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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 30 August-5 September 2006
Name Location Eruption Start Date Report Status
Soufriere Hills Montserrat New
Tengger Caldera Eastern Java New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Bulusan Luzon (Philippines) Continuing
Karymsky Eastern Kamchatka (Russia) Continuing
Kilauea Hawaiian Islands (USA) 2021 Sep 29 Continuing
Manam Northeast of New Guinea 2014 Jun 29 Continuing
Mayon Luzon (Philippines) Continuing
Piton de la Fournaise Reunion Island (France) Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
St. Helens Washington Continuing
Tungurahua Ecuador Continuing
Ubinas Peru Continuing
Ulawun New Britain (Papua New Guinea) Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 18,995 individual reports over 1,169 weeks (average of 16 per week) on 329 different volcanoes.

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Agung Cotopaxi Iliamna Lewotolok Pinatubo St. Helens
Ahyi Cuicocha Iliwerung Little Sitkin Planchon-Peteroa Stromboli
Aira Cumbal Inielika Llaima Poas Sulu Range
Akan Dabbahu Ioto Lokon-Empung Popocatepetl Sumbing
Alaid Davidof Irazu Lonquimay Purace Sundoro
Alu-Dalafilla Dempo Iya Lopevi Puyehue-Cordon Caulle Suretamatai
Ambae Descabezado Grande Izu-Torishima Machin Rabaul Suwanosejima
Ambang Dieng Volcanic Complex Jackson Segment Makushin Raikoke Taal
Ambrym Dukono Kaba Maly Semyachik Ranakah Tair, Jebel at
Anatahan Ebeko Kadovar Manam Raoul Island Takawangha
Aniakchak Ebulobo Kaitoku Seamount Manda Hararo Rasshua Talang
Antillanca Volcanic Complex Edgecumbe Kama'ehuakanaloa Marapi Raung Tambora
Antuco Egon Kambalny Maroa Redoubt Tanaga
Apoyeque Ekarma Kanaga Martin Reventador Tandikat-Singgalang
Arenal Epi Kanlaon Masaya Reykjanes Tangkoko-Duasudara
Asamayama Erebus Karangetang Maule, Laguna del Rincon de la Vieja Tangkuban Parahu
Askja Erta Ale Karkar Mauna Loa Rinjani Tara, Batu
Asosan Etna Karthala Mayon Ritter Island Ta'u
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Karymsky McDonald Islands Rotorua Taupo
Augustine Eyjafjallajokull Kasatochi Melimoyu Ruang Telica
Avachinsky Fagradalsfjall Katla Merapi Ruapehu Tenerife
Awu Fernandina Katmai Midagahara Ruiz, Nevado del Tengger Caldera
Axial Seamount Fogo Kavachi Misti, El Sabancaya Three Sisters
Azul, Cerro Fonualei Kelimutu Miyakejima Sakar Tinakula
Azumayama Fournaise, Piton de la Kelud Momotombo Salak Tofua
Bagana Fourpeaked Kerinci Monowai San Cristobal Tokachidake
Balbi Fuego Ketoi Montagu Island San Miguel Tolbachik
Bamus Fujisan Kharimkotan Moyorodake [Medvezhia] San Vicente Toliman
Banda Api Fukutoku-Oka-no-Ba Kick 'em Jenny Mutnovsky Sangay Tongariro
Bardarbunga Galeras Kie Besi Myojinsho Sangeang Api Trident
Barren Island Galunggung Kikai Nabro Santa Ana Tungurahua
Batur Gamalama Kilauea Negra, Sierra Santa Maria Turrialba
Bezymianny Gamkonora Kirishimayama Negro, Cerro Sao Jorge Ubinas
Bogoslof Gareloi Kita-Ioto Nightingale Island Sarigan Ugashik-Peulik
Brava Gaua Kizimen Nishinoshima Sarychev Peak Ukinrek Maars
Bristol Island Gorely Klyuchevskoy Nisyros Saunders Ulawun
Bulusan Great Sitkin Kolokol Group Novarupta Savo Unnamed
Calbuco Grimsvotn Koryaksky NW Rota-1 Semeru Unnamed
Callaqui Guagua Pichincha Krakatau Nyamulagira Semisopochnoi Veniaminof
Cameroon Guallatiri Krummel-Garbuna-Welcker Nyiragongo Seulawah Agam Villarrica
Campi Flegrei del Mar di Sicilia Guntur Krysuvik-Trolladyngja Ofu-Olosega Sheveluch Vulcano
Cayambe Hachijojima Kuchinoerabujima Okataina Shishaldin West Mata
Chachadake [Tiatia] Hakoneyama Kurikomayama Okmok Simbo Westdahl
Chaiten Heard Kusatsu-Shiranesan Ontakesan Sinabung Whakaari/White Island
Chiginagak Hekla Kverkfjoll Oraefajokull Sinarka Witori
Chikurachki Helgrindur La Palma Osorno Siple Wolf
Chiles-Cerro Negro Hierro Lamington Pacaya Sirung Yakedake
Chillan, Nevados de Hokkaido-Komagatake Lamongan Pagan Slamet Yasur
Chirinkotan Home Reef Langila Palena Volcanic Group Snaefellsjokull Yufu-Tsurumi
Chirpoi Hood Lanin Paluweh Soputan Zaozan [Zaosan]
Ciremai Huaynaputina Lascar Panarea Sorikmarapi Zavodovski
Cleveland Hudson, Cerro Late Papandayan Sotara Zhupanovsky
Colima Huila, Nevado del Lateiki Parker Soufriere Hills Zubair Group
Colo Hunga Tonga-Hunga Ha'apai Lengai, Ol Doinyo Pavlof Soufriere St. Vincent
Concepcion Ibu Leroboleng Pelee South Sarigan Seamount
Copahue Ijen Lewotobi Peuet Sague 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 Soufriere Hills
Based on satellite imagery and reports from the MVO, the Washington VAAC reported that the Soufrière Hills lava dome collapsed at 1740 on 29 August. Ash venting was seen on satellite imagery prior to the collapse at 0615 and 1245. The plumes reached altitudes of 2.4 km (8,000 ft) a.s.l., drifted N, and then shifted to the W and SW. According to the Antigua Aircraft Tower, the dome collapse produced a plume that rose to an altitude of about 9 km (30,000 ft) a.s.l. The upper portion of the cloud drifted E and the lower portion possibly drifted N and W. Pyroclastic flows reached the sea down the Tar River Valley.

On 30 August, small pyroclastic flows were visible on the NE and S flanks of the lava dome. On 31 August, two vigorous ash-and-steam vents opened on the W and N flanks accompanied by tremor. A pilot reported an ash plume at an altitude of 4.6 km (15,000 ft) a.s.l. drifting W. The Alert Level was raised to 4 (on a scale of 0-5). The Washington VAAC reported continuous gas and ash emissions during 1-4 September; plumes reached altitudes of 3 km (10,000 ft) a.s.l. and drifted W.
Sources: Washington Volcanic Ash Advisory Center (VAAC), Montserrat Volcano Observatory (MVO)
Report for Tengger Caldera
CVGHM reported that the Alert Level for Tengger Caldera was raised one level to 2 (on a scale of 1-4) on 1 September due to heightened activity and a strong smell of sulfur.
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), The Star
Report for Aira
Based on information from JMA, the Tokyo VAAC reported that eruptions at Sakura-jima on 3 and 4 September generated plumes that rose to ~2.7 km (~9,000 ft) a.s.l. and drifted mainly NW and N, respectively.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Bulusan
PHIVOLCS reported that steam plumes from Bulusan reached up to 350 m above the summit (6,300 ft a.s.l.) on 30 August and 1 September. The plumes drifted NW and SE, respectively.
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Report for Karymsky
Activity at Karymsky continued during 26 August-1 September, with 30-70 shallow earthquakes occurring daily. Based on interpretations of seismic data, ash plumes reached altitudes of 3 km (10,000 ft) a.s.l. A thermal anomaly in the crater was detected on 26 and 28 August. Karymsky remained at Concern Color Code Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
During 23-29 August, 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. On 1 September, the area of the East Lae'apuki lava bench was an estimated 22 hectares (54 acres) and East Ka'ili'ili was an estimated 2.3 hectares (5.7 acres). Incandescence was visible from the East Pond and January vents, South Wall complex, and Drainhole vent in Pu'u 'O'o's crater during the reporting period. Summit inflation S of Halema'uma'u caldera continued. Tremor at Pu'u 'O'o remained at a very typical moderate level.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Manam
Based on satellite imagery, the Darwin VAAC reported that ash-and-steam plumes from Manam reached altitudes of 4.6 km (15,000 ft) a.s.l. and drifted W on 1 and 2 September. Steam plumes with possible ash were visible on satellite imagery below 3 km (10,000 ft) a.s.l. and drifted NE.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Mayon
Occasional explosions at Mayon continued during 30 August-5 September. According to seismic data, four explosions were registered on 31 August. Ashfall was reported in surrounding cities including Tabaco (about 13 km NW) and Guinobatan (about 13 km SW). One small explosion was registered on 3 September. Lava extrusion and collapsing lava-flow fronts on the SE slopes continued to produce blocks and small fragments during the reporting period.
Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), Inquirer.net, The Daily Tribune
Report for Piton de la Fournaise
A small "seismic crisis" at Piton de la Fournaise began at 1000 on 30 August. A summit eruption started from the SSE edge of Dolomieu Crater at 1135 and scientists witnessed the opening of a fissure on the crater floor. A large portion of the crater floor was covered with lava by the afternoon. A second fissure opened just outside of the crater and produced a lava flow on the E flank. On 31 August, seismicity remained high and a new cone had formed in Dolomieu Crater.
Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)
Report for Popocatepetl
According to the Washington VAAC, emissions of gas, steam, and possibly ash from Popocatépetl were visible from the camera operated by CENEPRED during 4-5 September. The resulting eruption cloud drifted W and did not rise high above the summit. Incandescence was periodically observed at the summit.
Source: Washington Volcanic Ash Advisory Center (VAAC)
Report for St. Helens
During 30 August-5 September, the lava dome at Mount St. Helens continued to grow. A moderate sized seismic event and associated rockfall occurred on 3 September. The hazard status remained at Volcano Advisory (Alert Level 2); aviation color code Orange.
Source: US Geological Survey Cascades Volcano Observatory (CVO)
Report for Tungurahua
During 30 August-5 September, seismicity at Tungurahua remained low. Steam and gas plumes with low to no ash content rose to 300-600 m above the summit (17,500-18,400 ft a.s.l.) and drifted NNW and W. On 1 September, lava flows on the NW flank were confirmed to have ceased. On 2 September, incandescence at the summit was observed.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Report for Ubinas
Based on pilot reports and satellite imagery, the Buenos Aires VAAC reported continuous emissions of ash plumes from Ubinas during 30 August-1 September and on 4 September. The plumes reached altitudes of ~4.9-5.5 km (~16,000-18,000 ft) a.s.l. and drifted NE, E, and SE.
Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
Report for Ulawun
Based on satellite imagery, the Darwin VAAC reported that ash-and-steam plumes from Ulawun drifted SW and S on 30 August and 2 September, respectively.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)