All times are local unless otherwise stated.

Masaya | 6 January-12 January 2016 | New Activity / Unrest Cite this Report
Masaya Nicaragua	INETER reported that during 6-8 January the lava lake at Masaya was observed in satellite images and sloshing sounds were noted. Gas emissions rose as high as 400 m above the crater and drifted W and SW. On 8 January very small explosions ejected tephra onto the crater. Source: Instituto Nicaragüense de Estudios Territoriales (INETER)
Soputan | 6 January-12 January 2016 | New Activity / Unrest Cite this Report
Soputan Sulawesi	On 6 January BNPB reported that several explosions had been detected since the Alert Level for Soputan was raised to 3 (on a scale of 1-4) on 4 January. Strombolian activity that began at 0350 on 5 January ejected incandescent material as high as 250 m above the crater. A booming sound at 0638 was followed by a pyroclastic flow that traveled 2.5 km down the ENE flank. Ash plumes rose 6.5 km above the crater and drifted W. Several villages in the districts of West Langowan (8 km E), Tompaso (11 km NE), and East Ratahan (14 km SE) reported ashfall. Residents and tourists were advised not to approach the craters within a radius of 4 km, or 6.5 km on the WSW flank. Source: Badan Nacional Penanggulangan Bencana (BNPB)

Chirpoi | 6 January-12 January 2016 | Continuing ActivityCite this Report
Chirpoi Kuril Islands (Russia)	SVERT reported that satellite images detected a thermal anomaly over Snow, a volcano of Chirpoi, on 9 January. The Aviation Color Code remained at Yellow. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Colima | 6 January-12 January 2016 | Continuing ActivityCite this Report
Colima Mexico	Based on satellite images, wind data, webcam images, and notices from the Mexico City MWO, the Washington VAAC reported that during 6-12 January ash plumes from Colima rose to altitudes of 4.6-6.7 km (15,000-22,000 ft) a.s.l. and drifted NE, ENE, and E. Source: Washington Volcanic Ash Advisory Center (VAAC)
Copahue | 6 January-12 January 2016 | Continuing ActivityCite this Report
Copahue Central Chile-Argentina	Based on satellite and webcam views, the Buenos Aires VAAC reported that on 6 January a gas and steam plume from Copahue with minor amounts of ash rose to an altitude of 4.6 km (15,000 ft) a.s.l. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
Dukono | 6 January-12 January 2016 | Continuing ActivityCite this Report
Dukono Halmahera	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 6-12 January ash plumes from Dukono rose to altitudes of -3 km (7,000-10,000 ft) a.s.l. and drifted 55-175 km in multiple directions. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Fuego | 6 January-12 January 2016 | Continuing ActivityCite this Report
Fuego South-Central Guatemala	INSIVUMEH reported that white fumarolic plumes rose as high as 350 m above Fuego during 7-12 January. Three weak explosions detected during 9-10 January generated low ash plumes that drifted SE. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Karangetang | 6 January-12 January 2016 | Continuing ActivityCite this Report
Karangetang Sangihe Islands	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 12 January an ash plume from Karangetang rose to an altitude of 5.2 km (17,000 ft) a.s.l. and drifted 65 km NW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karymsky | 6 January-12 January 2016 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka (Russia)	KVERT reported that moderate explosive activity at Karymsky continued during 1-8 January. Satellite images detected a thermal anomaly during 1, 3-4, and 6-7 December, and ash plumes drifting as far as 200 km E during 3 and 5-6 January. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea | 6 January-12 January 2016 | Continuing ActivityCite this Report
Kilauea Hawaiian Islands (USA)	HVO reported that seismicity beneath Kilauea's summit, upper East Rift Zone, and Southwest Rift Zone was at background levels during 6-12 January. The lava lake continued to circulate and spatter in the Overlook vent. At 0351 on 8 January a rockfall triggered a small explosion that ejected lava fragments onto the crater rim. Webcams recorded multiple incandescent outgassing vents within Pu'u 'O'o Crater and high on the northeast rim. A short lava flow erupted onto the crater floor on 6 January. The June 27th NE-trending lava flow continued to be active within 6 km NE of Pu'u 'O'o Crater, burning some areas of forest. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Lokon-Empung | 6 January-12 January 2016 | Continuing ActivityCite this Report
Lokon-Empung Sulawesi	Although inclement weather sometimes obscured views of Lokon-Empung's Tompaluan Crater, PVMBG reported that during 30 December-7 January observers at the post in Kakaskasen Tomohon (North Sulawesi, 4 km from the crater), saw white plumes rising as high as 250 m above the crater. Seismicity fluctuated, and was dominated by shallow volcanic earthquakes and signals indicating emissions; the number of shallow volcanic earthquakes significantly increased on 3 January. The Alert Level remained at 3 (on a scale of 1-4). Residents and tourists were reminded not to approach the crater within a radius of 2.5 km. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Semeru | 6 January-12 January 2016 | Continuing ActivityCite this Report
Semeru Eastern Java	PVMBG reported that during 1 November 2015-4 January 2016 white and gray plumes from Semeru rose as high as 500 m above the crater and drifted E, S, and W; inclement weather sometimes prevented observations. In November nine incandescent avalanches traveled 100-500 m down the flanks. During December 2015-4 January 2016 incandescent material was occasionally ejected above the crater. Seismicity was dominated by signals indicating avalanches and emissions. The Alert Level remained at 2 (on a scale from 1-4); visitors and residents were warned to avoid the SE flank within 4 km of the crater. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Sheveluch | 6 January-12 January 2016 | Continuing ActivityCite this Report
Sheveluch Central Kamchatka (Russia)	KVERT reported that during 1-8 January lava-dome extrusion onto Sheveluch’s N flank was accompanied by fumarolic activity, dome incandescence, ash explosions, and hot avalanches. A collapse from the W flank of the lava dome on 3 January produced a hot avalanche, and an ash plume that rose 5.5 km (18,000 ft) a.s.l. and drifted NE. Satellite images detected a daily and intense thermal anomaly over the dome. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sinabung | 6 January-12 January 2016 | Continuing ActivityCite this Report
Sinabung Northwestern Sumatra	Based on information from PVMBG, ground reports, and satellite images, the Darwin VAAC reported that during 6-12 January ash plumes from Sinabung rose to altitudes of 3.7-4.3 km (12,000-14,000 ft) a.s.l. and drifted 15-40 km SW, W, NW, and NE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Suwanosejima | 6 January-12 January 2016 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Islands (Japan)	Based on JMA notices and satellite-image analyses, the Tokyo VAAC reported an explosion at Suwanosejima on 6 January. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Tengger Caldera | 6 January-12 January 2016 | Continuing ActivityCite this Report
Tengger Caldera Eastern Java	Based on satellite and webcam images, the Darwin VAAC reported that during 6-12 January ash plumes from Tengger Caldera's Bromo cone rose to an altitude of 3.6 km (12,000 ft) a.s.l. and drifted 30-165 km in multiple directions. Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 19,363 individual reports over 1,185 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)