearthquake occurred 2 km E of the crater. Aerial photography taken on 14 April showed continued subsidence of the inner crater. No external lava dome at the bottom of the crater was distinguished. The Alert Level at Popocatépetl remained at Yellow Phase 1, therefore access was restricted in a 12-km-radius around the volcano.
Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), Agence France-Presse (AFP)
Report for Santa Maria
During 31 May to 1 June, weak-to-moderate explosions at Santa María's Santiaguito lava-dome complex produced gas-and-ash plumes that rose ~1.5 km above the crater. Small partial collapses at the edge of the Caliente lava dome produced avalanches of incandescent volcanic material down the SW flank.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Sheveluch
On 21 May, observations of Shiveluch from a helicopter revealed pyroclastic flows and partial destruction of the lava dome. Ash deposits were concentrated in the central sector of the southern volcanic slope. During 21-28 May seismicity was above background levels, with a large number of shallow earthquakes occurring. Gas-and-steam plumes rose to ~4 km a.s.l. Shiveluch remained at Concern Color Code Orange.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Shishaldin
Seismic unrest continued at Shishaldin during 21-28 May. It was characterized by weak seismic tremor and occasional discrete low-frequency earthquakes. Meteorological clouds obscured views of the volcano. Shishaldin remained at Concern Color Code Yellow.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Soufriere Hills
Volcanic and seismic activity at Soufrière Hills remained at low levels during 21-28 May. Seismicity was dominated by signals from mudflows associated with the heavy rain of 21 May. The mudflows occurred during about 1420-1636 and were followed by a swarm of 44 small earthquakes. The sulfur-dioxide flux varied, reaching values between about 225 and 920 tons per day.
Source: Montserrat Volcano Observatory (MVO)
Report for Tungurahua
During 26-31 May, small-to-moderate emissions of steam, gas, and ash occurred at Tungurahua and seismicity was at moderate levels.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)
Report for Veniaminof
During 21-28 May, the level of volcanic activity at Veniaminof was generally lower than during the previous week. Sequences of tremor accompanying ash bursts continued. On video, weak steaming and low ash bursts were seen emanating from the intracaldera cone. Most of the ash bursts did not rise above the active cone (2,156 m). Satellite imagery on 26 May showed ash deposits on the N and SE portions of the caldera. Veniaminof remained at Concern Color Code Yellow.
Source: US Geological Survey Alaska Volcano Observatory (AVO)