All times are local unless otherwise stated.

Copahue (Chile-Argentina) | 26 March-1 April 2014 | New Activity / Unrest Cite this Report
Copahue Andean Southern Volcanic Arc	OVDAS-SERNAGEOMIN reported that cameras installed around Copahue recorded white gas plumes rising 100-600 m above the crater during 25-29 March; clouds prevented observations on 30 March. Sulfur dioxide measurements in tons per day were 270 on 26 March, 1,400 on 27 March, 2,000 on 28 March, 1,400 on 29 March, and 920 on 30 March. The Alert Level remained at Orange. Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Karkar (Papua New Guinea) | 26 March-1 April 2014 | New Activity / Unrest Cite this Report
Karkar Bismarck Volcanic Arc	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 26-27 March ash plumes from Karkar rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted almost 50 km ENE and NW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Krakatau (Indonesia) | 26 March-1 April 2014 | New Activity / Unrest Cite this Report
Krakatau Sunda Volcanic Arc	Based on a pilot observation, the Darwin VAAC reported that on 31 March an ash plume from Anak Krakatau rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted N. Ash was not identified in satellite images. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Merapi (Indonesia) | 26 March-1 April 2014 | New Activity / Unrest Cite this Report
Merapi Sunda Volcanic Arc	PVMBG reported explosions from Merapi on 9 March. An explosion detected at 0654 was followed by a plume observed on CCTV from Pasarbubar that drifted W. Two Explosions were also recorded at 0655. At 0708 a volcanic earthquake occurred and CCTV in Market Bubar recorded brown plumes that rose 1.5 km above the crater. At 0730 ash fell in the villages of Umbulharjo (30 km S), Kepuharjo, Sidorejo (27 km NNE), and Balerante (6 km SSE). During 14-20 March dense gas plumes rose 600 m. Seismicity was at normal levels. The Alert Level remained at 1 (on a scale of 1-4). Based on analysis of satellite images, the Darwin VAAC reported that on 27 March an ash plume rose to an altitude of 9.8 km (32,000 ft) a.s.l. and drifted SE. The VAAC noted that an eruption occurred around 0630, confirmed by a news article. Ash had dissipated the next day. Another news article noted that the increased activity lasted only four minutes, from 0112 to 0116, and that ashfall occurred on the S and SE flanks. Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC), The Jakarta Post, The Jakarta Post
Poas (Costa Rica) | 26 March-1 April 2014 | New Activity / Unrest Cite this Report
Poas Central America Volcanic Arc	OVSICORI-UNA reported that a strong phreatic eruption from Poás was recorded at 1532 on 30 March. The explosion ejected water, steam, gases, sediment, and fragments of altered rock 150 m above the crater lake’s surface. The report noted several small phreatic eruptions that ejected material less than 50 m high, as well as large gas bubbles and vapor in the middle of the lake, during February and March. Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
Reventador (Ecuador) | 26 March-1 April 2014 | New Activity / Unrest Cite this Report
Reventador Andean Northern Volcanic Arc	IG reported that activity at Reventador increased on 25 March. At 1830 an explosion was followed by a pyroclastic flow that traveled 500 m down the flanks. Strombolian activity produced gas-and-ash plumes that rose 1.5 km above the crater. During 26-29 March continuous tremor was interspersed with explosions and long-period earthquakes. Although cloud cover often prevented crater views, video cameras showed a lava flow traveling down the S flank and incandescent material erupting from the crater. Emissions with small amounts of ash rose 1 km on 28 March. Ashfall was reported in Hosteria El Reventador and camp San Rafael on the flanks. A load roar reported at 0300 on 31 March was followed by observations of incandescent material traveling 1 km down the S flank. Cloud cover prevented visual observations the next day. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Shishaldin (United States) | 26 March-1 April 2014 | New Activity / Unrest Cite this Report
Shishaldin Aleutian Ridge Volcanic Arc	AVO reported that ground-coupled air waves from small explosions at Shishaldin's summit area were detected in seismic data during 25-27 March, although the energy and rate of occurrence both declined over that time. Elevated surface temperatures were identified in satellite images on 27 March. Based on the elevated surface temperatures and explosions persistent since 18 March AVO raised the Aviation Color Code to Orange and the Volcano Alert Level to Watch on 28 March. Analysis of the data showed that the temperatures were consistent with an eruption of lava within the summit crater. Web-camera images, satellite data, and pilot observations during the previous week indicated only minor steam emissions from the summit crater; there had been no evidence of ash emissions. Explosions were detected during 29-30 March; elevated surface temperatures were identified during 30-31 March. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Slamet (Indonesia) | 26 March-1 April 2014 | New Activity / Unrest Cite this Report
Slamet Sunda Volcanic Arc	PVMBG reported that during 8-14 March dense white plumes rose as high as 1.2 km above Slamet, and ash plumes rose 800-1,000 m and drifted E. Incandescence from the crater was observed at 2148 during an eruption on 14 March. Brownish-white plumes rose 2 km on 15 March and ash plumes rose 1.2 km and again drifted E. During 22-28 March white-to-gray plumes rose 1.3 km. Dense gray ash plumes rose 2 km and drifted W. White plumes were observed on 29 March. Various seismic signals including shallow volcanic earthquakes, harmonic tremor, and volcanic earthquakes fluctuated during 8-28 March. Carbon dioxide emissions significantly increased during 17-20 March. PVMBG noted that activity, based on visual and instrument monitoring, continued to fluctuate; on 29 March the Alert Level remained at 2 (on a scale of 1-4). Residents and tourists were warned not approach the crater within a radius of 2 km. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Ubinas (Peru) | 26 March-1 April 2014 | New Activity / Unrest Cite this Report
Ubinas Andean Central Volcanic Arc	IGP's Observatorio Volcanologico de Arequipa (IGP-OVA) reported that volcanologists visiting Ubinas on 19 March observed that lava had continued erupt, covering the 120-m-wide crater floor. Seismic signals detected during 20-21 and 23 March indicating increased lava emissions. Gas-and-ash plumes rose as high as 1.3 km above the crater almost daily during 10-25 March; ashfall was reported on 25 March in nearby villages and noises from the volcano were audible in areas as far as 6 km SE. INGEMMET reported that on 26 March gas-and-ash emissions rose 1.2-1.7 km and drifted NE, E, and SW. Small amounts of fine ash fell within 4 km of the crater. Ash emissions on 27 March caused ashfall in Ubinas (6.5 km SSE), Querapi (4 km S), and Tonohaya (7 km SSE). Rockslides traveled down the SE flank. On 28 March residents of Ubinas reported noises from the volcano. Seismicity increased the next day and was characterized by long-period earthquakes and harmonic tremor. On 30 March gas-and-steam plumes rose as high as 1.2 km. A news article stated that residents of Querapi had started to evacuate. A low-energy explosion occurred at 0743 on 31 March and produced an ash plume that rose 1.2 km. More low-energy explosions followed: at 1119, 1306, 1518, and 1616. The explosions produced ash plumes that rose 1-1.8 km. Ashfall was reported in Ubinas and Querapi. Sources: Instituto Geológico Minero y Metalúrgico (INGEMMET), La República, Instituto Geofísico del Perú (IGP)

Aira (Japan) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	JMA reported that 20 explosions from Showa Crater at Aira Caldera’s Sakurajima volcano during 24-28 March ejected tephra as far as 1,300 m. Incandescence from the crater was detected at night on 25 March. The Alert Level remained at 3 (on a scale of 1-5). The Tokyo VAAC reported an explosion on 26 March. During 27-29 March plumes rose to altitudes of 1.8-2.4 km (6,000-8,000 ft) a.s.l. and drifted SE, N, and NW. Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Batu Tara (Indonesia) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Batu Tara Sunda Volcanic Arc	Based on analyses of satellite imagery and wind data, the Darwin Volcanic Ash Advisory Centre (VAAC) reported that on 26 March an ash plume from Batu Tara drifted almost 30 km W. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Chirinkotan (Russia) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Chirinkotan Kuril Volcanic Arc	SVERT reported that satellite images of Chirinkotan showed diffuse gas-and-steam emissions on 24 March and steam-and-gas plumes drifting 80-170 km SE during 26-27 March. Cloud cover obscured views on the other days during 25-31 March. The Aviation Color Code remained at Yellow. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Chirpoi (Russia) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Chirpoi Kuril Volcanic Arc	SVERT reported that on 27 March satellite images over Snow, a volcano of Chirpoi, detected a thermal anomaly and a steam-and-gas plume drifting more than 50 km SE. A weak thermal anomaly was detected on 28 March. Cloud cover obscured views on the other days during 24-31 March. The Aviation Color Code remained at Yellow. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Dukono (Indonesia) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 27-28 March ash plumes from Dukono rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 65-150 km W and NW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Etna (Italy) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Etna Sicily Volcanic Province	INGV reported that Strombolian activity from Etna's New Southeast Crater (NSEC) cone ceased during the night of 26-27 March, after 64 days of persistent activity. Lava emissions from the lower side of the NSEC significantly decreased; on the evening of 28 March a small lava flow continued to advance but had stopped and was cooling the next day. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Grimsvotn (Iceland) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Grimsvotn Iceland Neovolcanic Rift Zone	According to the Icelandic Meteorological Office, a small glacial outburst flood (jokulhlaup) from Grímsvötn's subglacial lake was occurring on 27 March, increasing the water level in the Gígjukvísl River; it was expected to peak by the end of the week and remain small. Electrical conductivity measurements indicated a considerable increase of a geothermal contribution to the river water. Seismic tremor had increased due to the flood and not volcanic activity. The report warned that hydrogen sulfide released from the floodwater as it drains is particularly potent at the river outlet at the ice margin, where concentrations may reach poisonous levels. Source: Icelandic Meteorological Office (IMO)
Karymsky (Russia) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that Vulcanian and Strombolian activity at Karymsky continued during 21-28 March. Satellite images detected a bright thermal anomaly on the volcano daily. Ash plumes rose to altitudes of 1.5-2 km (3,300-6,600 ft) a.s.l. and drifted 180 km SW and SE during 20, 24, and 27 March. On 28 March ash plumes rose to altitudes of 2-2.5 km (6,600-8,200 ft) a.s.l. and drifted 100 km ESE. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea (United States) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 26 March-1 April HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kilauea's Halema'uma'u Crater. Gas emissions remained elevated. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas; smaller particles may have been dropped several kilometers away. At Pu'u 'O'o Crater, glow emanated from spatter cones on the N and S portions of the crater floor, and from the lava pond in the NE spatter cone. The Kahauale’a 2 lava flow, fed by the NE spatter cone, continued to advance, with breakout lava flows from the main stalled lobe, and burn adjoining forest. A satellite image acquired on 27 March showed active breakouts 5.5 and 8 km NE of Pu’u 'O'o. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Sheveluch (Russia) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 21-28 March lava-dome extrusion at Shiveluch was accompanied by ash explosions, incandescence, hot avalanches, and fumarolic activity. A bright thermal anomaly was detected daily in satellite images. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sinabung (Indonesia) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Sinabung Sunda Volcanic Arc	Based on webcam images, the Darwin VAAC reported that on 29 March an ash plume from Sinabung rose to an altitude of 4.3 km (14,000 ft) a.s.l. Meteorological cloud cover prevented satellite views. Gas emissions were noted on 30 March. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Tungurahua (Ecuador) | 26 March-1 April 2014 | Continuing ActivityCite this Report
Tungurahua Andean Northern Volcanic Arc	IG reported that cloud cover occasionally prevented observations of Tungurahua during 26 March-1 April, although on clear days no surface activity was observed. Minor ashfall was reported in El Manzano (8 km SW) and Cahuaji on 26 March. Seismicity was at moderate levels and then declined during 28 March-1 April. Lahars on 31 March traveled down the Vascún (N) and Mapayacu (SW) drainages, carrying blocks up to 1 m in diameter in the latter drainage. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

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.

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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)