All times are local unless otherwise stated.

Anatahan (United States) | 9 February-15 February 2005 | Continuing ActivityCite this Report
Anatahan Mariana Volcanic Arc	During 10-13 February, frequent Strombolian explosions continued at Anatathan, but slowly declined to about 5-10% of the peak levels attained during the current eruption. During the report period, ash rose as high as ~6 km a.s.l. Source: Emergency Management Office of the Commonwealth of the Mariana Islands and United States Geological Survey Volcano Hazards Program
Colima (Mexico) | 9 February-15 February 2005 | Continuing ActivityCite this Report
Colima Trans-Mexican Volcanic Arc	During 9-15 February, several small explosions at Colima sent ash to low altitudes. An explosion on 12 February was accompanied by a pyroclastic flow that traveled ~2.5 km SE down the Montegrande and San Antonio ravines (See video of the event). Source: Centro Universitario de Estudios Vulcanológicos (CUEV) - Universidad de Colima
Ebeko (Russia) | 9 February-15 February 2005 | Continuing ActivityCite this Report
Ebeko Kuril Volcanic Arc	On 7 February a small emission of steam, gas, and possibly ash from Ebeko rose ~1 km above the volcano's crater and drifted ~12 km SE. On 8 and 9 February plumes rose to 600 m and thin ash deposits were noted in the town of Severo-Kurilsk, ~7 km from the volcano. Ebeko remained at Concern Color Code Yellow . Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Egon (Indonesia) | 9 February-15 February 2005 | Continuing ActivityCite this Report
Egon Sunda Volcanic Arc	An explosion at Egon on 14 February at 1830 produced a plume to an unknown height. Egon remained at Alert Level 4, the highest level. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Kilauea (United States) | 9 February-15 February 2005 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 9-15 February, Kilauea's PKK lava flow continued to enter the sea and surface lava was visible on the Pulama pali fault scarp. A few small earthquakes occurred at Kilauea's summit and no tremor was recorded there. Volcanic tremor remained at moderate levels at Pu`u `O`o. A small amount of deformation was recorded at the volcano. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Klyuchevskoy (Russia) | 9 February-15 February 2005 | Continuing ActivityCite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	During 4-11 February, seismicity was above background levels at Kliuchevskoi and ash plumes rose above the volcano. On 6, 8, and 9 February, ash plumes rose ~2.5 km above the volcano's crater. Gas-and-steam plumes rose to ~3 km during 6-9 February. A cinder cone was noted in the volcano's crater on 6 February. Fresh ash deposits were seen on the SW flank of Ushkovsky volcano (NW of Kliuchevskoi) on 7 February, and in the town of Kluchi on 9 February. During 31 January to 9 February, Strombolian activity occurred in the terminal crater of Kliuchevskoi and a lava flow traveled into Krestovsky channel on the volcano's NW flank. Phreatic bursts occurred in this channel when a lava flow contacted glaciers during 6-9 February. Kliuchevskoi remained at Concern Color Code Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Manam (Papua New Guinea) | 9 February-15 February 2005 | Continuing ActivityCite this Report
Manam Bismarck Volcanic Arc	Based on information from RVO, the Darwin VAAC reported that emissions from Manam continued during 9-15 February. The Alert Level at Manam was reduced from 3 to 2 around 15 February. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Sheveluch (Russia) | 9 February-15 February 2005 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	Seismicity at Shiveluch was above background levels during 4-11 February, with weak shallow earthquakes occurring beneath the active dome. On 6 February a pyroclastic flow traveled ~2 km down the volcano's flank. Based on interpretations of seismic data, ash-and-gas explosions may have risen to 5.1 km a.s.l. on 6, 7, and 9 February. Weak ash-and-gas explosions and hot avalanches possibly occurred during the week. Ash-and-gas plumes were seen rising to 2.4 km above the lava dome. Shiveluch remained at Concern Color Code Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
St. Helens (United States) | 9 February-15 February 2005 | Continuing ActivityCite this Report
St. Helens High Cascades Volcanic Arc	During 9-15 February, growth of the new lava dome inside the crater of St. Helens continued, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. Gas emissions were unchanged in comparison to recent measurements. On 14 and 15 February, the GPS instrument installed on the new lava dome moved an average of 6 m per day mostly southeastward with an upward component of about 1 m per day. St. Helens remained at Volcano Advisory (Alert Level 2); aviation color code Orange. Source: US Geological Survey Cascades Volcano Observatory (CVO)
Tungurahua (Ecuador) | 9 February-15 February 2005 | Continuing ActivityCite this Report
Tungurahua Northern Andean Volcanic Arc	Volcanic and seismic activity were at low levels at Tungurahua during 9-14 February. Low-energy gas-and-steam plumes were emitted and long-period earthquakes were recorded. Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Veniaminof (United States) | 9 February-15 February 2005 | Continuing ActivityCite this Report
Veniaminof Aleutian Ridge Volcanic Arc	Low-level Strombolian eruptive activity continued at Veniaminof during 4-11 February. On 9 February, an ash burst rose hundreds of meters above the intracaldera cone. Satellite images continued to show a thermal anomaly in the vicinity of the intracaldera cone, consistent with the presence of hot material at the vent. Seismicity remained above background levels at the volcano. On the morning of 10 February there was a distinct increase in the amplitude and frequency of earthquakes. The increase continued through 11 February. This activity was consistent with more energetic explosions from the active cone, however there were no indications that the bursts rose higher than 4 km a.s.l. Veniaminof remained at Concern Color Code Orange. Source: US Geological Survey Alaska Volcano Observatory (AVO)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 21,469 individual reports over 1,278 weeks (average of 17 per week) on 339 different volcanoes.

Use the dropdowns to choose the year and week for archived Weekly Reports.

 News Feeds and Google Placemarks

 Criteria & Disclaimers

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.

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)