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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 10 November-16 November 2004
Name Location Eruption Start Date Report Status
Asamayama Honshu (Japan) New
Manam Papua New Guinea 2014 Jun 29 New
Colima Mexico Continuing
Fuego Guatemala 2002 Jan 4 Continuing
Kilauea Hawaiian Islands (USA) Continuing
Ruapehu North Island (New Zealand) Continuing
Santa Maria Guatemala 1922 Jun 22 Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Soufriere Hills Montserrat Continuing
Spurr United States Continuing
St. Helens United States Continuing
Tungurahua Ecuador Continuing
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 16,153 individual reports over 1,038 weeks (average of 16 per week) on 307 different volcanoes.

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Agung Concepcion Ibu Lewotolo Parker Soufriere Hills
Ahyi Copahue Ijen Little Sitkin Pavlof Soufriere St. Vincent
Aira Cotopaxi Iliamna Llaima Peuet Sague South Sarigan Seamount
Akan Cuicocha Iliwerung Loihi Pinatubo Spurr
Alaid Cumbal Inielika Lokon-Empung Planchon-Peteroa St. Helens
Alu-Dalafilla Dabbahu Ioto Lopevi Poas Stromboli
Ambae Dempo Irazu Machin Popocatepetl Sulu Range
Ambang Descabezado Grande Iya Makian Puyehue-Cordon Caulle Sumbing
Ambrym Dieng Volcanic Complex Izu-Torishima Makushin Rabaul Sundoro
Anatahan Dukono Jackson Segment Maly Semyachik Raikoke Suretamatai
Antillanca Volcanic Complex Ebeko Kaba Manam Ranakah Suwanosejima
Antuco Ebulobo Kadovar Manda Hararo Raoul Island Taal
Apoyeque Egon Kambalny Marapi Rasshua Tair, Jebel at
Arenal Ekarma Kanaga Maroa Raung Takawangha
Asamayama Epi Kanlaon Martin Redoubt Talang
Askja Erebus Karangetang Masaya Reventador Tambora
Asosan Erta Ale Karkar Maule, Laguna del Reykjanes Tanaga
Augustine Etna Karthala Mauna Loa Rincon de la Vieja Tandikat-Singgalang
Avachinsky Etorofu-Yakeyama [Grozny Group] Karymsky Mayon Rinjani Tangkoko-Duasudara
Awu Eyjafjallajokull Kasatochi McDonald Islands Ritter Island Tangkuban Parahu
Axial Seamount Fernandina Katla Melimoyu Rotorua Tara, Batu
Azul, Cerro Fogo Katmai Merapi Ruang Telica
Azumayama Fonualei Kavachi Midagahara Ruapehu Tenerife
Bagana Fournaise, Piton de la Kelimutu Misti, El Ruiz, Nevado del Tengger Caldera
Balbi Fourpeaked Kelut Miyakejima Sabancaya Three Sisters
Bamus Fuego Kerinci Momotombo Sakar Tinakula
Banda Api Fujisan Ketoi Monowai Salak Tofua
Bardarbunga Fukutoku-Oka-no-Ba Kharimkotan Montagu Island San Cristobal Tokachidake
Barren Island Galeras Kick 'em Jenny Moyorodake [Medvezhia] San Miguel Tolbachik
Batur Galunggung Kikai Mutnovsky San Vicente Toliman
Bezymianny Gamalama Kilauea Myojinsho Sangay Tongariro
Bogoslof Gamkonora Kirishimayama Nabro Sangeang Api Tungurahua
Brava Gaua Kizimen Negra, Sierra Santa Ana Turrialba
Bristol Island Gorely Klyuchevskoy Negro, Cerro Santa Maria Ubinas
Bulusan Great Sitkin Kolokol Group Nightingale Island Sarigan Ulawun
Calbuco Grimsvotn Korovin Nishinoshima Sarychev Peak Unnamed
Callaqui Guagua Pichincha Koryaksky Nisyros Saunders Unnamed
Cameroon Guallatiri Krakatau Novarupta Semeru Veniaminof
Campi Flegrei del Mar di Sicilia Guntur Krummel-Garbuna-Welcker NW Rota-1 Semisopochnoi Villarrica
Cayambe Hachijojima Kuchinoerabujima Nyamuragira Seulawah Agam West Mata
Cereme Hakoneyama Kurikomayama Nyiragongo Sheveluch Westdahl
Chachadake [Tiatia] Heard Kusatsu-Shiranesan Okataina Shishaldin Whakaari/White Island
Chaiten Hekla Kverkfjoll Okmok Simbo Witori
Chiginagak Helgrindur Lamington Ontakesan Sinabung Wolf
Chikurachki Hierro Lamongan Oraefajokull Sinarka Yasur
Chiles-Cerro Negro Hokkaido-Komagatake Langila Osorno Siple Zaozan [Zaosan]
Chillan, Nevados de Home Reef Lanin Pacaya Sirung Zavodovski
Chirinkotan Hood Lascar Pagan Slamet Zhupanovsky
Chirpoi Huaynaputina Lateiki Palena Volcanic Group Snaefellsjokull Zubair Group
Cleveland Hudson, Cerro Lengai, Ol Doinyo Paluweh Soputan
Colima Huila, Nevado del Leroboleng Panarea Sorikmarapi
Colo Hunga Tonga-Hunga Ha'apai Lewotobi Papandayan Sotara
 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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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 Asamayama
According to news reports, Asama volcano erupted with a loud explosion 14 November at 2059. The Japan Meteorological Agency rated the eruption as mid-sized, 3 on a scale of 5 in terms of power of the explosion. The agency issued a warning of falling ash in areas downwind of the volcano, although no ash plume was observed due to cloudy weather conditions. Following the explosion, falling rocks were observed over a large area on the slopes of the volcano. There were no immediate reports of injuries or damage.

The Tokyo VAAC issued a volcanic ash advisory following the eruption.
Sources: Associated Press, Kyodo News, Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Manam
Rabaul Volcanological Observatory reported a Strombolian eruption at Manam volcano that began 10 November at 2200 and lasted until 11 November at 1915. There was some fluctuation in intensity during the course of the eruption. The ash column from the eruption was estimated to have risen ~5-6 km above the crater, and perhaps rose as high as ~9 km above the crater at around 1732 according to an Air Niugini pilot account. The ash activity was accompanied by continuous weak to moderate roaring and rumbling noises and frequent loud explosions. Light ash and scoria fall was reported between Kolang 1 and Kuluguma villages. A moderate amount of ash fell during 11 November between Boakure 1 and Baliau villages.

During 10-16 November, the Darwin VAAC issued numerous volcanic ash advisories concerning plumes emitted from Manam that were visible on satellite imagery.
Sources: Rabaul Volcano Observatory (RVO), Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Colima
During 10-15 November, block-lava flows continued to travel down Colima's N, W, NW, and S flanks as they have since 30 September. Several explosions occurred daily during the report period. Block-and-ash flows spilling from the fronts of the advancing lava flows on the W flank remained within ~2 km of the summit.

According to the Washington VAAC, satellite imagery from 1615 on 10 November indicated a plume moving N from Colima to a height of ~5 km a.s.l. The plume, consisting mostly of steam and a little ash, was emitted around 1610; by 1745 it had drifted ~45 km N.
Sources: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima, Washington Volcanic Ash Advisory Center (VAAC)
Report for Fuego
During 10-15 November, avalanches of incandescent volcanic material continued towards the major ravines on the volcano's flanks. Avalanches occurred from the fronts of the lava flows. Sounds like that of a locomotive or airplane turbine were heard emanating from the active crater. Small explosions expelled incandescent lava to heights of 75-100 m above the crater. Steam plumes from fumarolic activity reach heights of ~500-600 m above the crater, extending ~4-7 km to the S and SW.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Kilauea
Lava from Kilauea's PKK flow continued to enter the sea during 10-16 November at a newly formed lava delta at the eastern Lae`apuki entry area. On 16 November the delta grew along a wide front, mostly near and W of the most seaward point. A new arm of the delta-feeding flow had formed ~100 m farther E. Two vigorously active tips of this new arm were within 180 m of the sea cliff just E of the new delta, and at their current rate of advance they could enter the sea within a day. All vents in the crater of Pu`u `O`o were incandescent during this period. Seismicity was weak at Kilauea's summit, with essentially no tremor recorded. Tremor was at moderate levels at Pu`u `O`o. No significant deformation occurred.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Ruapehu
Elevated levels of volcanic tremor continue at Ruapehu and may signal the start of another Crater Lake heating cycle. The Volcanic Alert Level remained at 1 (some signs of volcano unrest).
Source: GeoNet
Report for Santa Maria
During 10-15 November, weak-to-moderate explosions occurred at Santa María's Santiaguito lava-dome complex, causing the collapse of a small sector of the SW edge of the Caliente dome. A pyroclastic flow from that area was noted on 12 November. On 14 November at 2012, a tectonic earthquake caused a lava-flow collapse SW of the Caliente dome, triggering a pyroclastic flow that descended to the head of San Isidro ravine, an area of abundant accumulation of pyroclastic material and a known area for lahar initiation.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Sheveluch
Seismicity was above background levels at Shiveluch during 5-12 November, with weak shallow earthquakes occurring beneath the active lava dome. Based on interpretations of seismic data, possible ash-and-gas explosions up to 6.5-7 km a.s.l. were registered on 5, 7, 9, and 11 November. During the week gas-dominated plumes rose to ~4 km a.s.l. and those bearing ash rose to 3.5-6 km. Possible minor ash-and-gas explosions and hot avalanches also occurred. Shiveluch remained at Concern Color Code Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Soufriere Hills
During 8-15 November, volcanic and seismic activity at Soufrière Hills remained elevated. The seismic network recorded one rockfall and nine hybrid earthquakes. Weather conditions limited measurements of sulfur dioxide emissions during 8-15 November. Reliable data were only available for two days when the plume blew over the sensors, yielding SO2-flux estimates of 141 and 501 metric tons per day. Circumstances prevented visual status reports on the crater.
Source: Montserrat Volcano Observatory (MVO)
Report for Spurr
Elevated levels of seismicity continued to be recorded at Spurr during 5-12 November. A period of slightly increased seismicity occurred between 6-8 November when as many as three shallow earthquakes per hour were recorded. Since then, the level of seismicity had declined to an average of six earthquakes per day. No unusual activity was observed in satellite or web camera images. Spurr remained at Concern Color Code Yellow.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for St. Helens
Growth of the new lava dome inside the crater of St. Helens continued and was accompanied by intermittent emissions of steam and ash. When weather permitted during the report period, a plume was observed rising passively and drifting out of the crater. The plume occasionally contained minor ash, which fell on both the crater and flanks, darkening the snow.

Seismicity remained low compared to that observed early in this episode of unrest, consistent with continued slow uplift of the crater floor and surface extrusion of lava. Overnight on 16 November, three earthquakes in the M 2.5-2.8 range shook the crater floor, behavior considered typical during an episode of dome growth. The overall low rates of seismicity and gas emission suggested that the lava reaching the surface was gas-poor and unlikely to generate highly explosive eruptions in the near term.

Recent extrusion-rate estimates of ~4 cubic meters per second were slightly lower than those in mid-October. These rates, which are based on the volume of deformed crater floor and the amount of airborne sulfur dioxide measured during gas-monitoring flights, have uncertainties associated with their calculation. Volcanoes like St. Helens are expected to undergo slight variations in their extrusion rates during eruptive cycles. This change is small and does not indicate a notable change in the eruptive process.

Good viewing conditions on 10 November revealed continued growth of the lava dome. Current estimates are that the welt, the broad area of deformation, is about 600 m in diameter. The new lava dome, which occupies the central and western parts of the welt, is about 400 by 180 m. The highest point on the new lava dome is about 250 m above the former surface of the glacier that occupied that point in mid-September. Maximum surface temperatures on the new dome remain at about 700 degrees Celsius. GPS instruments on the welt show rates of movement of up to several meters per day, while GPS instruments on the 1980-86 lava dome show movements of up to 1-2 cm per day northward, away from the growing welt and new dome.

St. Helens remained at Volcano Advisory (Alert Level 2); aviation color code Orange.
Source: US Geological Survey Cascades Volcano Observatory (CVO)
Report for Tungurahua
Volcanic and seismic activity at Tungurahua during the report period were at relatively low levels, characterized by several long-period earthquakes and small to moderate explosions. Emissions mainly consisted of steam, gas, and small amounts of ash. On 15 November, incandescence was observed in the crater of the volcano and explosions generated steam columns with moderate ash content that rose ~2 km above the crater and drifted S.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)