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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 31 October-6 November 2007
Name Country Eruption Start Date Report Status
Kelud Indonesia New
Krakatau Indonesia New
Ol Doinyo Lengai Tanzania 2017 Apr 9 New
Bezymianny Russia 2016 Dec 5 Continuing
Chikurachki Russia Continuing
Colima Mexico Continuing
Galeras Colombia Continuing
Jebel at Tair Yemen Continuing
Karymsky Russia Continuing
Kilauea United States Continuing
Rabaul Papua New Guinea Continuing
Semeru Indonesia 2017 Jun 6 Continuing
Sheveluch Russia 1999 Aug 15 Continuing
Soufriere Hills United Kingdom Continuing
St. Helens United States Continuing
Tungurahua Ecuador Continuing
Ubinas Peru Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,115 individual reports over 1,220 weeks (average of 16 per week) on 333 different volcanoes.

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Agung Cotopaxi Iliamna Little Sitkin Poas Sulu Range
Ahyi Cuicocha Iliwerung Llaima Popocatepetl Sumbing
Aira Cumbal Inielika Lokon-Empung Purace Sundoro
Akan Dabbahu Ioto Lonquimay Puyehue-Cordon Caulle Suretamatai
Alaid Davidof Irazu Lopevi Rabaul Suwanosejima
Alu-Dalafilla Dempo Iya Machin Raikoke Taal
Ambae Descabezado Grande Izu-Torishima Makushin Ranakah Tair, Jebel at
Ambang Dieng Volcanic Complex Jackson Segment Maly Semyachik Raoul Island Takawangha
Ambrym Dukono Kaba Manam Rasshua Talang
Anatahan East Epi Kadovar Manda Hararo Raung Tambora
Aniakchak Ebeko Kaitoku Seamount Marapi Redoubt Tanaga
Antillanca Volcanic Complex Ebulobo Kama'ehuakanaloa Maroa Reventador Tandikat-Singgalang
Antuco Edgecumbe Kambalny Martin Reykjanes Tangkoko-Duasudara
Apoyeque Egon Kanaga Masaya Rincon de la Vieja Tangkuban Parahu
Arenal Ekarma Kanlaon Maule, Laguna del Rinjani Tara, Batu
Asamayama Eldey Karangetang Mauna Loa Ritter Island Ta'u
Askja Erebus Karkar Mayon Rotorua Taupo
Asosan Erta Ale Karthala McDonald Islands Ruang Telica
Atka Volcanic Complex Etna Karymsky Melebingoy Ruapehu Tenerife
Augustine Etorofu-Yakeyama [Grozny Group] Kasatochi Melimoyu Ruby Tengger Caldera
Avachinsky Eyjafjallajokull Katla Merapi Ruiz, Nevado del Three Sisters
Awu Fagradalsfjall Katmai Midagahara Sabancaya Tinakula
Axial Seamount Fernandina Kavachi Misti, El Sakar Tofua
Azul, Cerro Fogo Kelimutu Miyakejima Salak Tokachidake
Azumayama Fonualei Kelud Momotombo San Cristobal Tolbachik
Bagana Fournaise, Piton de la Kerinci Monowai San Miguel Toliman
Balbi Fourpeaked Ketoi Montagu Island San Vicente Tongariro
Bamus Fuego Kharimkotan Moyorodake [Medvezhia] Sangay Trident
Banda Api Fujisan Kick 'em Jenny Mutnovsky Sangeang Api Tungurahua
Bardarbunga Fukutoku-Oka-no-Ba Kie Besi Myojinsho Santa Ana Turrialba
Barren Island Galeras Kikai Nabro Santa Maria Ubinas
Batur Galunggung Kilauea Negra, Sierra Sao Jorge Ugashik-Peulik
Bezymianny Gamalama Kirishimayama Negro, Cerro Sarigan Ukinrek Maars
Bogoslof Gamkonora Kita-Ioto Nightingale Island Sarychev Peak Ulawun
Brava Gareloi Kizimen Nishinoshima Saunders Unnamed
Bristol Island Gaua Klyuchevskoy Nisyros Savo Unnamed
Bulusan Gorely Kolokol Group Novarupta Semeru Veniaminof
Calbuco Great Sitkin Koryaksky NW Rota-1 Semisopochnoi Villarrica
Callaqui Grimsvotn Krakatau Nyamulagira Seulawah Agam Vulcano
Cameroon Guagua Pichincha Krummel-Garbuna-Welcker Nyiragongo Sheveluch West Mata
Campi Flegrei Guallatiri Krysuvik-Trolladyngja Ofu-Olosega Shishaldin Westdahl
Campi Flegrei del Mar di Sicilia Guntur Kuchinoerabujima Okataina Simbo Whakaari/White Island
Cayambe Hachijojima Kurikomayama Okmok Sinabung Witori
Chachadake [Tiatia] Hakoneyama Kusatsu-Shiranesan Ontakesan Sinarka Wolf
Chaiten Heard Kverkfjoll Oraefajokull Siple Wrangell
Chiginagak Hekla La Palma Osorno Sirung Yakedake
Chikurachki Helgrindur Lamington Pacaya Slamet Yasur
Chiles-Cerro Negro Hierro Lamongan Pagan Snaefellsjokull Yufu-Tsurumi
Chillan, Nevados de Hokkaido-Komagatake Langila Palena Volcanic Group Soputan Zaozan [Zaosan]
Chirinkotan Home Reef Lanin Paluweh Sorikmarapi Zavodovski
Chirpoi Hood Lascar Panarea Sotara Zhupanovsky
Ciremai Huaynaputina Late Papandayan Soufriere Hills Zubair Group
Cleveland Hudson, Cerro Lateiki Pavlof Soufriere St. Vincent
Colima Huila, Nevado del Lengai, Ol Doinyo Pelee South Sarigan Seamount
Colo Hunga Tonga-Hunga Ha'apai Leroboleng Peuet Sague Spurr
Concepcion Ibu Lewotobi Pinatubo St. Helens
Copahue Ijen Lewotolok Planchon-Peteroa Stromboli
 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 Kelud
CVGHM reported that a series of earthquakes from Kelut during 24-31 October were dominated by shallow events and tremor. Seismicity intensified during 2-3 November, and then decreased on 4 November. On 2 November the temperature of the crater lake was 50 degrees Celsius, the highest temperature recorded. On 4 November, white plumes rose to an altitude of 2 km (6,600 ft) a.s.l. and drifted N. Observations of video footage from a closed-circuit television camera revealed that a black mass protruded from the lake and was likely the cause of the plumes. The Alert Level remained at 4 (on a scale of 1-4).
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Krakatau
According to a news article, "red-hot lava flares" from Anak Krakatau rose 500-700 m above the S crater on 6 November. Multiple ash clouds were also observed.
Source: Bernama
Report for Ol Doinyo Lengai
According to Frederick Belton's Ol Doinyo Lengai website, the owner of a camp on the S shore of Lake Natron reported that ash eruptions continued "daily" and some "lava eruptions" were observed at night. Based on pilot observations, the Toulouse VAAC reported an eruption on 6 November.
Sources: Toulouse Volcanic Ash Advisory Centre (VAAC), Ol Doinyo Lengai (Fred Belton)
Report for Bezymianny
Based on seismic interpretation, KVERT reported that a series of explosions or collapses from lava flow fronts at Bezymianny occurred on 5 November. Two avalanches and an ash plume were also detected. Observations of satellite imagery revealed a thermal anomaly over the lava dome. The level of Concern Color Code remained at Yellow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Chikurachki
KVERT reported that clouds obscured satellite views of Chikurachki during 26 October-2 November. The Level of Concern Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Colima
During 31 October-1 November, vapor-and-ash plumes from Colima rose to an altitude of 4.5 km (14,800 ft) a.s.l. Based on reports from the Mexico City MWO, the Washington VAAC reported that an ash plume from Colima drifted N on 1 November.
Sources: Gobierno del Estado de Colima, Washington Volcanic Ash Advisory Center (VAAC)
Report for Galeras
Based on visual observations during clear weather, INGEOMINAS reported that steam-and-ash plumes from Galeras rose to a maximum altitude of 5.7 km (18,700 ft) a.s.l. during 29 October-4 November. The Alert Level remained at 3 (changes in the behavior of volcanic activity have been noted) on a scale of 4-1.
Source: Servicio Geológico Colombiano (SGC)
Report for Jebel at Tair
Since the beginning of an eruption of Jebel at Tair on 30 September, the MODIS satellite detected thermal anomalies over the island every day through 6 November.
Source: Hawai'i Institute of Geophysics and Planetology (HIGP) Thermal Alerts Team
Report for Karymsky
KVERT reported that seismic activity at Karymsky was above background levels during 25-28 October and at background levels during 29 October-2 November. Based on seismic interpretation, ash explosions occurred. Cloud cover obscured observations of satellite imagery. The Level of Concern Color Code remained at Orange.

Based on information from KEMSD, the Tokyo VAAC reported that an eruption plume rose to an altitude of 5.2 km (17,000 ft) a.s.l. during 18-21 October. Ash was not detected on satellite imagery.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
HVO reported that during 31 October-6 November fissure segment D from Kilauea's 21 July fissure eruption continued to feed an advancing lava flow that frequently overflowed its channel edges. Small breakouts from a lava tube continued to slowly burn a kipuka about 1.2 km N of the main channel's end. An E-traveling lava tube supplied flows that burned into a small kipuka and forested areas. A few small earthquakes were located beneath the summit area, Halema'uma'u crater, and along the E rift zone and S-flank faults during the reporting period. During 3-4 November, an unusually large number of earthquakes were located beneath the S-flank faults. Tremor remained low below the summit and Pu'u 'O'o crater.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Rabaul
RVO reported that white plumes occasionally accompanied by ash plumes from Rabaul caldera's Tavurvur cone rose to altitudes of 1.7-2.7 km (5,600-8,900 ft) a.s.l. during 2-5 November. Plumes drifted N, NW, and W. Ashfall was reported in Rabaul town and surrounding areas. A strong smell of hydrogen-sulfide gas was reported and occasional incandescence at the summit was observed.
Source: Rabaul Volcano Observatory (RVO)
Report for Semeru
Based on reports from CVGHM, the Darwin VAAC reported that an unconfirmed eruption from Semeru was heard from 17 km away on 31 October. An eruption plume was not detected on satellite imagery.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Sheveluch
KVERT reported that seismic activity at Shiveluch was above background levels during 26 October-2 November. Based on seismic interpretation, ash plumes rose to an altitude of 6.8 km (22,300 ft) a.s.l. and small hot avalanches occurred. Observations of video footage indicated that ash and gas-and-steam plumes rose to altitudes of 5-5.3 km (16,400-17,400 ft) a.s.l. on 25, 26, and 31 October, and 1 November. Based on observations of satellite imagery, ash plumes drifted SE during 27-31 October and a thermal anomaly was present in the crater every day during the reporting period. The Level of Concern Color Code remained at Orange.

Based on information from KVERT and KEMSD, the Tokyo VAAC reported that eruption plumes rose to altitudes of 5.2-8.5 km (17,000-28,000 ft) a.s.l. during 4-6 November.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Soufriere Hills
MVO reported that during 31 October-5 November the lava dome at Soufrière Hills changed very little, based on limited visual observations due to cloud cover. Seismic activity was very low and low-level rockfall and pyroclastic flow activity continued. 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 31 October-6 November 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 although visual observations were limited due to cloud cover, ash-and-steam and ash plumes from Tungurahua rose to altitudes of 5.5-8 km (18,000-26,200 ft) a.s.l. during 31 October-6 November. Plumes drifted NNE, N, NW, W, and SW, and occasionally followed explosions. Ashfall was reported from areas downwind every day during the reporting period. On 31 October and 3 November, roars were heard. Incandescence and incandescent blocks at the summit were observed on 1, 2, and 5 November. On 4 November, the road to Baños in the La Pampas sector to the S was temporarily closed due to lahars.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Report for Ubinas
Based on Significant Meteorological Information (SIGMET) advisories and observations of satellite imagery, the Buenos Aires VAAC reported that ash plumes from Ubinas rose to altitudes of 5.5-7.6 km (18,000-25,000 ft) a.s.l. during 1 and 3-6 November. Plumes drifted NE and SE.
Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)