All times are local unless otherwise stated.

Bulusan (Philippines) | 17 February-23 February 2016 | New Activity / Unrest Cite this Report
Bulusan Eastern Philippine Volcanic Arc	PHIVOLCS reported that at 1701 on 22 February explosions at Bulusan generated a steam-and-ash plume that rose 500 m above the WNW fissure vent. The event was accompanied by a high-frequency earthquake followed by low-frequency earthquakes that lasted 4 minutes and 21 seconds. Rumbling sounds were heard in Puting Sapa, Juban, and Bolos, Irosin, and minor amounts of ash fell in barangays Puting Sapa, Sagkayon, and Caladgao in Juban, and barangay Bolos in Irosin. The report noted that no volcanic earthquakes were recorded prior to the eruption, though increased seismicity had been detected during 20-21 February. The Alert Level remained at 1, indicating abnormal conditions and a 4-km radius Permanent Danger Zone (PDZ). Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Telica (Nicaragua) | 17 February-23 February 2016 | New Activity / Unrest Cite this Report
Telica Central America Volcanic Arc	INETER reported that high micro-seismicity at Telica was associated with gas explosions during 16-17 February. On 18 February SINAPRED stated that a small amount of lava was visible in a vent. Sources: Instituto Nicaragüense de Estudios Territoriales (INETER), Sistema Nacional para la Prevención, Mitigación y Atención de Desastres (SINAPRED)
Zhupanovsky (Russia) | 17 February-23 February 2016 | New Activity / Unrest Cite this Report
Zhupanovsky Eastern Kamchatka Volcanic Arc	KVERT reported that moderate activity at Zhupanovsky continued during 12-19 February. On 12 February explosions generated ash plumes that rose to an altitude of 10 km (32,800 ft) a.s.l. During 12-13 February satellite images detected a thermal anomaly and ash plumes that drifted 600 km E and NE. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Aira (Japan) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	During 15-22 February JMA reported that six explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 1,300 m. A small-scale eruption occurred from Minamidake summit crater on 20 February. The Alert Level remained at 3 (on a 5-level scale). Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Chirpoi (Russia) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Chirpoi Kuril Volcanic Arc	SVERT reported that satellite images detected a thermal anomaly over Snow, a volcano of Chirpoi, during 16-19 February. The Aviation Color Code remained at Yellow. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Colima (Mexico) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Colima Trans-Mexican Volcanic Belt	Based on satellite and webcam images, and wind data, the Washington VAAC reported that during 18-19 February gas-and-ash plumes from Colima rose to altitudes of 4.6-5.5 km (15,000-18,000 ft) a.s.l. and drifted N, S, and SSW. Source: Washington Volcanic Ash Advisory Center (VAAC)
Copahue (Chile-Argentina) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Copahue Southern Andean Volcanic Arc	Based on satellite and webcam views, the Buenos Aires VAAC reported that on 17 and 20 February steam plumes containing minor amounts of ash rose from Copahue and drifted SE at an altitude of 3.3 km (11,000 ft) a.s.l. Only gas emissions were visible on 19 February. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
Dukono (Indonesia) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 17-23 February ash plumes from Dukono rose to altitude of 2.7-3 km (8,000-10,000 ft) a.s.l. and drifted 55-225 km in multiple directions. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Etna (Italy) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Etna Sicily Volcanic Province	INGV reported that during January eruptive activity at Etna was at low levels. During the last week of January and on 6 February ash emissions rose from a vent located high on the E flank of the New Southeast Crater (NSEC) cone. At 0422 on 23 February an explosion at Northeast Crater (NEC) ejected incandescent tephra several tens of meters above the crater rim, and produced a dark ash plume that drifted NE. A camera recorded lightning flashes in the plume. Weak ash emission rose from the crater during the rest of the morning. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Karangetang (Indonesia) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Karangetang Sangihe Volcanic Arc	Based on observations conducted at the Karangetang Volcano Observation Post in the village of Salili, PVMBG reported that during 10-17 February the lava dome was incandescent at night. Variable amounts of white and blue emissions rose as high as 100 m above Main Crater. RSAM values doubled in January and continued to rise in February due to an increased number of shallow volcanic earthquakes. The Alert Level remained at 3 (on a scale of 1-4); visitors and residents were warned not to approach Karangetang within a 4-km radius. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Karymsky (Russia) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that moderate explosive activity at Karymsky continued during 12-19 February. Satellite images detected a daily thermal anomaly, and ash plumes from explosions that drifted about 125 km E. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea (United States) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	HVO reported that seismicity beneath Kilauea's summit, upper East Rift Zone, and Southwest Rift Zone was at background levels during 17-23 February. The lava lake continued to circulate and spatter in the Overlook vent. A moderate-size collapse of part of the crater wall into the summit lava lake on 21 February ejected some ash onto the caldera rim. Webcams recorded multiple incandescent outgassing vents within Pu'u 'O'o Crater and high on the northeast rim. 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)
Masaya (Nicaragua) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Masaya Central America Volcanic Arc	On 17 February INETER reported that the lava lake on the floor of Masaya's Santiago crater remained visible. RSAM values were at high levels and gas emissions were low. Source: Instituto Nicaragüense de Estudios Territoriales (INETER)
Momotombo (Nicaragua) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Momotombo Central America Volcanic Arc	INETER reported that during 16-17 February two explosions at Momotombo were accompanied by tremor, and produced ash emissions and ejected incandescent material onto the flanks. The first and largest explosion (recorded at 0344) ejected incandescent tephra 800 m above the crater. RSAM values were at low-to-moderate levels. Based on webcam views and satellite images, the Washington VAAC reported that on 19 February ash emissions rose to an altitude of 3.6 km (12,000 ft) a.s.l. and drifted SW and WSW. The next day ash emissions drifted SW. On 21 February ash plumes drifted about 80 km W and 25 km E. Source: Instituto Nicaragüense de Estudios Territoriales (INETER)
Reventador (Ecuador) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Reventador Northern Andean Volcanic Arc	During 17-23 February IG reported a high level of seismic activity including explosions, volcano-tectonic events, long-period earthquakes, harmonic and spasmodic tremor, and signals indicating emissions at Reventador; cloud cover often prevented visual observations. On 18 February a gas-and-ash plume rose 500 m above the crater and drifted NW. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Sheveluch (Russia) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 12-19 February lava-dome extrusion onto Sheveluch’s N flank was accompanied by fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Explosions on 18 February generated ash plumes that 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 (Indonesia) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Sinabung Sunda Volcanic Arc	Based on satellite images, ground reports, and information from PVMBG, the Darwin VAAC reported that during 18 and 20-23 February ash plumes from Sinabung rose to altitudes of 3-5.5 km (10,000-18,000 ft) a.s.l. and drifted as far as 55 km S, SW, W, and NW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Tengger Caldera (Indonesia) | 17 February-23 February 2016 | Continuing ActivityCite this Report
Tengger Caldera Sunda Volcanic Arc	Based on satellite images, wind data, ground reports, and information from PVMBG, the Darwin VAAC reported that during 17-23 February ash plumes from Tengger Caldera's Bromo cone rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted at most 55 km NW, ESE, and SE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,652 individual reports over 1,244 weeks (average of 17 per week) on 338 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)