All times are local unless otherwise stated.

Asosan (Japan) | 10 April-16 April 2019 | New Activity / Unrest Cite this Report
Asosan Nankai Volcanic Arc	JMA reported an increase in the amplitude of volcanic tremor at Asosan on 14 April, increasing the possibility of an eruption at Nakadake Crater. The Alert Level was raised to 2 (on a scale of 1-5). Tremor amplitude further increased on 15 April. A very small eruption was recorded at 1828 on 16 April, producing a plume that rose 200 m above the crater rim and drifted NW. Source: Japan Meteorological Agency (JMA)
Tengger Caldera (Indonesia) | 10 April-16 April 2019 | New Activity / Unrest Cite this Report
Tengger Caldera Sunda Volcanic Arc	The Darwin VAAC reported that during 10-11 and 15-16 April ash plumes from Tengger Caldera’s Bromo cone rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted in multiple directions, based on webcam images and satellite data. The Alert Level remained at 2 (on a scale of 1-4), and visitors were warned to stay outside of a 1-km radius of the crater. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Villarrica (Chile) | 10 April-16 April 2019 | New Activity / Unrest Cite this Report
Villarrica Andean Southern Volcanic Arc	POVI reported that during 14-15 April lava fountains at Villarrica were visible rising as high as 70 m above the crater rim. Seismicity was low. Source: Proyecto Observación Villarrica Internet (POVI)

Agung (Indonesia) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Agung Sunda Volcanic Arc	PVMBG reported that at 1847 on 11 April an explosion at Agung produced a dense gray ash plume that rose 2 km above the crater rim and drifted W. The Alert Level remained at 3 (on a scale of 1-4) with the exclusion zone set at a 4-km radius. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Aira (Japan) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	JMA reported that incandescence from Minamidake crater (at Aira Caldera’s Sakurajima volcano) was occasionally visible during 12-15 April. Two events and one explosion generated plumes that rose a maximum of 2.2 km above the crater rim and ejected material as far as 700 m. The Alert Level remained at 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Dukono (Indonesia) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on satellite and wind model data, the Darwin VAAC reported that during 10-12 and 15-16 April ash plumes from Dukono rose as high as 2.4 km (8,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and visitors were warned to remain outside of the 2-km exclusion zone. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Ebeko (Russia) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Ebeko Kuril Volcanic Arc	Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions on 9 April that sent ash plumes up to 2.2 km (7,200 ft) a.s.l. Weather clouds obscured views on the other days during 5-12 April. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Etna (Italy) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Etna Sicily Volcanic Province	INGV reported that during 8-14 April gas emissions of variable intensity rose from Etna’s summit craters. During each night webcams recorded pulsating flashes from the E vent in New Southeast Crater (NSEC) which became more intense towards the end of the week. A minor ash emission from Bocca Nuova Crater was visible at 0520 on 8 April. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Fuego (Guatemala) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Fuego Central America Volcanic Arc	INSIVUMEH reported that during 10-11 April steaming lahars descended Fuego’s Las Lajas (SE), El Jute (SE), Ceniza (SSW), and Taniluyá (SW) drainages, carrying blocks up to 3 m in diameter, and branches and tree trunks. On 11 April lahars were 3 m deep and 20 m wide. During 11-15 April there were 12-22 explosions per hour, generating ash plumes that rose almost 1.1 km and drifted10-15 km N, NE, E, and W. Minor ashfall was reported in areas downwind including Alotenango, Ciudad Vieja (13.5 km NE), La Réunion, Yepocapa (8 km N), Morelia (9 km SW), Santa Sofia (12 km SW), and Panimache (8 km SW). Shock waves sometimes vibrated residential structures. Incandescent material was ejected 100-300 m high and caused avalanches of material that occasionally traveled long distances down Seca, Taniluyá, Ceniza, Trinidad, Las Lajas, and Honda ravines. A lava flow, 400-500 m long, advanced in the Seca drainage. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Ibu (Indonesia) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Ibu Halmahera Volcanic Arc	The Darwin VAAC reported that on 10 April ash plumes from Ibu were identified in satellite images drifting N at an altitude of 2.1 km (7,000 ft) a.s.l. During 15-16 April ash plumes drifted N and NE at an altitude of 2.4 km (8,000 ft) a.s.l. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Kadovar (Papua New Guinea) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Kadovar Bismarck Volcanic Arc	Based on satellite data and wind model data, the Darwin VAAC reported that on 10 April an ash plume from Kadovar rose to an altitude of 1.2 km (4,000 ft) a.s.l. and drifted SE and E. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karangetang (Indonesia) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Karangetang Sangihe Volcanic Arc	Based on analyses of satellite imagery and model data, the Darwin VAAC reported that on 16 April an ash emission from Karangetang rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted W. The Alert Level remained at 2 (on a scale of 1-4). Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Kerinci (Indonesia) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Kerinci Sunda Volcanic Arc	PVMBG reported that at 1559 on 13 April and 0629 on 14 April brownish ash plumes rose 400 m above Kerinci’s crater rim and drifted E and NE, respectively, as noted by a ground-based observer. The Alert Level remained at 2 (on a scale of 1-4), and tourists were warned to remain outside of the 3-km exclusion zone. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Krakatau (Indonesia) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Krakatau Sunda Volcanic Arc	PVMBG reported that an eruption at Anak Krakatau was recorded by the seismic network at 0932 on14 April. An ash plume drifted NE. An event was recorded at 2358 on 15 April, though no ash plume was visible. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to remain outside of the 2-km radius hazard zone from the crater. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Merapi (Indonesia) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Merapi Sunda Volcanic Arc	PVMBG reported that during 5-11 April the lava dome at Merapi continued to grow slowly, with extruded material channeled into the SE-flank Gendol River drainage. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to remain outside of the 3-km exclusion zone. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Rincon de la Vieja (Costa Rica) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Rincon de la Vieja Central America Volcanic Arc	OVSICORI-UNA reported that an eruption at Rincón de la Vieja recorded at 0617 on 10 April produced a gas-and-steam plume that rose 1 km above the crater rim and drifted SE. At 0643 on 12 April a plume rose 500 m. Another event was detected at 0700 on 13 April, although poor weather conditions prevented visual observations. On 14 April OVSICORI-UNA noted that aerial photographs taken during an overflight showed a milky-gray acid lake at a relatively low water level with convection cells of several tens meters of diameter in the center and Eastern parts of the lake. Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
Ruapehu (New Zealand) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Ruapehu Taupo Volcanic Zone	GeoNet reported that, at least for the last 10 years of continuous lake-temperature monitoring, heating cycles at Ruapehu’s summit Crater Lake have occurred over periods of about 12 months with temperatures ranging from 15 to 45 degrees Celsius. However, the temperature remained elevated at 30 degrees for a period of six months starting in September 2018. GeoNet noted that during the previous two weeks the lake temperature increased further, at a rate of around a half of a degree per day, to 42 degrees on 9 April. Tremor levels also increased. The Volcanic Alert Level remained at 1 (minor volcanic unrest) and the Aviation Color Code remained at Green. Source: GeoNet
Sheveluch (Russia) | 10 April-16 April 2019 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that a thermal anomaly over Sheveluch’s lava dome was identified daily in satellite images during 6-12 April. Explosions on 10 April generated ash plumes that rose to 8-9 km (26,200-29,500 ft) a.s.l. and drifted about 1,300 km SSE. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

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)