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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 27 August-2 September 2003
Name Location Eruption Start Date Report Status
Karymsky Eastern Kamchatka (Russia) New
Lewotobi Flores Island (Indonesia) New
Soputan Sulawesi (Indonesia) New
Colima Mexico Continuing
Dukono Halmahera (Indonesia) 1933 Aug 13 Continuing
Karthala Grand Comore Island Continuing
Kilauea Hawaiian Islands (USA) Continuing
Klyuchevskoy Central Kamchatka (Russia) 2020 Oct 2 Continuing
Piton de la Fournaise Reunion Island (France) Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Rabaul New Britain (Papua New Guinea) Continuing
Soufriere Hills Montserrat Continuing
Tungurahua Ecuador Continuing
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 16,280 individual reports over 1,045 weeks (average of 16 per week) on 308 different volcanoes.

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Use the dropdowns to choose the year and week for archived Weekly Reports.

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Agung Concepcion Ibu Lewotolo Parker Sotara
Ahyi Copahue Ijen Little Sitkin Pavlof Soufriere Hills
Aira Cotopaxi Iliamna Llaima Pelee Soufriere St. Vincent
Akan Cuicocha Iliwerung Loihi Peuet Sague South Sarigan Seamount
Alaid Cumbal Inielika Lokon-Empung Pinatubo Spurr
Alu-Dalafilla Dabbahu Ioto Lopevi Planchon-Peteroa St. Helens
Ambae Dempo Irazu Machin Poas Stromboli
Ambang Descabezado Grande Iya Makian Popocatepetl Sulu Range
Ambrym Dieng Volcanic Complex Izu-Torishima Makushin Puyehue-Cordon Caulle Sumbing
Anatahan Dukono Jackson Segment Maly Semyachik Rabaul Sundoro
Antillanca Volcanic Complex Ebeko Kaba Manam Raikoke Suretamatai
Antuco Ebulobo Kadovar Manda Hararo Ranakah Suwanosejima
Apoyeque Egon Kambalny Marapi Raoul Island Taal
Arenal Ekarma Kanaga Maroa Rasshua Tair, Jebel at
Asamayama Epi Kanlaon Martin Raung Takawangha
Askja Erebus Karangetang Masaya Redoubt Talang
Asosan Erta Ale Karkar Maule, Laguna del Reventador Tambora
Augustine Etna Karthala Mauna Loa Reykjanes Tanaga
Avachinsky Etorofu-Yakeyama [Grozny Group] Karymsky Mayon Rincon de la Vieja Tandikat-Singgalang
Awu Eyjafjallajokull Kasatochi McDonald Islands Rinjani Tangkoko-Duasudara
Axial Seamount Fernandina Katla Melimoyu Ritter Island Tangkuban Parahu
Azul, Cerro Fogo Katmai Merapi Rotorua Tara, Batu
Azumayama Fonualei Kavachi Midagahara Ruang Telica
Bagana Fournaise, Piton de la Kelimutu Misti, El Ruapehu Tenerife
Balbi Fourpeaked Kelut Miyakejima Ruiz, Nevado del Tengger Caldera
Bamus Fuego Kerinci Momotombo Sabancaya Three Sisters
Banda Api Fujisan Ketoi Monowai Sakar Tinakula
Bardarbunga Fukutoku-Oka-no-Ba Kharimkotan Montagu Island Salak Tofua
Barren Island Galeras Kick 'em Jenny Moyorodake [Medvezhia] San Cristobal Tokachidake
Batur Galunggung Kikai Mutnovsky San Miguel Tolbachik
Bezymianny Gamalama Kilauea Myojinsho San Vicente Toliman
Bogoslof Gamkonora Kirishimayama Nabro Sangay Tongariro
Brava Gaua Kizimen Negra, Sierra Sangeang Api Tungurahua
Bristol Island Gorely Klyuchevskoy Negro, Cerro Santa Ana Turrialba
Bulusan Great Sitkin Kolokol Group Nightingale Island Santa Maria Ubinas
Calbuco Grimsvotn Korovin Nishinoshima Sarigan Ulawun
Callaqui Guagua Pichincha Koryaksky Nisyros Sarychev Peak Unnamed
Cameroon Guallatiri Krakatau Novarupta Saunders Unnamed
Campi Flegrei del Mar di Sicilia Guntur Krummel-Garbuna-Welcker NW Rota-1 Semeru Veniaminof
Cayambe Hachijojima Kuchinoerabujima Nyamuragira Semisopochnoi Villarrica
Cereme Hakoneyama Kurikomayama Nyiragongo Seulawah Agam West Mata
Chachadake [Tiatia] Heard Kusatsu-Shiranesan Okataina Sheveluch Westdahl
Chaiten Hekla Kverkfjoll Okmok Shishaldin Whakaari/White Island
Chiginagak Helgrindur Lamington Ontakesan Simbo Witori
Chikurachki Hierro Lamongan Oraefajokull Sinabung Wolf
Chiles-Cerro Negro Hokkaido-Komagatake Langila Osorno Sinarka Yasur
Chillan, Nevados de Home Reef Lanin Pacaya Siple Zaozan [Zaosan]
Chirinkotan Hood Lascar Pagan Sirung Zavodovski
Chirpoi Huaynaputina Lateiki Palena Volcanic Group Slamet Zhupanovsky
Cleveland Hudson, Cerro Lengai, Ol Doinyo Paluweh Snaefellsjokull Zubair Group
Colima Huila, Nevado del Leroboleng Panarea Soputan
Colo Hunga Tonga-Hunga Ha'apai Lewotobi Papandayan Sorikmarapi
 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 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 Karymsky
Due to increased volcanic activity at Karymsky, KVERT raised the Concern Color Code to Orange from Yellow on 29 August. On 29 August at 1240 and 1612 explosions occurred that produced ash plumes to heights of 4-4.7 km a.s.l. The plumes drifted E. During 22-29 August, seismicity was above background levels, with about 180 shallow earthquakes per day. These earthquakes indicated possible ash-and-gas explosions to heights of 1-1.5 km above the volcano.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Lewotobi
The Darwin VAAC reported that an eruption at Lewotobi on 1 September produced an ash plume to a height of ~2.5 km above the summit that drifted W. Volcanic material caused fires in forests within a 1 km radius of the crater and damaged crops on the volcano's flanks. VSI raised the Alert Level to 4, the highest level. According to news articles, hundreds of people from at least six villages fled their homes for the village of Konga to the E. By 2 September the Alert Level had been reduced to 3.
Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Agence France-Presse (AFP)
Report for Soputan
On 2 September ash emissions from Soputan rose to ~2 km a.s.l. and drifted S and W. The Alert Level was raised from 2 to 3 (on a scale of 1-4).
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Colima
According to the Universidad de Colima, an explosion at Colima on 28 August at 2352 produced an ash plume that rose to a height of ~3 km above the volcano's crater. The explosion was accompanied by pyroclastic flows that traveled 2 km down the S flank and volcanic blocks. Residents of the city of Colima, ~32 km from the volcano, heard the explosion and ash fell in the town of Grullo, ~60 km NW of the volcano. Seismic data revealed that this explosion was similar in size to one on 2 August.
Sources: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima, Washington Volcanic Ash Advisory Center (VAAC), Associated Press
Report for Dukono
On 28 August an ash plume from Dukono was visible on satellite imagery at a height of ~4.3 km a.s.l. extending ~90 km N of the summit.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Karthala
Reports of a stream of lava flowing from Karthala towards towns on 30 August were false. Authorities stated that only fume was emitted from cracks on the volcano.
Source: Agence France-Presse (AFP)
Report for Kilauea
A M 5.0 earthquake occurred 10 km beneath Kilauea's central S flank on 26 August at 2024. It was the largest earthquake since 2 April 2000, an event that occurred in almost exactly the same spot. No significant damage was done, no cracks or rockfalls were seen, and there was no change in the eruption. During 27 August to 1 September, surface lava flows were sometimes visible on the coastal flat and upslope on Pulama pali. Generally, seismicity at Kilauea's summit continued at moderate levels, with 1-2 small low-frequency earthquakes per minute occurring at shallow depths beneath the summit caldera. There were some larger events at depths of a few kilometers. Small inflation and deflation occurred during the report week.
Sources: US Geological Survey Hawaiian Volcano Observatory (HVO), Associated Press
Report for Klyuchevskoy
During 22-29 August, seismicity was above background levels at Kliuchevskoi, with 3-8 earthquakes per day of magnitude less than 2.2 occurring at depths around 30 km. On 26 August at 2300 Strombolian activity was seen in the volcano's center crater. Volcanic bombs were hurled to ~200 m above the crater. There were 5-minute intervals between explosions. During 27-28 August, gas-and-steam plumes with minor amounts of ash rose 1.5-2 km above the volcano's crater and drifted SW. Kliuchevskoi remained at Concern Color Code Orange.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Associated Press
Report for Piton de la Fournaise
An eruption that began at Piton de la Fournaise on 22 August, stopped suddenly on 27 August at 2152. During the last 36 hours of activity, there was an increase in tremor intensity and lava emission. Afterwards, numerous long-period earthquakes were recorded.
Sources: Observatoire Volcanologique du Piton de la Fournaise (OVPF), News.com.au - News Limited
Report for Popocatepetl
Aerial photography taken on 25 August revealed no external lava dome in Popocatépetl crater. On 28 August the number of low-level emissions increased in comparison to previous days. On 29 August at 1330 a low-density ash emission rose to ~1.5 km above the crater and drifted W. There were no reports of ash fall in villages near the volcano. This event was accompanied by episodes of high-frequency and low-amplitude tremor. By 1 September the number of emissions returned to levels recorded prior to the increase.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Report for Rabaul
On 10 August eruptions began again at Rabaul caldera's Tavurvur cone after 2 days of very little activity. Eruptions mainly consisted of slowly emitted convoluted ash plumes at irregular intervals. On 25 August discrete explosions began to occur. Most of the ash from the eruptions was blown NW, resulting in ashfall in towns downwind, including in Rabaul and the Nonga area. During 1 July to 28 August, seismicity was at low levels and the amount of deformation was insignificant.
Source: Rabaul Volcano Observatory (RVO)
Report for Soufriere Hills
Activity at Soufrière Hills remained at low levels during 22-29 August. No changes or growth occurred at the lava dome. Small changes occurred in the 12 July collapse scar, with new fumaroles opening to the SE of the main explosion crater towards the upper Tar River Valley. Blue haze visible N of the volcano on 25 August and a strong sulfur smell were caused by the passage of a weather system and did not reflect an activity increase.
Source: Montserrat Volcano Observatory (MVO)
Report for Tungurahua
During 27 August to 1 September, volcanic block and ash emissions continued at Tungurahua. Ash plumes rose to a maximum height of ~4 km above the volcano. The plumes primarily drifted W and SW, depositing ash in several towns including Cotaló, Pillate, Cevallos, Guaranda, Guanujo, Riobamba, and Quero. An emission on 27 August at 1350 deposited ash in Ambato ~40 km NW of the volcano and caused flight restrictions to and from the airport there.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC), Agence France-Presse (AFP), El Comercio