All times are local unless otherwise stated.

Cleveland (United States) | 13 November-19 November 2019 | New Activity / Unrest Cite this Report
Cleveland Aleutian Ridge Volcanic Arc	AVO lowered the Volcano Alert Level for Cleveland to Advisory and the Aviation Color Code to Yellow on 15 November, noting that new satellite data and reanalysis of previous data over the past week showed that lava effusion likely had not begun on 8 November. Regional seismic and infrasound data showed no evidence of eruptive activity during 8-19 November; weakly-to-moderately elevated surface temperatures were sometimes identified in satellite images and steam plumes were sometimes visible in webcam images. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Kirishimayama (Japan) | 13 November-19 November 2019 | New Activity / Unrest Cite this Report
Kirishimayama Ryukyu Volcanic Arc	The number of volcanic earthquakes with hypocenters just below Shinmoedake (Shinmoe peak), a stratovolcano of the Kirishimayama volcano group, increased around 1900 on 17 November and continued to increase through the next day. JMA raised the Alert Level to 2 (on a scale of 1-5) on 18 November. Bad weather conditions prevented visual webcam observations. Source: Japan Meteorological Agency (JMA)
Lateiki (Tonga) | 13 November-19 November 2019 | New Activity / Unrest Cite this Report
Lateiki Tofua Volcanic Arc	Satellite images showed that the mid-October eruption at Lateiki (Metis Shoal) had formed a new and larger island, but by 14 November it had eroded to a size similar to the pre-eruptive size. Source: Simon Carn
Shishaldin (United States) | 13 November-19 November 2019 | New Activity / Unrest Cite this Report
Shishaldin Aleutian Ridge Volcanic Arc	AVO reported that the eruption at Shishaldin continued at variable levels during 13-19 November. Seismicity increased during 13-14 November, and elevated surface temperatures were visible in satellite and webcam data. Minor ash emissions were visible and likely resulting from spatter cone collapses. Lava and debris flows had not advanced since 8 November; lava flows had traveled as far as 1.2 km and a large branched network of debris flows extended at least 5.5 km NE. Strongly elevated surface temperatures and a steam plume drifting more than 100 km SE were visible on 15 November. An incandescent lava flow on the NE flank was recorded in webcam images. Activity during 17-18 November was characterized by low seismic tremor and weakly-to-moderately elevated surface temperatures, consistent with cooling lava flows. Seismicity and surface temperatures again increased during 18-19 November. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Whakaari/White Island (New Zealand) | 13 November-19 November 2019 | New Activity / Unrest Cite this Report
Whakaari/White Island Taupo Volcanic Zone	GeoNet reported that minor increases in sulfur dioxide emission had been detected at White Island over the past several weeks, and the level of volcanic tremor increased from weak to moderate levels during the previous few weeks. The report noted that the changes are not uncommon and could be related to a variety of processes, though the elevated activity was above the expected range for minor volcanic unrest and associated hazards; GeoNet raised the Volcanic Alert Level for White Island to 2 and the Aviation Color Code to Yellow on 15 November. Source: GeoNet

Aira (Japan) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	JMA reported that incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible at night during 11-18 November. There were 27 explosions and 29 non-explosive eruptive events detected by the seismic network. Ash plumes rose as high as 2.5 km above the crater rim and blocks were ejected 600-900 m away. An explosion at 0200 on 13 November generated an ash plume that rose 3.6 km and ejected large blocks that fell 1.7 km away. The Alert Level remained at 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Asosan (Japan) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Asosan Nankai Volcanic Arc	JMA reported that the eruption at Asosan that began on 7 October continued through 18 November. The Tokyo VAAC reported that during 13-18 November ash plumes rose to 1.5-2.4 km (5,000-8,000 ft) a.s.l. and drifted in multiple directions. On 18 November JMA confirmed ashfall in downwind areas. Source: Japan Meteorological Agency (JMA)
Dukono (Indonesia) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on satellite and wind model data, and information from PVMBG, the Darwin VAAC reported that during 6-12 November ash plumes from Dukono rose to an altitude of 2.1-2.3 km (7,000-8,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone. Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)
Ebeko (Russia) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Ebeko Kuril Volcanic Arc	Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 11-12 and 14 November that sent ash plumes up to 3 km (10,00 ft) a.s.l. Ash plumes drifted E and NE. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Karangetang (Indonesia) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Karangetang Sangihe Volcanic Arc	PVMBG reported that during 11-17 November lava continued to effuse from Karangetang’s Main Crater (S), traveling as far as 1.8 km down the Nanitu, Pangi, and Sense drainages on the SW and W flanks. Sometimes dense white plumes rose to 400 m above the summit. Incandescence from both summit craters was visible at night. The Alert Level remained at 2 (on a scale of 1-4). Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Klyuchevskoy (Russia) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that a thermal anomaly over Klyuchevskoy was identified in satellite images during 8 and 10-13 November. Strong crater incandescence was visible at night during 10-11 November. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Krakatau (Indonesia) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Krakatau Sunda Volcanic Arc	PVMBG reported that sometimes during 11-17 November dense white plumes rose as high as 150 m above Anak Krakatau’s active vent. The seismic network detected one eruptive event; dense gray-to-black plumes rose as high as 300 m above the vent. The Alert Level remained at 2 (on a scale of 1-4), and the public was 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) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Merapi Sunda Volcanic Arc	PVMBG reported that after the eruption at Merapi on 9 November seismicity increased and remained elevated. At 1046 on 17 November an eruption was recorded by the seismic network for two minutes and 35 seconds. An ash plume rose around 1 km above the crater rim and a pyroclastic flow traveled less than 1 km SE down the Gendol drainage. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to stay outside of the 3-km exclusion zone. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Nevados de Chillan (Chile) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Nevados de Chillan Southern Andean Volcanic Arc	ONEMI and SERNAGEOMIN reported that during 12-19 November white-to-gray plumes from Nevados de Chillán’s Nicanor Crater rose 450-900 m above the rim and drifted SE and NE. Occasional explosions ejecting incandescent material onto the flank were visible at night. The volcano Alert Level remained at Orange, the second highest level on a four-color scale. ONEMI maintained an Alert Level Yellow (the middle level on a three-color scale) for the communities of Pinto, Coihueco, and San Fabián, and stated that the public should stay at least 3 km away from the crater on the SW flank and 5 km away on the ENE flank. Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI)
Sabancaya (Peru) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Sabancaya Central Andean Volcanic Arc	Instituto Geofísico del Perú (IGP) reported that an average of 50 explosions of low-to-medium intensity per day occurred at Sabancaya during 11-17 November. Gas-and-ash plumes rose as high as 2.5 km above the summit and drifted SE and S. There were seven thermal anomalies identified in satellite data. The Alert Level remained at Orange (the second highest level on a four-color scale) and the public were warned to stay outside of a 12-km radius. Source: Instituto Geofísico del Perú (IGP)
Sangeang Api (Indonesia) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Sangeang Api Sunda Volcanic Arc	The Darwin VAAC reported that during 14-19 November discrete and short-lived ash emissions from Sangeang Api rose to 2.4 km (8,000 ft) a.s.l. and drifted NW and W. Thermal anomalies were recorded at least during 18-19 November. The Alert Level remained at 2 (on a scale of 1-4). Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Sheveluch (Russia) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 8-15 November. An ash plume rose to 9-10 km (29,500-32,800 ft) a.s.l. on 11 November; ash plumes drifted as far as 1,300 km ESE during 11-12 November. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Suwanosejima (Japan) | 13 November-19 November 2019 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Volcanic Arc	JMA reported that incandescence at Suwanosejima’s Ontake Crater was visible during 8-15 November. Occasional eruptive events during 13-15 November generated grayish white plumes that rose as high as 1.5 km above the crater rim. Ashfall was reported in Toshima Village (4 km SSW) on 14 November. The Alert Level remained at 2 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,627 individual reports over 1,243 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)