All times are local unless otherwise stated.

Bezymianny (Russia) | 4 January-10 January 2017 | New Activity / Unrest Cite this Report
Bezymianny Eastern Kamchatka Volcanic Arc	KVERT reported strong gas-and-steam emissions at Bezymianny during 31 December 2016-6 January 2017 and a daily thermal anomaly over the volcano. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Bogoslof (United States) | 4 January-10 January 2017 | New Activity / Unrest Cite this Report
Bogoslof Aleutian Ridge Volcanic Arc	AVO reported that a five-minute-long seismic signal detected by sensors on islands near Bogoslof began at 2118 on 3 January along with a series of lightning strikes identified by the World Wide Lightning Location Network. An ash cloud identified in satellite data rose as high as 10 km (33,000 ft) a.s.l. and drifted N. AVO raised the Aviation Color Code (ACC) to Red and the Volcano Alert Level (VAL) to Warning. No other indications of activity were noted for the next few days, the ACC and the VAL were lowered to Orange and Watch, respectively, on 5 January. Later that day, at 1324, seismicity again escalated, and lightning strikes indicated another significant and short-lived (five minutes) explosion. The ash plume was visible on satellite images and observed by pilots, and had risen to an estimated altitude of 10.7 km (35,000 ft) a.s.l., detached, and drifted NNW. The ACC was raised to Red and the VAL was raised to Warning, but were again lowered one level the next day. Seismic and infrasound data from neighboring islands indicated another explosive event, beginning at 2230 on 8 January. Seismic data suggested two strong pulses, during 2233-2234 and at 2256, consistent with two distinct volcanic clouds observed in satellite images. The second cloud was larger, rising to an altitude of 10.7 km (35,000 ft) a.s.l. and drifting NW. The ACC was raised to Red and the VAL was raised to Warning, but were again lowered one level to Orange and Watch, respectively, the next day. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Ebeko (Russia) | 4 January-10 January 2017 | New Activity / Unrest Cite this Report
Ebeko Kuril Volcanic Arc	KVERT reported that gas-and-steam plumes sometimes containing minor amounts of ash were emitted from Ebeko during 30 December 2016-6 January 2017. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Klyuchevskoy (Russia) | 4 January-10 January 2017 | New Activity / Unrest Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that during 2-6 January daily satellite images showed a thermal anomaly over Klyuchevskoy. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sabancaya (Peru) | 4 January-10 January 2017 | New Activity / Unrest Cite this Report
Sabancaya Andean Central Volcanic Arc	Based on webcam and satellite views, the Buenos Aires VAAC reported that during 3-10 January intermittent ash puffs from Sabancaya likely rose as high as 9.1 km (30,000 ft) a.s.l. and drifted WSW, W, N, and NE; weather clouds sometimes obscured satellite and webcam views, and the webcam was not operational during 5-6 January. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
San Miguel (El Salvador) | 4 January-10 January 2017 | New Activity / Unrest Cite this Report
San Miguel Central America Volcanic Arc	Based on satellite observations, the Washington VAAC reported that on 7 January steam plumes with minor amounts of ash rose from San Miguel to an altitude of 2.6 km (8,500 ft) a.s.l. and drifted 130 km SW. Only steam-and-gas plumes were detected later that day. Source: Washington Volcanic Ash Advisory Center (VAAC)

Bagana (Papua New Guinea) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Bagana Solomon Volcanic Arc	Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 7-8 January ash plumes from Bagana rose to an altitude of 2.7 km (9,000 ft) a.s.l. and drifted over 45 km NE and E. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Colima (Mexico) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Colima Trans-Mexican Volcanic Belt	Based on webcam and satellite images, the Mexico City MWO, and Colima Towers, the Washington VAAC reported that during 3-10 January ash plumes from Colima rose to altitudes of 4.7-6.7 km (17,000-25,000 ft) a.s.l. and drifted E, SE, S, and SW. The Unidad Estatal de Protección Civil de Colima reported that an explosion detected at 1602 on 7 January was slightly stronger than a moderate level, and that winds were drifting SSE. Source: Washington Volcanic Ash Advisory Center (VAAC)
Dukono (Indonesia) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on analyses of satellite imagery, model data, and notices from PVMBG, the Darwin VAAC reported that during 4-5 and 7-10 January ash plumes from Dukono rose to altitudes of 1.8-2.4 km (6,000-8,000 ft) a.s.l. and drifted as far as 120 km SE, E, and NE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Kilauea (United States) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 4-10 January HVO reported that the lava lake continued to rise and fall, circulate, and spatter in Kilauea’s Overlook vent; the lake level rose as high as 9 m below the Halema’uma’u floor. Webcams recorded incandescence from long-active sources within Pu'u 'O'o Crater and from a vent high on the NE flank of the cone. The 61G lava flow, originating from a vent on Pu'u 'O'o Crater's E flank, continued to enter the ocean at Kamokuna. An active branch of 61G remained active E of Pu'u 'O'o and advanced slowly E at a rate of only a few tens of meters per day. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Langila (Papua New Guinea) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Langila Bismarck Volcanic Arc	Based on analyses of satellite images and wind data, the Darwin VAAC reported that on 2 January a weak ash plume from Langila rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted NE. A thermal anomaly was also detected via satellite. On 5 January an ash plume rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted over 45 km W. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Masaya (Nicaragua) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Masaya Central America Volcanic Arc	Based on analysis of satellite imagery, the Washington VAAC reported that on 5 January a gas, steam, and ash plume from Masaya drifted W. Source: Washington Volcanic Ash Advisory Center (VAAC)
Nevado del Ruiz (Colombia) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Nevado del Ruiz Andean Northern Volcanic Arc	Servicio Geológico Colombiano’s (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that during 3-9 January seismicity at Nevado del Ruiz continued to indicate unrest. Some of the seismic signals were associated with gas-and-ash emissions, as confirmed by webcam images and officials in the Parque Nacional Natural los Nevados. A low-energy thermal anomaly was identified by the MIROVA system on 9 January. On 6 January a gas, water vapor, and ash plume rose 2.5 km above the crater rim and drifted between SW and NE directions. A seismic event at 0745 on 8 January was associated with an ash emission which drifted SW. The Alert Level remained at III (Yellow; the second lowest level on a four-color scale). Source: Servicio Geológico Colombiano (SGC)
Nevados de Chillan (Chile) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Nevados de Chillan Andean Southern Volcanic Arc	Based on a pilot observation, the Buenos Aires VAAC reported that on 6 January a dark-colored fumarolic plume rose from Nevados de Chillán to an altitude of 2.9 km (9,500 ft) a.s.l. and drifted 4.5 km E. The webcam recorded the event as a small, sporadic puff that quickly dissipated; the emission was not identified in satellite images. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
Reventador (Ecuador) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Reventador Andean Northern Volcanic Arc	During 4-10 January IG reported a high level of seismic activity including explosions, long-period earthquakes, harmonic tremor, and signals indicating emissions at Reventador. Although cloud cover often prevented visual observations, ash plumes were noted rising as high as 1 km above the crater and drifting W and NW during 6-7 January. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Semeru (Indonesia) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Semeru Sunda Volcanic Arc	Based on analysis of satellite images and information from PVMBG, the Darwin VAAC reported that on 9 January ash plumes from Semeru rose to an altitude of 4 km (13,000 ft) a.s.l. and drifted N. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Sheveluch (Russia) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 30 December 2016-6 January 2017 lava-dome extrusion onto Sheveluch’s N flank was accompanied by strong fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Satellite images showed a daily thermal anomaly over the dome, and ash plumes that drifted about 100 km N and NE on 30 and 31 December. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sinabung (Indonesia) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Sinabung Sunda Volcanic Arc	Based on PVMBG observations and satellite images, the Darwin VAAC reported that during 2-3 and 8-10 January ash plumes from Sinabung rose 3.6-6.4 km (12,000-21,000 ft) a.s.l. and drifted W, NE, and E. Plumes drifted as far as 55 km E ln 8 January. A thermal anomaly was detected on 9 January. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Suwanosejima (Japan) | 4 January-10 January 2017 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Volcanic Arc	Based on JMA notices and satellite-image analyses, the Tokyo VAAC reported that during 4-5 January ash plumes from Suwanosejima rose to altitudes of 1.2-1.8 km (4,000-6,000 ft) a.s.l. and drifted SE and W. Source: Tokyo 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)