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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 3 February-9 February 2010
Name Location Eruption Start Date Report Status
Bezymianny Central Kamchatka (Russia) 2010 May 21 (?) New
Fukutoku-Oka-no-Ba Volcano Islands (Japan) New
Pacaya South-Central Guatemala New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Dukono Halmahera 1933 Aug 13 Continuing
Galeras Colombia Continuing
Karymsky Eastern Kamchatka (Russia) Continuing
Kilauea Hawaiian Islands (USA) 2021 Sep 29 Continuing
Klyuchevskoy Central Kamchatka (Russia) Continuing
Sarychev Peak Matua Island (Russia) Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Soufriere Hills Montserrat Continuing
Suwanosejima Ryukyu Islands (Japan) 2004 Oct 23 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 18,389 individual reports over 1,142 weeks (average of 16 per week) on 328 different volcanoes.

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Agung Cotopaxi Iliamna Little Sitkin Planchon-Peteroa Stromboli
Ahyi Cuicocha Iliwerung Llaima Poas Sulu Range
Aira Cumbal Inielika Lokon-Empung Popocatepetl Sumbing
Akan Dabbahu Ioto Lonquimay Purace Sundoro
Alaid Davidof Irazu Lopevi Puyehue-Cordon Caulle Suretamatai
Alu-Dalafilla Dempo Iya Machin Rabaul Suwanosejima
Ambae Descabezado Grande Izu-Torishima Makushin Raikoke Taal
Ambang Dieng Volcanic Complex Jackson Segment Maly Semyachik Ranakah Tair, Jebel at
Ambrym Dukono Kaba Manam Raoul Island Takawangha
Anatahan Ebeko Kadovar Manda Hararo Rasshua Talang
Aniakchak Ebulobo Kaitoku Seamount Marapi Raung Tambora
Antillanca Volcanic Complex Edgecumbe Kama'ehuakanaloa Maroa Redoubt Tanaga
Antuco Egon Kambalny Martin Reventador Tandikat-Singgalang
Apoyeque Ekarma Kanaga Masaya Reykjanes Tangkoko-Duasudara
Arenal Epi Kanlaon Maule, Laguna del Rincon de la Vieja Tangkuban Parahu
Asamayama Erebus Karangetang Mauna Loa Rinjani Tara, Batu
Askja Erta Ale Karkar Mayon Ritter Island Ta'u
Asosan Etna Karthala McDonald Islands Rotorua Taupo
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Karymsky Melimoyu Ruang Telica
Augustine Eyjafjallajokull Kasatochi Merapi Ruapehu Tenerife
Avachinsky Fagradalsfjall Katla Midagahara Ruiz, Nevado del Tengger Caldera
Awu Fernandina Katmai Misti, El Sabancaya Three Sisters
Axial Seamount Fogo Kavachi Miyakejima Sakar Tinakula
Azul, Cerro Fonualei Kelimutu Momotombo Salak Tofua
Azumayama Fournaise, Piton de la Kelud Monowai San Cristobal Tokachidake
Bagana Fourpeaked Kerinci Montagu Island San Miguel Tolbachik
Balbi Fuego Ketoi Moyorodake [Medvezhia] San Vicente Toliman
Bamus Fujisan Kharimkotan Mutnovsky Sangay Tongariro
Banda Api Fukutoku-Oka-no-Ba Kick 'em Jenny Myojinsho Sangeang Api Trident
Bardarbunga Galeras Kie Besi Nabro Santa Ana Tungurahua
Barren Island Galunggung Kikai Negra, Sierra Santa Maria Turrialba
Batur Gamalama Kilauea Negro, Cerro Sao Jorge Ubinas
Bezymianny Gamkonora Kirishimayama Nightingale Island Sarigan Ugashik-Peulik
Bogoslof Gareloi Kita-Ioto Nishinoshima Sarychev Peak Ukinrek Maars
Brava Gaua Kizimen Nisyros Saunders Ulawun
Bristol Island Gorely Klyuchevskoy Novarupta Savo Unnamed
Bulusan Great Sitkin Kolokol Group NW Rota-1 Semeru Unnamed
Calbuco Grimsvotn Koryaksky Nyamulagira Semisopochnoi Veniaminof
Callaqui Guagua Pichincha Krakatau Nyiragongo Seulawah Agam Villarrica
Cameroon Guallatiri Krummel-Garbuna-Welcker Ofu-Olosega Sheveluch Vulcano
Campi Flegrei del Mar di Sicilia Guntur Krysuvik-Trolladyngja Okataina Shishaldin West Mata
Cayambe Hachijojima Kuchinoerabujima Okmok Simbo Westdahl
Chachadake [Tiatia] Hakoneyama Kurikomayama Ontakesan Sinabung Whakaari/White Island
Chaiten Heard Kusatsu-Shiranesan Oraefajokull Sinarka Witori
Chiginagak Hekla Kverkfjoll Osorno Siple Wolf
Chikurachki Helgrindur La Palma Pacaya Sirung Yakedake
Chiles-Cerro Negro Hierro Lamington Pagan Slamet Yasur
Chillan, Nevados de Hokkaido-Komagatake Lamongan Palena Volcanic Group Snaefellsjokull Yufu-Tsurumi
Chirinkotan Home Reef Langila Paluweh Soputan Zaozan [Zaosan]
Chirpoi Hood Lanin Panarea Sorikmarapi Zavodovski
Ciremai Huaynaputina Lascar Papandayan Sotara Zhupanovsky
Cleveland Hudson, Cerro Lateiki Parker Soufriere Hills Zubair Group
Colima Huila, Nevado del Lengai, Ol Doinyo Pavlof Soufriere St. Vincent
Colo Hunga Tonga-Hunga Ha'apai Leroboleng Pelee South Sarigan Seamount
Concepcion Ibu Lewotobi Peuet Sague Spurr
Copahue Ijen Lewotolok Pinatubo St. Helens
 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 Bezymianny
KVERT reported that during 29-30 January and 2 February a thermal anomaly from Bezymianny's lava dome was detected in satellite imagery. The anomaly was larger during 7-8 February, prompting KVERT to raise the Level of Aviation Color Code to Orange. Strong activity from Kliuchevskoi volcano had obscured seismic signals from Bezymianny since 4 January.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Fukutoku-Oka-no-Ba
According to news articles, JMA reported Surtseyan explosions from Fukutoku-Okanoba, 5 km NE of the island of Minami-Iwo-jima, on 3 February. Steam-and-ash plumes rose 100 m a.s.l. and the surrounding sea turned yellow-green. Video footage of the event was captured by people aboard a Japanese Coast Guard patrol boat. One article stated that the sea in the area had regularly changed colors since the 1950s, most recently in December 2009.
Sources: The Mainichi Daily News, ITN News
Report for Pacaya
INSIVUMEH reported that activity from Pacaya consisting of effusion of lava flows, the source of which had migrated towards the S from the N flank since April 2006, ceased on 30 January 2010. On 5 February, Strombolian explosions from MacKenney cone ejected material 30 m into the air and lava from the crater moved down the flank. The activity was heard in the village of San Francisco de Sales, 5 km N. A new lava flow originating from a depression on the NE flank was seen on 6 February.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Aira
Based on information from JMA, the Tokyo VAAC reported that during 3-9 February multiple explosions from Sakura-jima produced plumes that rose to altitudes of 1.5-3 km (5,000-10,000 ft) a.s.l. and drifted SE and N. On 5, 6, and 7 February, pilots reported that ash plumes sometimes drifted SE and S at altitudes of 1.5-3.4 km (5,000-11,000 ft) a.s.l. An eruption on 8 February produced an estimated 1-km-high lava fountain, and an ash plume with abundant lightning. Incandescent material fell onto the flanks.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kago-Net
Report for Dukono
The Darwin VAAC reported that during 5-6 February ash plumes from Dukono rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 55-150 km SW and W.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Galeras
On 9 February, INGEOMINAS lowered the Alert Level for Galeras to III (Yellow; "changes in the behavior of volcanic activity"). During the previous few days, seismicity was low and sulfur dioxide emissions were low to moderate.
Source: Servicio Geológico Colombiano (SGC)
Report for Karymsky
KVERT reported that during 29 January-5 February seismic activity from Karymsky was above background levels and possibly indicated weak ash explosions. Analyses of satellite imagery revealed a thermal anomaly over the volcano on 28 January and 1 February. The Level of Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
During 3-9 February, HVO reported an active lava surface about 200 m below a vent in the floor of Kilauea's Halema'uma'u crater. The lava surface occasionally spattered, and both rose and drained through holes in the cavity floor. A plume from the vent drifted mainly SW, dropping small amounts of ash, and occasionally fresh spatter, downwind. Measurements indicated that the sulfur dioxide emission rate at the summit remained elevated; 1,200 and 700 tonnes per day were measured on 4 and 8 February, respectively. The 2003-2007 average rate was 140 tonnes per day.

Lava from beneath the Thanksgiving Eve Breakout (TEB) and rootless shield complex flowed over 3 km SE through a lava tube system before breaking out onto the surface. Thermal anomalies detected by satellite and visual observations revealed active lava flows above and on the pali, and on the coastal plain. By 8 February, pahoehoe lava flows had advanced 700 m from the base of the pali S onto the coastal plain. Incandescence was sometimes seen from a vent low on the S wall of Pu'u 'O'o crater.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Klyuchevskoy
KVERT reported that during 29 January-5 February seismic activity from Kliuchevskoi was above background levels and lava continued to flow down the NW flank. Strombolian activity periodically ejected material 300 m above the crater, and phreatic explosions occurred from the front of the lava flow. Satellite imagery revealed a large daily thermal anomaly at the volcano. On 30 and 31 January, gas-and-steam plumes rose to an altitude of 6.2 km (20,300 ft) a.s.l. The Level of Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Sarychev Peak
SVERT reported that a thermal anomaly on Sarychev Peak was detected by satellite on 3 February.
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Sheveluch
KVERT reported that during 29 January-5 February seismic activity from Shiveluch was above background levels, possibly indicating ash plumes rising to an altitude of 5.7 km (18,700 ft) a.s.l. Fumarolic activity was observed on 1 February; cloud cover prevented observations on other days. Analyses of satellite imagery revealed a large daily thermal anomaly from the lava dome. The Level of Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Soufriere Hills
MVO reported that during 29 January-5 February activity from the Soufrière Hills lava dome was variable as the lava dome continued to grow. Cycles of vigorous ash venting, rockfalls, and pyroclastic flows occurred every seven to twelve hours. Pyroclastic flows traveled mostly W down Gages into Spring Ghaut, as far as 3 km, but also occurred in Whites Ghaut to the NE. Rockfall activity was abundant on the N flank. On 4 February, ash fell across NW Montserrat. Observations the next day revealed that the central W part of the lava dome had grown and was 1,070 m a.s.l.

Pyroclastic flows following a Vulcanian explosion on 5 February traveled W, reaching Plymouth and spreading 500 m across the sea. Pyroclastic flows also traveled as far as 2 km NW down Tyers Ghaut and NE down Whites Ghaut. An ash plume rose to an altitude of 6.4 km (21,000 ft) a.s.l. A small Vulcanian explosion on 8 February generated pyroclastic flows that mostly traveled W down Gages Valley. Small pyroclastic surges observed using a thermal camera descended the N flanks. An ash plume rose to an altitude of 4.6 km (15,000 ft) a.s.l. and drifted E and ENE. Ashfall was reported in NW Montserrat and in SW Antigua, 50 km NW. The Hazard Level remained at 4.
Source: Montserrat Volcano Observatory (MVO)
Report for Suwanosejima
Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 5-6 and 9 February. Details of possible resulting emissions were not reported.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Tungurahua
The IG reported that 14-51 explosions from Tungurahua were detected by the seismic network during 3-9 February. Inclement weather often prevented observations of the volcano; an ash plume was seen rising to an altitude of 7 km (23,000 ft) a.s.l. Ashfall was noted almost daily in areas to the SW, W, and NW, and was particularly heavy towards the end of the reporting period. Roaring noises and sounds resembling "cannon shots" were heard. Explosions sometimes caused windows and structures to vibrate, including large windows at the Tungurahua Observatory (OVT) in Guadalupe, 11 km N. Occasionally at night incandescence emanated from the crater and incandescent blocks rolled down the flanks as far as 1 km. On 3 February lahars descended drainages to the W and SW, carrying tree trunks and blocks up to 1 m in diameter, and causing the road from Riobamba to Baños to close. Strombolian activity from the crater was seen during 6-8 February.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)