All times are local unless otherwise stated.

Alaid | 24 February-1 March 2016 | New Activity / Unrest Cite this Report
Alaid Kuril Islands (Russia)	KVERT reported that an intense thermal anomaly was detected in satellite images over Alaid during 0800-1256 on 21 February. Diffuse ash emissions drifted 50 km E. The Aviation Color Code was raised to Yellow (the second lowest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Telica | 24 February-1 March 2016 | New Activity / Unrest Cite this Report
Telica Sierra de los Marrabios	INETER reported high micro-seismicity at Telica during 20 February-1 March. Incandescence from the vent on the crater floor increased; lava in the vent was first observed on 25 February and persisted through 1 March. Five gas-and-ash explosions were recorded during 29 February-1 March, generating plumes that rose 300 above the crater and drifted W and SW. The strongest event started at 0819 and produced gas-and-ash emissions for 14 minutes. Source: Instituto Nicaragüense de Estudios Territoriales (INETER)
Tungurahua | 24 February-1 March 2016 | New Activity / Unrest Cite this Report
Tungurahua Ecuador	IG reported that a swarm of volcano-tectonic and long-period earthquakes began at Tungurahua at 1105 on 26 February. At 1211 an explosion produced a plume with high ash content that rose 5 km above the crater and drifted W. Ash fell in Juive (NW), Chico, Choglontús (13 km WSW), El Manzano (8 km SW), and Cahuají (8 km SW). Explosions at 1239, 1247, and 1252 generated ash plumes that rose 6-7 km above the crater. An explosion at 1333 generated a small pyroclastic flow that descended halfway down the W and NW flanks, and an ash plume that rose 8 km. At 1535 another pyroclastic flow, generated from material spilling over the WNW rim, also traveled halfway down the volcano in the Mandur (NW), Hacienda (NW), and Cusua (NW) drainages. Ashfall was noted in El Manzano, Choglontús, Pillate (8 km W), Juive, Ambato (31 km NW), and Quero (20 km NW); reddish, black, gray, and beige tephra up to 3 mm in diameter fell in Pillate and Choglontús. In the evening Strombolian activity ejected incandescent blocks which rolled 1.5 km down the flanks. For a short time around 2200 lava fountains rose 500 m. Explosions and nighttime crater incandescence continued to be detected during 27 February-1 March, and explosions sometimes vibrated nearby structures. Ashfall was observed daily in areas including El Manzano, Palitahua (6 km SSW), Cotaló (8 km NW), Cahuají, Providencia, Puela (8 km SW), Chazo, Pillate, Choglontús, Mocha (25 km WNW), and areas of Quero. Ash plumes were observed rising 2-4 km above the crater on 27 February and 1 March. During 29 February-1 March pyroclastic flows descended the Juive, Mandur (NW), Achupashal (NW), and Romero drainages; the largest traveled 1.5 km down the Achupashal. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

Colima | 24 February-1 March 2016 | Continuing ActivityCite this Report
Colima Mexico	Based on satellite and webcam images, and notices from the Mexico City MWO, the Washington VAAC reported that during 24-25 and 27 February ash plumes from Colima rose to altitude of 5.2-5.8 km (17,000-19,000 ft) a.s.l. and drifted as far as 150 km NE and N. Source: Washington Volcanic Ash Advisory Center (VAAC)
Copahue | 24 February-1 March 2016 | Continuing ActivityCite this Report
Copahue Central Chile-Argentina	Based on satellite and webcam views, the Buenos Aires VAAC reported that during 24-25 and 28 February steam plumes containing minor amounts of ash rose from Copahue and drifted E at altitudes of 3.3-4.3 km (11,000-14,000 ft) a.s.l. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
Dukono | 24 February-1 March 2016 | Continuing ActivityCite this Report
Dukono Halmahera	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 24 February-1 March ash plumes from Dukono rose to altitudes of 2.4-3 km (8,000-10,000 ft) a.s.l. and drifted 15-120 km in multiple directions. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karangetang | 24 February-1 March 2016 | Continuing ActivityCite this Report
Karangetang Sangihe Islands	Based on observations conducted at the Karangetang Volcano Observation Post in the village of Salili, PVMBG reported that during 17-24 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 | 24 February-1 March 2016 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka (Russia)	KVERT reported that moderate explosive activity at Karymsky continued during 19-26 February. Satellite images detected a thermal anomaly on 22 February. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea | 24 February-1 March 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 24 February-1 March. The lava lake continued to circulate and spatter in the Overlook vent. Webcams recorded multiple incandescent outgassing vents within Pu'u 'O'o Crater and high on the northeast rim. During 24-25 and 29 February lava from at most two vents flowed onto the crater floor. 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 | 24 February-1 March 2016 | Continuing ActivityCite this Report
Masaya Nicaragua	INETER reported that the lava lakes in three vents on the floor of Masaya's Santiago crater were active during 20 February-1 March. Volcanic tremor remained high and RSAM values were at high to very high levels. On 23 February small explosions ejected spatter onto the crater floor. During fieldwork volcanologists observed active lava lakes in all three vents on the crater floor, and noted that the inner walls of the crater were being eroded due to the lava lake. A new vent was forming on the SE part of the crater floor. During a second visit on 24 February INETER staff noted that the vents had become larger due to landslides on the crater walls. Small streams of lava sporadically originated from the NE vent. By 1 March the two vents in the SW part of the crater had almost merged. Source: Instituto Nicaragüense de Estudios Territoriales (INETER)
Momotombo | 24 February-1 March 2016 | Continuing ActivityCite this Report
Momotombo Nicaragua	INETER reported that during 19 February-1 March explosions at Momotombo were detected daily; 88 explosions were detected during 1 December 2015-1 March 2016. Explosions produced ash plumes, and ejected incandescent material onto the N, NE, E, and SE flanks. Ash plumes rose 1.7-2.3 km above the crater and drifted SW during 21-22 February; gas-and-ash plumes rose 1.8 km on 24 February; an ash plume rose 1 km on 25 February; and a small gas-and-ash plume rose 300 m on 26 February. A pyroclastic flow traveled 3.5 km down the N and NW flanks during 23-24 February. Explosions on 27 February ejected tephra 300 m above the crater. At 0646 on 1 March explosions ejected gas and incandescent tephra; an ash plume rose 1.2 km and drifted W and SW. The gas-and-ash emissions lasted 16 minutes, causing the plume to widen and darken the sky. Source: Instituto Nicaragüense de Estudios Territoriales (INETER)
Nevado del Ruiz | 24 February-1 March 2016 | Continuing ActivityCite this Report
Nevado del Ruiz Colombia	Based on notices from the Bogota MWO, pilot observations, and wind data, the Washington VAAC reported that on 24 February an ash plume from Nevado del Ruiz possibly rose to altitudes of 5.5-6.1 km (18,000-20,000 ft) a.s.l. and drifted NW and S. According to the VAAC, SGC reported an ash emission on 29 February. Source: Washington Volcanic Ash Advisory Center (VAAC)
Sheveluch | 24 February-1 March 2016 | Continuing ActivityCite this Report
Sheveluch Central Kamchatka (Russia)	KVERT reported that during 19-26 February lava-dome extrusion onto Sheveluch’s N flank was accompanied by fumarolic activity, dome incandescence, ash explosions, and hot avalanches. 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 | 24 February-1 March 2016 | Continuing ActivityCite this Report
Sinabung Northwestern Sumatra	Based on satellite images, ground reports, and information from PVMBG, the Darwin VAAC reported that during 24 February-1 March ash plumes from Sinabung rose to altitudes of 3.6-4.3 km (12,000-14,000 ft) a.s.l. and drifted over 45 km in multiple directions. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Soputan | 24 February-1 March 2016 | Continuing ActivityCite this Report
Soputan Sulawesi	PVMBG reported that during 22-29 February diffuse white plumes from Soputan rose as high as 75 m above the crater. Seismicity was dominated by signals indicating avalanches and emissions, though shallow volcanic and low-frequency earthquakes were also detected. The Alert Level remained at 3 (on a scale of 1-4); residents and tourists were advised not to approach the craters within a radius of 6.5 km. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Tengger Caldera | 24 February-1 March 2016 | Continuing ActivityCite this Report
Tengger Caldera Eastern Java	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)
Zhupanovsky | 24 February-1 March 2016 | Continuing ActivityCite this Report
Zhupanovsky Eastern Kamchatka (Russia)	KVERT reported that moderate gas-and-steam activity at Zhupanovsky continued during 19-26 February. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 19,996 individual reports over 1,215 weeks (average of 16 per week) on 332 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.

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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)