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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 11 February-17 February 2009
Name Country Eruption Start Date Report Status
Asamayama Japan New
Ebeko Russia 2022 Jun 11 New
Galeras Colombia New
Redoubt United States New
Aira Japan 2017 Mar 25 Continuing
Arenal Costa Rica Continuing
Dukono Indonesia 1933 Aug 13 Continuing
Karymsky Russia Continuing
Kilauea United States Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Rabaul Papua New Guinea Continuing
Santa Maria Guatemala 1922 Jun 22 Continuing
Sheveluch Russia 1999 Aug 15 Continuing
Shishaldin United States Continuing
Soufriere Hills United Kingdom 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 Asamayama
Based on information from JMA, the Tokyo VAAC reported that during 11-12 February eruptions from Asama produced plumes that rose to altitudes of 3-3.7 km (10,000-12,000 ft) a.s.l. and drifted NE, E, and SE. JMA reported that on 16 and 17 February eruptions produced colored plumes containing ash that rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted E. Incandescence in the crater was seen on web cameras.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Japan Meteorological Agency (JMA)
Report for Ebeko
Based on analysis of satellite imagery and information from Yelizovo Airport, the Tokyo VAAC reported that on 11 February an ash plume drifted NE from Ebeko at an altitude of 0.6 km (2,000 ft) a.s.l. On 17 February, an ash plume drifted SW at an altitude of 1.2 km (4,000 ft) a.s.l.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Galeras
INGEOMINAS reported an explosive eruption from Galeras that began at 1910 on 14 February; the Alert Level was raised from III (Yellow; "changes in the behavior of volcanic activity") to I (Red; "imminent eruption or in progress"), on a scale of 4-1. An accompanying shock wave was detected in multiple areas, including in parts of Pasto (about 10 km E). The altitude of the resultant ash plume was not known nor observed on satellite images due to cloud cover. From about 1930 until 2030 ashfall, rain, and an odor of sulfur gas were reported on the slopes of the volcano as well as in Pasto. Ash deposits were mainly in areas to the E and as far away as 25 km. Seismicity returned at 1950 to similar levels recorded prior to the eruption and remained low. On 16 February, the Alert Level was lowered to II (Orange; "probable eruption in term of days or weeks"). During 16-17 February, small steam plumes rose to altitudes of 4.6-6.7 km (15,100-22,000 ft) a.s.l. and drifted SE, E, and NE.

According to news articles, authorities ordered the evacuation of about 8,000 people living on the slopes, but few went to evacuation shelters.
Sources: Caracol Radio, Servicio Geológico Colombiano (SGC), Agence France-Presse (AFP)
Report for Redoubt
AVO reported that during 10-17 February seismic activity at Redoubt was variable but remained elevated above background levels. Web camera views were often obscured by snow, clouds, or ice on the camera housing. On 10 February, scientists noted that the outflow stream on the W side of Drift Glacier was frozen.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Aira
Based on analysis of satellite imagery and pilot observations, the Tokyo VAAC reported that during 11-12 February ash plumes from Sakura-jima rose to altitudes of 1.2-1.5 km (4,000-5,000 ft) a.s.l.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Arenal
OVSICORI-UNA reported that during January, activity originating from Arenal's Crater C consisted of gas emissions, sporadic Strombolian eruptions, and occasional avalanches from lava-flow fronts that traveled down the SW flanks. Volcanic activity was at relatively low levels and few eruptions occurred. Acid rain and small amounts of ejected pyroclastic material affected the NE and SE flanks. Eruptions produced ash plumes that rose about 2.2 km (7,100 ft) a.s.l. Small avalanches of volcanic material traveled down several ravines. Crater D showed only fumarolic activity.
Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
Report for Dukono
Based on analysis of satellite imagery, the Darwin VAAC reported that an ash plume from Dukono drifted SE at an altitude of 3 km (10,000 ft) a.s.l. on 11 February.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Karymsky
KVERT reported that seismic activity at Karymsky was above background levels during 6-9 February and at background levels during 10-13 February. Ash explosions produced plumes that rose to an altitude of 2.5 km (8,200 ft) a.s.l. Clouds prevented satellite observations. The Level of Concern Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
HVO reported that during 11-17 February lava flowed SE from underneath Kilauea's Thanksgiving Eve Breakout (TEB) and rootless shield complex through a lava tube system, reaching the Waikupanaha and Waha'ula ocean entries. On most days, multiple explosions and spatter at the ocean entry were seen. On 11 February, geologists found a new littoral cone, on the edge of the bench, with a large crack running through it. Spatter on the cone and the bench behind it resulted from lava bubble bursts and steam jetting reported during the previous two days. A second crack between the cone and the sea cliff was also noted. The cracks suggested that the bench was slowly failing and did not collapse as reported a few days prior. Occasional incandescence originated from the Prince lobe, the flow that feeds the Waha'ula ocean entry. Thermal anomalies suggesting surface flows were noted on the coastal plain and on the pali.

The vent in Halema'uma'u crater continued to produce a predominantly white plume that drifted mainly SW; incandescence was intermittently seen from the vent. Small amounts of tephra, including Pele's hair and some spatter, were routinely collected. Infrared images taken during an overflight on 11 February revealed the development of a small spattering cone over the conduit that hosted a lava pond the previous week. Images taken on 14 February indicated that the conduit had mostly crusted over; a small, puffing vent was visible. The sulfur dioxide emission rate at the summit was 800 tonnes per day on 12 February, and 500 tonnes on 13 February; the 2003-2007 average rate was 140 tonnes per day.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Popocatepetl
CENAPRED reported that emissions of steam and gas from Popocatépetl were visible during 11-17 February; the plumes occasionally contained slight amounts of ash. On 13 February, a plume with low ash content rose to an altitude of 7.2 km (23,600 ft) a.s.l. and drifted NE at 2230; 95 minutes of increased seismicity followed.
Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), Washington Volcanic Ash Advisory Center (VAAC)
Report for Rabaul
Based on analysis of satellite imagery, the Darwin VAAC reported that during 13-14 February ash plumes from Rabaul caldera's Tavurvur cone rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted SE and W. On 17 February, a low-level ash plume drifted SE.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Santa Maria
Based on analysis of satellite imagery, the Washington VAAC reported that on 12 February ash puffs from Santa María's Santiaguito lava dome complex drifted WSW and W. On 16 and 17 February, INSIVUMEH reported that explosions produced ash plumes that rose to altitudes of 2.7-3.3 km (8,900-10,800 ft) a.s.l. and drifted SW. Small pyroclastic flows on 16 February descended the SE flank and reached the Nima I river. On 17 February, incandescent avalanches were noted and fumarolic plumes drifted SW.
Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC)
Report for Sheveluch
KVERT reported that seismic activity at Shiveluch was above background levels during 6-13 February. Based on interpretations of seismic data, ash plumes likely rose to altitudes of 5.5 km (18,000 ft) a.s.l. Lava flows continued to be active on the S and N flanks. Analysis of satellite imagery revealed a thermal anomaly on the lava dome during 6 and 8-10 February; clouds prevented observations on the other days during the reporting period. The Level of Concern Color Code remained at Orange.

Based on information from KEMSD, the Tokyo VAAC reported that an eruption on 12 February produced a plume that rose to an altitude of 4.6 km (15,000 ft) a.s.l.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Shishaldin
AVO reported that seismic activity from Shishaldin had returned to background levels in December 2008 and remained low. On 3 February, a weak thermal anomaly was detected on satellite imagery. The Aviation Color Code was lowered to Green and the Volcano Alert Level was lowered to Normal on 11 February.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Soufriere Hills
MVO reported that during 6-13 February activity from the Soufrière Hills lava dome was at a low level. Two rockfalls were detected and seismicity was low. On 13 February, one small pyroclastic flow that originated in a gully on the N side of the lava dome traveled less than 1 km. The Hazard Level remained at 4.
Source: Montserrat Volcano Observatory (MVO)
Report for Tungurahua
The IG reported that although visual observations of Tungurahua were occasionally limited due to cloud cover; gas-and-ash plumes were seen and rose to altitudes of 5.5-7.5 km (18,000-24,600 ft) a.s.l. during 11-17 February. Plumes drifted W, NE, E, and SE. On 11 February, small lahars descended multiple gorges to the NW and S. Incandescence in the crater was seen at night on 11 and 12 February, and roaring was heard on 12 and 16 February. Ashfall was reported in areas to the SW on 12 February and to the N on 14 February. An explosion on 16 February that vibrated windows was followed by ash emissions that generated a plume to an altitude of 8 km (26,200 ft) a.s.l. The plume drifted W.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Report for Ubinas
INGEMMET reported that although cloud cover occasionally prevented visual observations of Ubinas, steam and steam-and-ash plumes were seen during 11-16 February and rose to altitudes of 5.7-6.5 km (18,700-21,300 ft) a.s.l. The plumes drifted NE, N, W, and SW.
Source: Instituto Geológico Minero y Metalúrgico (INGEMMET)