All times are local unless otherwise stated.

Fourpeaked (United States) | 11 October-17 October 2006 | New Activity / Unrest Cite this Report
Fourpeaked Alaska Peninsula Volcanic Arc	The AVO reported that earthquake activity and gas emissions continued at Fourpeaked during 7-13 October. Observations through most of the week were hindered due to cloud cover, but on 12 October AVO staff reported that two prominent vents were emitting steam and gas. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Rabaul (Papua New Guinea) | 11 October-17 October 2006 | New Activity / Unrest Cite this Report
Rabaul Bismarck Volcanic Arc	Based on information from the RVO, the Darwin VAAC reported that a brief eruption of Rabaul on 11 October produced a plume that reached an altitude of 7.6 km (25,000 ft) a.s.l. and dissipated NW. Continuous low-level emissions and Vulcanian eruptions produced plumes to 1 km (3,300 ft) a.s.l. during 12-17 October. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
San Miguel (El Salvador) | 11 October-17 October 2006 | New Activity / Unrest Cite this Report
San Miguel Central America Volcanic Arc	Servicio Nacional de Estudios Territoriales (SNET) reported on 10 October that an Alert Level for San Miguel was established as Green within 4 km from the center of the crater due to a slight increase in seismic activity. On 15 October, the Alert Level was increased to Yellow due to further increases in seismic activity, but then decreased to Green again the next day. Source: Servicio Nacional de Estudios Territoriales (SNET)

Bulusan (Philippines) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Bulusan Eastern Philippine Volcanic Arc	PHIVOLCS reported that an explosion from Bulusan on 10 October produced an ash-and-steam plume that rose to 4.5 km (15,000 ft) a.s.l. and drifted mainly SE and SSW. Light ashfall (1.5-5.0 mm thick) was reported in neighboring towns downwind. Based on seismic data, the activity lasted for 9 minutes. On 11 and 12 October, steam plumes drifted SW and SSW. Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Karymsky (Russia) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	Activity at Karymsky continued during 11-17 October, with 100-190 shallow earthquakes occurring daily. Based on interpretations of seismic data and satellite observations, ash plumes may have reached altitudes of 2.5 km (8,200 ft) a.s.l. A thermal anomaly in the crater was detected on 7 and 12 October. According to the Tokyo VAAC, an ash plume rose to 3.7 km (12,000 ft) a.s.l. on 17 October. Karymsky remained at Concern Color Code Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea (United States) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	The summit of Kilauea continued to slowly inflate S of Halema'uma'u caldera during 11-17 October. Incandescence from surface flows was intermittently visible on the pali and at the base of the pali on 14 October. Lava from the Campout and PKK systems continued to flow off of a lava delta into the ocean at the East Lae'apuki and East Ka'ili'ili entries. Two large earthquakes (largest, M 6.7) occurred on 15 October on the northwest side of Hawai'i Island. On 16 October, HVO reported that the earthquakes did not affect the Kilauea eruption. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Langila (Papua New Guinea) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Langila Bismarck Volcanic Arc	According to the Darwin VAAC, the RVO reported that Langila erupted at 1130 on 17 October. Satellite imagery from 1133 showed no activity over Langila, but a "low level plume" was visible farther W over Ritter Island. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Mayon (Philippines) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Mayon Eastern Philippine Volcanic Arc	PHIVOLCS reported that on 11 and 12 October steaming from Mayon was moderate and one volcanic earthquake was recorded. Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Piton de la Fournaise (France) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Piton de la Fournaise Reunion Hotspot Volcano Group	The eruption of Piton de la Fournaise that began on 30 August continued within the Dolomieu Crater. A new cone about 20-25 m high was formed in the SE part of Dolomieu and lava flows up to 10 m thick filled up 75% of the crater floor. The E part of the crater was filled up to the rim where lava flowed over and down the flank for hundreds of meters. On 9 October, a new crater formed about 100 m SW of the first one. Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)
Sangay (Ecuador) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Sangay Andean Northern Volcanic Arc	Based on information from Guayaquil MWO and a pilot report, the Washington VAAC reported on 11 October that emission plumes from Sangay reached altitudes of 2.7 km (9,000 ft) a.s.l. and drifted W. Source: Washington Volcanic Ash Advisory Center (VAAC)
Soufriere Hills (United Kingdom) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Soufriere Hills Lesser Antilles Volcanic Arc	During 6-13 October, lava-dome growth at Soufrière Hills continued and was concentrated on the NE part of the edifice. The vents just inside Gage's wall and on the summit of the dome periodically produced both ash and gas. Heavy rainfall on 9 and 11-12 October resulted in mudflow activity in all drainage systems. Ash fell in the N part of the island. Based on information from the MVO, pilot reports, and the Piarco MWO, the Washington VAAC reported that continuous ash and gas emissions during 10-17 October produced plumes that drifted NW, N, and NE. Plumes reached altitudes of 2.1-4.6 km (7,000-15,000 ft) a.s.l. A minor pyroclastic flow on 16 October produced an ash plume that drifted NNE. A hotspot was detected on satellite imagery from 12 to 17 October. Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
St. Helens (United States) | 11 October-17 October 2006 | Continuing ActivityCite this Report
St. Helens High Cascades Volcanic Arc	Data from deformation-monitoring instruments showed that during 11-17 October the lava dome at Mount St. Helens continued to grow and produce small rockfalls. Source: US Geological Survey Cascades Volcano Observatory (CVO)
Suwanosejima (Japan) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Volcanic Arc	Based on information from JMA and a pilot report, the Tokyo VAAC reported that on 14, 16, and 17 October, ash plumes from Suwanose-jima reached altitudes of 3 km (10,000 ft) a.s.l. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Tungurahua (Ecuador) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Tungurahua Andean Northern Volcanic Arc	IG reported an increase in emissions and seismicity at Tungurahua on 11 and 12 October. Steam plumes with slight to moderate amounts of ash reached heights of 9-12 km (29,500-39,500 ft) a.s.l. and resulted in light ashfall in areas NW and W. During 13-17 October, seismicity decreased and emissions produced plumes that reached heights of 7-8 km (23,000-26,000 ft) a.s.l. On 16 October, a small lava flow produced incandescent blocks and gas plumes. Lahars traveled NNW and NNE down the gorges of Vazcún and Ulba, respectively. Incandescence from the crater could be seen during most of the reporting period. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Ubinas (Peru) | 11 October-17 October 2006 | Continuing ActivityCite this Report
Ubinas Andean Central Volcanic Arc	Based on pilot reports and satellite imagery, the Buenos Aires VAAC reported continuous emission of ash plumes from Ubinas during 12-17 October. The plumes rose to 4.9-6.7 km (16,000-22,000 ft) a.s.l. and drifted S, SE, E, and N. 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.

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)