All times are local unless otherwise stated.

Klyuchevskoy (Russia) | 14 February-20 February 2007 | New Activity / Unrest Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	Increased summit activity at Kliuchevskoi on 15 February led KVERT to raise the Concern Color Code from Yellow to Orange. Ash explosions and incandescence at the summit were observed. Strombolian explosions expelled bombs about 300 m above the crater. Based on video data and observations, gas-and-steam plumes with small amounts of ash rose to altitudes of 5.3 km (17,400 ft) a.s.l. and drifted SW. A thermal anomaly at the summit was seen on satellite imagery. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Nevado del Huila (Colombia) | 14 February-20 February 2007 | New Activity / Unrest Cite this Report
Nevado del Huila Andean Northern Volcanic Arc	INGEOMINAS reported increased seismic activity and two explosions from Nevado del Huila on 19 February. An ash plume rose to an altitude of approximately 6 km (19,700 ft) a.s.l. During aerial observations on 20 February, ash deposits were seen on the W sector of a summit glacier and dispersed to the NW. Fumarolic plumes originating from several points along a fissure rose to 7 km (23,000 ft) a.s.l. Small mudflows from a glacier traveled down a gorge. Based on news reports, small avalanches prompted officials to order evacuations from towns bordering rivers. Sources: Servicio Geológico Colombiano (SGC), Reuters
Piton de la Fournaise (France) | 14 February-20 February 2007 | New Activity / Unrest Cite this Report
Piton de la Fournaise Reunion Hotspot Volcano Group	OVPDLF reported that on 18 February a small "seismic crisis" at Piton de la Fournaise began at 1611 and lasted only a few minutes. About 20 minutes later, based on seismic interpretation, an eruption at the summit began and ended the next day at 0155. A crack across Dolomieu crater was seen during an aerial observation on 18 February. Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)
Telica (Nicaragua) | 14 February-20 February 2007 | New Activity / Unrest Cite this Report
Telica Central America Volcanic Arc	The Washington VAAC reported that continuous emissions of ash from Telica were visible on a web-camera on 15 February. A resultant plume rose to an altitude of 1.5 km (5,000 ft) a.s.l. Based on satellite imagery, the plume drifted SW and a hotspot was present at the summit. Source: Washington Volcanic Ash Advisory Center (VAAC)
Whakaari/White Island (New Zealand) | 14 February-20 February 2007 | New Activity / Unrest Cite this Report
Whakaari/White Island Taupo Volcanic Zone	Recent visits to White Island's Crater Lake, including one on 13 February, have confirmed a continual rise in lake temperature since August 2006 from a normal range of 48-50°C. In January 2007, the temperature reached over 60°C. The last temperature measurement was 74°C, the highest ever recorded in the lake. The increased heat flow caused accelerated evaporation, and the lake level has dropped over 6 m. Steam plumes have been observed over the island. A deformation survey of the crater floor showed no significant changes from recent months. Source: GeoNet

Aira (Japan) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	Based on satellite imagery and pilot reports, the Tokyo VAAC reported that an ash plume from Sakura-jima reached an altitude of 1.5 km (5,000 ft) a.s.l. on 15 February. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Karangetang (Indonesia) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Karangetang Sangihe Volcanic Arc	On 14 February, the Alert Level at Karangetang was lowered to 2 (scale of 1-4). Seismicity had decreased in intensity and frequency since 18 November 2006. Lava flows and incandescent avalanches were not observed after 25 January 2007. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Karymsky (Russia) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	Seismic activity at Karymsky was above background levels during 9-16 February, with 50-200 shallow earthquakes occurring daily. Minor explosions may have occurred and a thermal anomaly in the crater was detected on satellite imagery. The Level of Concern Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea (United States) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 14-20 February, lava from Kilauea continued to flow from lava deltas into the ocean at the East Lae'apuki, Kamokuna, and East Ka'ili'ili entries. Incandescence was intermittently visible from several breakouts on the pali and from several vents in Pu'u 'O'o's crater. On 15 February, breakout surface lava from the Campout flow produced seven lava falls over the seacliff behind the East Lae'apuki bench. Lava continued to flow over the seacliff in this area for the rest of the reporting period. Tremor at Kilauea's summit continued at low levels. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Manam (Papua New Guinea) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Manam Bismarck Volcanic Arc	Based on satellite imagery and information from Rabaul Volcano Observatory, the Darwin VAAC reported that diffuse plumes from Manam drifted WSW on 15 February. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Popocatepetl (Mexico) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Popocatepetl Trans-Mexican Volcanic Belt	According to the Washington VAAC, a puff with little ash content emitted from Popocatépetl was reported from the MWO and visible from the camera operated by CENEPRED on 14 February. A very diffuse plume was seen drifting to the E on satellite imagery. Base on an aerial photograph taken on 24 January, CENEPRED reported that the lava-dome dimensions have slightly increased since 24 November 2006. Sources: Washington Volcanic Ash Advisory Center (VAAC), Centro Nacional de Prevencion de Desastres (CENAPRED)
Rabaul (Papua New Guinea) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Rabaul Bismarck Volcanic Arc	Based on satellite imagery and RVO, the Darwin VAAC reported that diffuse plumes from Rabaul rose to altitudes of 2.1 km (7,000 ft) a.s.l. and drifted ESE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Santa Maria (Guatemala) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Santa Maria Central America Volcanic Arc	Based on satellite imagery, the Washington VAAC reported that diffuse plumes from Santa María's Santiaguito lava dome complex drifted NE on 15 February. INSIVUMEH reported that avalanches descended the SW flank to the base of Caliente Dome and explosions produced diffuse ash plumes that drifted SW on 15 February. Explosions on 19 February produced ash plumes and ashfall to areas SW. According to the Washington VAAC diffuse plumes were visible on satellite imagery. Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sheveluch (Russia) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	Activity at Shiveluch continued above background levels during 9-16 February, with over 180 volcanic earthquakes and tremor occurring daily. Based on seismic interpretation, observation, and video data, gas-and-ash plumes rose to altitudes of 5.5-6 km (18,000-19,700 ft) a.s.l. throughout the reporting period. Plumes drifted W and SW. A large thermal anomaly was visible on satellite imagery. The Tokyo VAAC reported eruption plumes to altitudes of 5.2-6.1 km (17,000-20,000 ft) a.s.l. on 15 and 19 February based on information from KEMSD, KVERT, and satellite imagery. Plumes drifted NW on 19 February. The Level of Concern Color Code remained at Orange. Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufriere Hills (United Kingdom) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Soufriere Hills Lesser Antilles Volcanic Arc	During 9-16 February, seismic activity at Soufrière Hills was slightly elevated as compared to previous weeks. The lava-dome volume was estimated at 200 million cubic meters based on recent measurements from LIDAR data. Previous measurements over-estimated the lava-dome volume due to the perceived location of the dome and the lack of data from inside the crater. The height of the dome was about 1060 m a.s.l. During 17-18 February, rockfalls and small pyroclastic flows traveled W down Gages Valley and E down Tar River Valley. Incandescence was seen from the E and N sides of the dome. Rockfalls continued on 19 and 20 February. Based on satellite data and information from the MVO, the Washington VAAC reported continuous emissions during 14-20 February. Resultant plumes rose to altitudes of km (5,000-8,000 ft) a.s.l. and drifted mainly NW, W, and S. A thermal anomaly in the crater was detected on satellite imagery. Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
St. Helens (United States) | 14 February-20 February 2007 | Continuing ActivityCite this Report
St. Helens High Cascades Volcanic Arc	Data from deformation-monitoring instruments showed that during 14-20 February the lava dome at Mount St. Helens continued to grow. Seismicity continued at low levels, punctuated by M 1.5-2.5 and occasionally larger earthquakes. Inclement weather inhibited observations. Source: US Geological Survey Cascades Volcano Observatory (CVO)
Suwanosejima (Japan) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Volcanic Arc	Based on information from JMA and satellite imagery, the Tokyo VAAC reported that an explosion from Suwanose-jima produced eruption plumes during 19-20 February. The altitude and direction of the plumes were not reported. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Ubinas (Peru) | 14 February-20 February 2007 | Continuing ActivityCite this Report
Ubinas Andean Central Volcanic Arc	Based on pilot reports, the Buenos Aires VAAC reported continuous emissions from Ubinas during 18-20 February. Ash plumes rose to 5.5-7 km (18,000-23,000 ft) a.s.l. and drifted E and SW. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,322 individual reports over 1,229 weeks (average of 17 per week) on 336 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.

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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)