All times are local unless otherwise stated.

Ambae (Vanuatu) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Ambae Vanuatu Volcanic Arc	According to a news report on 4 January, all of the 3,000 people displaced by the eruption of Aoba returned home. The eruption began on 27 November 2005. Source: Radio New Zealand
Augustine (United States) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Augustine Alaska Peninsula Volcanic Arc	During 30 December to 6 January, seismicity at Augustine increased slightly in comparison to the previous week. In addition, vigorous steaming was visible from several summit fumaroles during clear weather late in the week. Varied fumarole temperatures were recorded during a thermal survey on 4 January, but there was no significant change in the distribution of thermal features since 22 December. A significant increase in the sulfur-dioxide flux was measured on 4 January, in comparison to values on 20 December. Augustine remained at Concern Color CodeYellow. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Barren Island (India) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Barren Island Andaman Volcanic Back-Arc	Satellite imagery showed a thin ash plume emitted from Barren Island extending WNW during 5-7 January. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Colima (Mexico) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Colima Trans-Mexican Volcanic Belt	During 4-9 January, several small explosions at Colima produced ash plumes. The highest rising ash plume was produced by an explosion on 9 January and reached ~6.7 km (22,000 ft) a.s.l. The plume drifted NE and SW. Sources: Centro Universitario de Estudios Vulcanológicos (CUEV) - Universidad de Colima, Washington Volcanic Ash Advisory Center (VAAC)
Fuego (Guatemala) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Fuego Central America Volcanic Arc	During 4-9 January, moderate-to-strong explosions at Fuego produced ash plumes that rose to ~1 km above the volcano (or 15,600 ft a.s.l.). The explosions were accompanied by rumbling sounds and acoustic waves that shook windows and doors in villages near the volcano. Avalanches of volcanic material traveled down the volcano's SW flank. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Galeras (Colombia) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Galeras Andean Northern Volcanic Arc	During 2-9 January, Galeras emitted gas and small amounts of ash. In addition, heightened seismicity continued and small changes in deformation were measured. The sulfur-dioxide flux from the volcano varied between 490 and 1,500 metric tons per day. Galeras remained at Alert Level 3 ("changes in the behavior of volcanic activity have been noted"). Source: Servicio Geológico Colombiano (SGC)
Kilauea (United States) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 4-9 January, lava from Kilauea continued to enter the sea at the East Lae`apuki area, building a new lava delta. Surface lava flows were visible on the Pulama pali fault scarp. Background volcanic tremor was near normal levels at Kilauea's summit. Volcanic tremor reached moderate levels at Pu`u `O`o. Small amounts of deformation occurred at the volcano. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Popocatepetl (Mexico) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Popocatepetl Trans-Mexican Volcanic Belt	A small explosion occurred at Popocatépetl on 6 January around 0042. According to the Washington VAAC, the resultant ash plume was visible on satellite imagery at a height of ~5.8 km (19,000 ft a.s.l.), extending NE. CENAPRED reported that after the explosion overall activity decreased to previous levels. Sources: Washington Volcanic Ash Advisory Center (VAAC), Centro Nacional de Prevencion de Desastres (CENAPRED)
Santa Ana (El Salvador) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Santa Ana Central America Volcanic Arc	During 30 December to 6 January, volcanic activity was moderate at Santa Ana. Seismicity was a bit over normal levels with small earthquakes occurring, which were interpreted as being associated with gas pulses. Continuous low-level emissions of steam and gas originated from the lagoon and from fumaroles within the crater. Gas rose 200-500 m above the crater (or 8,400-9,400 ft a.s.l.) and drifted SW. The sulfur-dioxide flux ranged between 180 and 1,476 metric tons per day. The Alert Level remained at Red, the highest level, within a 5-km radius around the volcano's summit crater. Source: Servicio Nacional de Estudios Territoriales (SNET)
Santa Maria (Guatemala) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Santa Maria Central America Volcanic Arc	During 4-9 January, several explosions occurred at Santa María's Santiaguito lava-dome complex, producing ash plumes that rose to ~800 m above the volcano (or 15,000 ft a.s.l.) and drifted SW. Lava avalanches originated from the SW edge of the Caliente dome. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Soufriere Hills (United Kingdom) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Soufriere Hills Lesser Antilles Volcanic Arc	Activity at Soufrière Hills remained at elevated levels during 30 December to 6 January. Photographs revealed that the lava dome continued to grow throughout the report period over a broad sector extending from the SW around to the NE. Numerous small rockfalls continued from the S, E, and NE flanks of the lava dome, adding talus in the upper reaches of the Tar River valley to the NE. The sulfur-dioxide flux averaged 522 metric tons per day. Source: Montserrat Volcano Observatory (MVO)
Spurr (United States) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Spurr Alaska Peninsula Volcanic Arc	Seismicity remained above background levels at Spurr during 30 December to 6 January. Clear satellite and web camera views of the volcano showed no unusual activity. Spurr remained at Concern Color Code Yellow. Source: US Geological Survey Alaska Volcano Observatory (AVO)
St. Helens (United States) | 4 January-10 January 2006 | Continuing ActivityCite this Report
St. Helens High Cascades Volcanic Arc	Growth of the new lava dome inside the crater of Mount St. Helens continued during 4-9 January, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. There were no significant changes in seismicity or deformation during the report period. Small earthquakes continued to be recorded every 2-3 minutes, with slightly larger events occurring intermittently. Two short lulls in the pattern of earthquake activity occurred after larger than normal earthquakes. St Helens remained at Volcano Advisory (Alert Level 2); aviation color code Orange. Source: US Geological Survey Cascades Volcano Observatory (CVO)
Suwanosejima (Japan) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Volcanic Arc	Based on information from JMA, the Tokyo VAAC reported that explosions occurred at Suwanose-jima on 1 and 10 January. An explosion on 10 January produced an ash plume to a height of ~1.8 km (6,000 ft) a.s.l. The heights of ash clouds from other explosions were not reported. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Tungurahua (Ecuador) | 4 January-10 January 2006 | Continuing ActivityCite this Report
Tungurahua Andean Northern Volcanic Arc	IG reported that during 4-7 January, there was a slight change in the activity at Tungurahua in comparison to previous weeks, with more small-to-moderate explosions occurring. The explosions produced plumes of gas and small amounts of ash that rose to ~1 km above the volcano (or 19,750 ft a.s.l.). Seismicity remained at low levels. Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

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.

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)