All times are local unless otherwise stated.

Colima (Mexico) | 4 February-10 February 2015 | New Activity / Unrest Cite this Report
Colima Trans-Mexican Volcanic Belt	Based on webcam views, Colima Tower, Mexico City MWO, and Colima Observatory notices, and satellite images, the Washington VAAC reported that on 4 February a small ash puff from Colima drifted E. Later that day an emission rose to an altitude of 7.3 km (24,000 ft) a.s.l. and drifted E, and two additional ash clouds drifted E. On 5 February multiple ash emissions, mostly diffuse, drifted E and NE. One ash plume rose to an altitude of 7.9 km (26,000 ft) a.s.l. and moved ENE. In a 7 February bulletin, the Unidad Estatal de Protección Civil reported that Colima remained active, although there continued to be a slight decrease in the number and size of lava-block avalanches. Lava flows minimally advanced, and small landslides of lava blocks were observed. Explosions continued but also decreased in intensity. Residents were warned not go within 5 km of the volcano. Sources: Unidad Estatal de Protección Civil de Colima, Washington Volcanic Ash Advisory Center (VAAC)
Fuego (Guatemala) | 4 February-10 February 2015 | New Activity / Unrest Cite this Report
Fuego Central America Volcanic Arc	INSIVUMEH reported that during 5-6 February explosions at Fuego ejected incandescent tephra 150 m above the crater, causing avalanches in the Taniluya (SSW), Ceniza, and Trinidad (S) drainages. Shock waves rattled nearby structures. Ash plumes rose 550 m above the crater and drifted 11-12 km S and SW. A Strombolian eruption commenced on 7 February; plumes with water vapor and ash rose as high as 1.3 km and drifted 20 km NW. Pyroclastic flows descended multiple drainages. CONRED reported that ash fell in Guatemala City (about 35 km ENE) and flights were diverted to El Salvador. On 8 February, although activity had decreased, the seismic network detected 30 explosions per minute. Explosions sounded like locomotives and generated shock waves detected in areas 15 km S and SW. Lava flows were at most 2 km long in the El Jute (SE) and Trinidad (S) drainages, reaching vegetated areas and causing fires. In a special notice INSIVUMEH stated that activity levels had returned to normal; weak to moderate explosions produced ash plumes that rose 550 m and drifted 8-10 km NW. Morphological changes had occurred on the S flank from pyroclastic flows. Avalanches from the lava flows also descended the southern flanks. Explosions during 9-10 February generated ash plumes that rose 800 m and drifted 11-12 km S and SW. Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Coordinadora Nacional para la Reducción de Desastres (CONRED)
Karymsky (Russia) | 4 February-10 February 2015 | New Activity / Unrest Cite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that during 30 January-6 February a moderate explosive eruption at Karymsky continued. Satellite images showed a thermal anomaly over the volcano during 30-31 January, and ash plumes that rose 2.5-3 km (8,200-9,800 ft) a.s.l. and drifted 85 km E on 31 January. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Klyuchevskoy (Russia) | 4 February-10 February 2015 | New Activity / Unrest Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that during 30 January-6 February a Strombolian and Vulcanian eruption at Klyuchevskoy continued. Incandescence at the summit was visible and bombs were ejected 200-300 m above the crater. Explosions generated ash plumes that rose to altitudes of 5-6 km (16,400-19,700 ft) a.s.l.; ashfall was reported in Klyuchi Village (30 km NNE) on 5 February. A lava flow effused onto the E flank. Satellite images showed a daily, big, bright thermal anomaly over the volcano, and ash-and-gas plumes drifting in multiple directions at altitudes of 5.5-6 km (18,000-19,700 ft) a.s.l. During 4-5 February ash plumes drifted about 1,000 km NW and N. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Pacaya (Guatemala) | 4 February-10 February 2015 | New Activity / Unrest Cite this Report
Pacaya Central America Volcanic Arc	INSIVUMEH reported that during 5-10 February fumarolic plumes from Pacaya's Mackenney Crater drifted 700-800 m S and SW. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Piton de la Fournaise (France) | 4 February-10 February 2015 | New Activity / Unrest Cite this Report
Piton de la Fournaise Reunion Hotspot Volcano Group	OVPDLF reported that 180 earthquakes at Piton de la Fournaise were recorded from 0400 to 0900 on 4 February, including five events greater than M 2. A seismic crisis began at 0910, tremor was recorded at 1050, and an eruption began at 1100. Observers noted that a fissure had opened on the S flank, triggering an Alert Level 2-2 (ongoing eruption) and the restriction of access by the public to the summit area. The fissure was 500 m long, starting from an area located 100 m outside and to the W of Bory Crater. Activity was concentrated on the southernmost part of the fissure. Lava was ejected from the vent about 10 m high and rapidly flowed SSW towards the Rivals Crater, branched, and spread in an area S and SE of the crater. By the late afternoon the farthest-reaching branch had traveled past Cornu Crater. Tremor levels decreased through the day and were relatively low by 1800; on 6 February tremor levels were very low. Small cones had formed over the vents and produced low gas plumes. Inclement weather reduced visibility of the eruption site, although on 8 February observers noted that lava continued to flow from the vents, and another flow traveled further W. On 9 February a vent was weakly active with small explosions and small splashes of lava. Tremor remained stable and low on 10 February. Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)
Sangay (Ecuador) | 4 February-10 February 2015 | New Activity / Unrest Cite this Report
Sangay Northern Andean Volcanic Arc	Based on a pilot observation, the Washington VAAC reported that on 4 February an ash plume from Sangay rose to an altitude of 6.7 km (22,000 ft) a.s.l. Satellite images showed a possible ash plume drifting less than 20 km SW. A thermal anomaly was visible in satellite images the next day, as well as a diffuse plume with possible ash drifting W. Source: Washington Volcanic Ash Advisory Center (VAAC)
Soputan (Indonesia) | 4 February-10 February 2015 | New Activity / Unrest Cite this Report
Soputan Sangihe Volcanic Arc	Based on satellite images and weather models, the Darwin VAAC reported that on 8 February an ash plume from Soputan rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 30 km SSE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Villarrica (Chile) | 4 February-10 February 2015 | New Activity / Unrest Cite this Report
Villarrica Southern Andean Volcanic Arc	Projecto Observación Visual Volcán Villarrica (POVI) reported that at night during 4-5 February faint incandescence was detected with a near-infrared camera. On 5 February Strombolian explosions ejected tephra several hundred meters high. On 6 February tephra was ejected about 65 m above the crater rim and two consecutive ash emissions were observed. OVDAS-SERNAGEOMIN reported that the Alert Level for Villarrica was raised to Yellow (the second lowest level on a four-color scale) due to the increased seismicity, indicating a fluctuating lava lake and small explosions. Scientists noted a rise in the lava-lake level during an overflight. POVI reported that on the morning of 7 February bombs were ejected from the crater, some almost 5 m in diameter. Later that day the intensity of the explosions decreased and crater incandescence became irregular. Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Proyecto Observación Villarrica Internet (POVI)

Aira (Japan) | 4 February-10 February 2015 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	The Tokyo VAAC reported that during 28 January-3 February plumes from Aira Caldera’s Sakurajima volcano rose to altitudes of 1.5-3.3 km (5,000-11,000 ft) a.s.l. and drifted NE, E, SE, and S. On 1 February pilots observed ash plumes that rose to altitudes of 2.7-3.3 km (9,000-11,000 ft) a.s.l. JMA reported that nine explosions from Showa Crater ejected tephra as far as 1,800 m during 26-30 January. Incandescence from the crater was visible at night, and inflation continued to be detected. An explosion on 30 January caused tephra fall (2 cm in diameter) in Kagoshima Kurokami (3.5 km E). The Alert Level remained at 3 (on a scale of 1-5). Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Asosan (Japan) | 4 February-10 February 2015 | Continuing ActivityCite this Report
Asosan Nankai Volcanic Arc	JMA reported that, based on seismicity and infrasound data, the eruption from Asosan’s Nakadake Crater that began on 25 November 2014 continued intermittently during 2-6 February. Incandescent material was sometimes ejected onto the crater rim, and plumes rose 1 km above the crater. High-amplitude tremor continued. The Alert Level remained at 2 (on a scale of 1-5). Source: Japan Meteorological Agency (JMA)
Bardarbunga (Iceland) | 4 February-10 February 2015 | Continuing ActivityCite this Report
Bardarbunga Iceland Neovolcanic Rift Volcanic Province	During 4-10 February, IMO maintained Aviation Colour Code Orange due to continued activity at Bárdarbunga’s Holuhraun eruptive fissure. A 6 February statement noted that although there was a visible reduction in activity during the previous two weeks, seismicity remained strong. Local air pollution from gas emissions persisted and GPS measurements showed that subsidence continued. Source: Icelandic Meteorological Office (IMO)
Chirinkotan (Russia) | 4 February-10 February 2015 | Continuing ActivityCite this Report
Chirinkotan Kuril Volcanic Arc	SVERT reported that weak steam-and-gas emissions from Chirinkotan were detected in satellite images on 6 and 8 February. Cloud cover obscured views on the other days during 2-9 February. The Aviation Color Code remained at Yellow. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Kilauea (United States) | 4 February-10 February 2015 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 4-10 February HVO reported that Kilauea’s 27 June NE-trending lava flow continued to be active with several small breakouts across the interior and edges of the lobes, upslope of the leading front. The most northern lobe of lava remained about 500 m above Highway 130, near police and fire stations. At Pu'u 'O'o Crater, glow emanated from several outgassing openings in the crater floor. The circulating lava lake occasionally rose and fell in the deep pit within Halema'uma'u Crater. Gas emissions remained elevated. The plume from the vent continued to deposit variable amounts tephra onto nearby areas. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Sheveluch (Russia) | 4 February-10 February 2015 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 30 January-6 February lava-dome extrusion onto Sheveluch’s N flank was accompanied by incandescence, hot block avalanches, and fumarolic activity. Strong explosions on 1 and 4 February generated ash plumes that rose to altitudes of 10 and 6 km (32,800 and 19,700 ft) a.s.l., respectively. Satellite images detected ash plumes drifting NE and N more than 800 km during 1-2 February and 90 km during 4-5 February. A thermal anomaly over the dome was detected daily. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Shishaldin (United States) | 4 February-10 February 2015 | Continuing ActivityCite this Report
Shishaldin Aleutian Ridge Volcanic Arc	AVO reported that seismicity at Shishaldin continued to be slightly elevated over background levels during 4-10 February. Elevated surface temperatures were observed in satellite images on most days, and minor steam emissions were recorded by the web cam during 6-9 February. Low-level eruptive activity confined to the summit crater likely continued. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Sinabung (Indonesia) | 4 February-10 February 2015 | Continuing ActivityCite this Report
Sinabung Sunda Volcanic Arc	Based on satellite images, weather models, and ground observations, the Darwin VAAC reported that on 9 February an ash plume from Sinabung rose to an altitude of 4 km (13,000 ft) a.s.l. and drifted 10-30 km W. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Zhupanovsky (Russia) | 4 February-10 February 2015 | Continuing ActivityCite this Report
Zhupanovsky Eastern Kamchatka Volcanic Arc	KVERT reported that a moderate eruption at Zhupanovsky continued during 30 January-6 February. Satellite images detected a daily thermal anomaly over the volcano. 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 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.

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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)