All times are local unless otherwise stated.

Bezymianny | 10 February-16 February 2010 | New Activity / Unrest Cite this Report
Bezymianny Central Kamchatka (Russia)	KVERT reported that during 5-12 February a thermal anomaly from Bezymianny's lava dome was detected in satellite imagery. On 6 February a new hot lava flow from the lava dome was observed. Fumarolic activity was observed on 7 and 9 February. The Aviation Color Code level was lowered to Yellow. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Chachadake [Tiatia] | 10 February-16 February 2010 | New Activity / Unrest Cite this Report
Chachadake [Tiatia] Kunashir Island (Japan/Russia)	SVERT reported that a weak thermal anomaly from Tiatia was detected by satellite on 9 February. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Llaima | 10 February-16 February 2010 | New Activity / Unrest Cite this Report
Llaima Central Chile	Cameras operated by OVDAS-SERNAGEOMIN showed steam-and-gas plumes rising from Llaima's main crater during 20 January-9 February. Seismic signals (tremor and volcano-tectonic earthquakes) had characteristics that indicated fluid movement within the volcano's conduits. The Alert Level was raised to Yellow, Level 3. SERNAGEOMIN recommended that people stay at least 4 km away from the main crater. Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Soufriere Hills | 10 February-16 February 2010 | New Activity / Unrest Cite this Report
Soufriere Hills Montserrat	MVO reported that during 5-12 February activity from the Soufrière Hills lava dome increased significantly. Activity was concentrated on the W side of the lava dome during the first part of the week then shifted to the N side on 9 February. On 11 February part of the lava dome collapsed leaving a large collapse scar on the NE flank. Pyroclastic flows traveled NE and then, along with pyroclastic surges, across the sea at several places on the E side of Montserrat. Pyroclastic flow deposits covered several hundred meters of the coastline near the old Bramble airport, about 5 km NE. Pyroclastic flows also traveled NW into Tyers Ghaut and down the Belham valley as far a Cork Hill, 4 km NW. An ash plume rose to an altitude of 15.2 km (50,000 ft) a.s.l. and drifted E and then SE. Ashfall occurred in NE Montserrat, SW Antigua (50 km NW), Guadeloupe (65 km SE), and Dominica (145 km SE). According to news articles, flights in and out of the region were temporarily suspended due to the ash plumes. Sources: Agence France-Presse (AFP), Montserrat Volcano Observatory (MVO)
Ulawun | 10 February-16 February 2010 | New Activity / Unrest Cite this Report
Ulawun New Britain (Papua New Guinea)	Based on analyses of satellite imagery, the Darwin VAAC reported that during 14-15 February ash plumes from Ulawun drifted 45-95 km at altitudes of 2.4-3.7 km (8,000-12,000 ft) a.s.l. Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Aira | 10 February-16 February 2010 | Continuing ActivityCite this Report
Aira Kyushu (Japan)	Based on information from JMA, the Tokyo VAAC reported that during 11-16 February multiple explosions from Sakura-jima produced plumes that rose to altitudes of 1.5-2.7 km (5,000-9,000 ft) a.s.l. and drifted N, E, SE, and S. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Bagana | 10 February-16 February 2010 | Continuing ActivityCite this Report
Bagana Bougainville (Papua New Guinea)	Based on analyses of satellite imagery, the Darwin VAAC reported that during 11-15 February ash plumes from Bagana rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 20-150 km E and NE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Chaiten | 10 February-16 February 2010 | Continuing ActivityCite this Report
Chaiten Southern Chile	On 11 February, ODVAS-SERNAGEOMIN reported that a camera, installed 800 m from the center of Chaitén's lava-dome complex in late January, showed incandescence and gas emissions on 28 January. Seismicity had also increased during 21 January-3 February. The Alert Level remained at Red. Based on web camera views and analyses of satellite imagery, the Buenos Aires VAAC reported that a steam-and-gas plume drifted 25 km NW on 11 February at an altitude of 2.4 km (8,000 ft) a.s.l. Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Buenos Aires Volcanic Ash Advisory Center (VAAC)
Dukono | 10 February-16 February 2010 | Continuing ActivityCite this Report
Dukono Halmahera	The Darwin VAAC reported that on 10 February a plume from Dukono was seen on satellite imagery drifting 150 km SW at an altitude of 2.4 km (8,000 ft) a.s.l. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karangetang | 10 February-16 February 2010 | Continuing ActivityCite this Report
Karangetang Sangihe Islands	On 12 February, CVGHM reported that seismicity from Karangetang declined during 1 January-8 February. When the weather was clear, white plumes were seen rising 100-200 m above the crater rim. Incandescent material was ejected 10-50 m above the Utama Crater. Based on these observations and the decline in seismicity, CVGHM lowered the Alert level to 2 (on a scale of 1-4). Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Karymsky | 10 February-16 February 2010 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka (Russia)	KVERT reported that during 5-12 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 8 February; meteorological clouds prevented observations on other days. The Aviation Color Code level remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea | 10 February-16 February 2010 | Continuing ActivityCite this Report
Kilauea Hawaiian Islands (USA)	During 10-16 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 on 11 February indicated that the sulfur dioxide emission rate at the summit remained elevated at 900 tonnes per day. The 2003-2007 average rate was 140 tonnes per day. That same day a significant rockfall or collapse event was followed by a brown plume for several minutes. 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 on the pali and on 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)
Klyuchevskoy | 10 February-16 February 2010 | Continuing ActivityCite this Report
Klyuchevskoy Central Kamchatka (Russia)	KVERT reported that during 5-12 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. Steam plumes rose to an altitude of 6 km (19,700 ft) a.s.l. on 8, 9, and 10 February, and were seen on satellite imagery drifting 65 km NE. Satellite imagery also revealed a large daily thermal anomaly at the volcano. The Aviation Color Code level remained at Orange. Based on information from KVERT and analyses of satellite imagery, the Tokyo VAAC reported that on 13 February an ash plume rose to an altitude of 6.4 km (21,000 ft) a.s.l. and drifted NW. Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Nevado del Huila | 10 February-16 February 2010 | Continuing ActivityCite this Report
Nevado del Huila Colombia	INGEOMINAS reported that during 10-16 February whitish gas plumes from Nevado del Huila were seen through the web camera rising no more than 2 km above the lava domes. The rate of sulfur dioxide emissions was 945 and 4,130 tonnes per day on 10 and 16 February, respectively. During an overflight on 12 February scientists saw gas emissions and thermal anomalies on the high part of the dome. Based on analyses of images, the volume of the extruded lava dome was an estimated 70 million cubic meters. The Alert Level remained at III (Yellow; "changes in the behavior of volcanic activity"). Source: Servicio Geológico Colombiano (SGC)
Pacaya | 10 February-16 February 2010 | Continuing ActivityCite this Report
Pacaya South-Central Guatemala	On 10 February, INSIVUMEH reported that lava flows from Pacaya, descending the flanks since April 2006, continued to flow down the E flank onto part of the meseta. During 11-16 February, lava flows 100-400 m long descended the E and NE flanks. Avalanches of blocks from the lava-flow fronts set fire to local vegetation. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sheveluch | 10 February-16 February 2010 | Continuing ActivityCite this Report
Sheveluch Central Kamchatka (Russia)	KVERT reported that during 5-12 February seismic activity from Shiveluch was above background levels, possibly indicating ash plumes rising to an altitude of 5.2 km (17,100 ft) a.s.l. Fumarolic activity was occasionally observed. Analyses of satellite imagery revealed a large daily thermal anomaly from the lava dome. The Aviation Color Code level remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Suwanosejima | 10 February-16 February 2010 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Islands (Japan)	Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 11-16 February. Details of possible resulting plumes were not reported. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Tungurahua | 10 February-16 February 2010 | Continuing ActivityCite this Report
Tungurahua Ecuador	The IG reported that during 10-16 February explosions from Tungurahua were detected by the seismic network. The explosions often produced sounds resembling "cannon shots" and caused windows and structures to occasionally vibrate. Blocks ejected from the crater fell onto the flanks and rolled as far as 2 km from the crater. Ash plumes rose to altitudes of 5.5-9 km (18,000-29,500 ft) a.s.l. On 11 February, a small pyroclastic flow seen from Tungurahua Observatory (OVT) in Guadalupe, 11 km N, descended the N and NNW flanks. Ashfall was seen daily and impacted areas to the NW, W, SW, and S. Ashfall was 3 mm thick in Choglontus, Cahuají, and Pillate on 12 February, and 1 mm thick in Choglontus on 14 February. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 19,386 individual reports over 1,186 weeks (average of 16 per week) on 331 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)