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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 22 August-28 August 2007
Name Location Eruption Start Date Report Status
Bagana Bougainville (Papua New Guinea) 2000 Feb 28 (in or before) New
Chikurachki Paramushir Island (Russia) New
Gamalama Halmahera New
Pavlof Alaska Peninsula, Alaska New
Raung Eastern Java New
Cleveland Chuginadak Island (USA) Continuing
Etna Sicily (Italy) 2022 Nov 27 Continuing
Fuego South-Central Guatemala 2002 Jan 4 Continuing
Karymsky Eastern Kamchatka (Russia) Continuing
Kilauea Hawaiian Islands (USA) 2021 Sep 29 Continuing
Rabaul New Britain (Papua New Guinea) Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Soufriere Hills Montserrat Continuing
St. Helens Washington Continuing
Tungurahua Ecuador Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 18,587 individual reports over 1,151 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 Bagana
RVO reported that an effusive lava flow from Bagana's summit crater began travelling down the SE flank on 6 August and continued flowing through 23 August. Continuous incandescence was visible down the SE flank during 6-10 August. During 6-23 August, white vapor plumes were occasionally accompanied by ash plumes that were generated by rockfalls from lava-flow edges. Based on satellite imagery, the Darwin VAAC reported that a diffuse plume rose to an altitude of 3.7 km (12,000 ft) a.s.l. on 23 August.
Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Rabaul Volcano Observatory (RVO)
Report for Chikurachki
KVERT reported that visual observations of Chikurachki were inhibited by cloud cover during 22-24 August. The Level of Concern Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Gamalama
CVGHM raised the Alert Level of Gamalama on 24 August from 1 to 2 (on a scale of 1-4) due to an increase in activity. Prior to 10 August, diffuse white plumes rose to an altitude of 1.8 km (5,900 ft) a.s.l. then increased in altitude to 2 km (6,600 ft) a.s.l. during 10-23 August. On 23 August, white and gray plumes rose to an altitude of 2.1 km (6,900 ft) a.s.l. Concurrent with the increased Alert Level, government officials banned access within a 2-km radius of the active crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Pavlof
Seismic activity at Pavlof remained elevated during 22-28 August. A strong thermal anomaly was present at the summit on satellite imagery on 22, 24, 25, and 28 August; clouds inhibited observations on other days. Based on pilot reports and calculations using satellite imagery, a steam-and-ash plume rose to an altitude between 3-5.5 km (10,000-18,000 ft) a.s.l. On 25 August, seismic events and explosions were more energetic and a signal suggesting a large lahar was noted. Plume altitudes from previous days and seismic interpretation indicated that an ash plume rose to an altitude of 6.1 km (20,000 ft) a.s.l. on 26 and 28 August. The Volcanic Alert Level remained at Watch and the Aviation Color Code remained at Orange.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Raung
Based on observations of satellite imagery, the Darwin VAAC reported that an ash plume from Raung rose to an altitude of 4.6 km (15,000 ft) a.s.l. during 26-27 August and drifted E.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Cleveland
Clouds obscured satellite and web camera views of Cleveland volcano during 22-28 August. A clear view of the crater on 23 and 28 August revealed thermal anomalies at the summit. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Etna
On 15 August, the South East Crater at the summit of Etna produced ash emissions from a depression on the E flank. A resultant ash plume rose a few tens of meters and quickly dispersed. Ashfall formed a red deposit on the flanks of the South East Crater cone. Based on observations using the summit web camera, incandescent blocks associated with energetic emissions of ash were propelled out of the depression on 21 August. A field assessment on 22 August revealed that the ash emissions were associated with collapses within the depression. During 23-24 August, the ash emissions increased in frequency and erupted incandescent blocks were again observed.
Source: Sezione di Catania - Osservatorio Etneo (INGV)
Report for Fuego
On 24 August, INSIVUMEH reported that fumarolic plumes from Fuego rose to an altitude of 3.9 km (12,800 ft) a.s.l. and drifted W. A lahar carried tree trunks, branches, and blocks down the Lajas drainage to the SE. A lahar again affected the drainage on 27 August. Explosions on 28 August produced ash plumes that rose to an altitude of 4.1 km (13,500 ft) a.s.l.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Karymsky
Seismic activity at Karymsky was above background levels during 17-24 August, with 300-800 shallow earthquakes occurring daily. Based on seismic interpretation, ash plumes may have risen to an altitude of 5.7 km (18,700 ft) a.s.l. Observations of satellite imagery revealed that a thermal anomaly was present in the crater on 20 and 23 August. The Level of Concern Color Code remained at Orange.

Based on information from KEMSD, eruption plumes rose to estimated altitudes of 5.8 km and 4 km (19,000 ft and 13,000 ft) a.s.l. on 23 and 25 August, respectively. Ash was not identified on satellite imagery.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
HVO reported that fissure segment D from Kilauea's 21 July fissure eruption continued to feed an advancing 'a'a lava flow during 22-28 August. In the last several weeks, four 'a'a flows had started from the open lava channel fed by Fissure D. From the second flow, each had advanced along the N edge of the previous one. The first two flows advanced a total of 6.3 km from the fissure source by 24 August. On 25 August, HVO geologists confirmed that the first three flows were inactive and the fourth flow had advanced 300 m and burned vegetation at the forest edge. During 25-26 August, the channel overflowed at a point about 1 km from the vent and spread along a section of the channel about 200-300 m long. During 27-28 August, the fourth flow was about 5.1 km from the vent and continued to advance.

Incandescence was visible on the web camera from E and W vents in Pu'u 'O'o's crater on 24 and 26 August. Small earthquakes were predominantly located beneath Halema'uma'u crater and the S flank during the reporting period.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Rabaul
RVO reported that ash plumes from Rabaul caldera's Tavurvur cone rose to altitudes of 0.9-2.4 km (3,000-7,900 ft) a.s.l. during 22-29 August and drifted NW. Ashfall was reported in Rabaul Town and surrounding areas during 23-29 August. Seismic activity increased to a high level on 25 through 29 August. The ash emissions were accompanied by roaring noises. Incandescence at the summit was observed during the reporting period.
Source: Rabaul Volcano Observatory (RVO)
Report for Sheveluch
KVERT reported that seismic activity at Shiveluch was above background levels during 17-24 August. Based on seismic interpretation, avalanches and ash plumes that rose to an altitude of 8.5 km (27,900 ft) a.s.l. occurred during the reporting period. Based on visual observation, ash plumes rose to an altitude of 5.5 km (18,000 ft) a.s.l. and drifted N and NE during 17-21 August. Incandescence at the lava dome and incandescent avalanches were seen at night on 21 August. Observations of satellite imagery revealed that a thermal anomaly was present in the crater during 17-24 August. The Level of Concern Color Code remained at Orange.

Based on information reported from KEMSD, the Tokyo VAAC reported that eruption plumes rose to altitudes of 4.9-7.6 km (16,000-25,000 ft) a.s.l. during 24-27 August. Ash was not identified on satellite imagery.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Soufriere Hills
MVO reported that during 21-28 August the lava dome at Soufrière Hills changed very little, based on visual observations. Seismic activity was very low and low-level rockfall activity continued. On 23 August, heavy rainfall triggered small rockfalls and four pyroclastic flows to the E down the Tar River Valley. Ash and steam emissions from the dome produced a plume that drifted W. A lahar occurred in the Belham river valley to the NW. The Alert Level remained elevated at 4 (on a scale of 0-5).
Source: Montserrat Volcano Observatory (MVO)
Report for St. Helens
Data from deformation-monitoring instruments indicated that during 22-28 August lava-dome growth at Mount St. Helens continued. Seismicity persisted at low levels, punctuated by M 1.5-2.5, and occasionally larger, earthquakes. Clouds occasionally inhibited visual observations.
Source: US Geological Survey Cascades Volcano Observatory (CVO)
Report for Tungurahua
IG reported that ash plumes from Tungurahua rose to altitudes of 6-9 km (19,700-29,500 ft) a.s.l. during 22-28 August and drifted mainly NW, W, and SW. Noises resembling the sounds made by blocks rolling down the flanks were reported during 22-26 August and explosions rattled windows in surrounding areas, including Baños 8 km to the N, on 24 and 25 August. Ashfall was reported in nearby areas, especially to the NW, W, and SW, during 25-28 August. On 28 August, lahars affected W and NW drainages, the Pampas sector, and interrupted traffic on the route between Ambato and Baños. Incandescent blocks rolled down the flanks.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)