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Smithsonian / USGS Weekly Volcanic Activity Report

Weekly Volcanic Activity Map

The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program. Updated by 2300 UTC every Wednesday and averaging 16 reported volcanoes, this is not a comprehensive list of all eruptions this week, but rather a summary of activity that meet criteria discussed in the "Criteria and Disclaimers" section below.

Volcanic activity reported here is preliminary and subject to change. Carefully reviewed, detailed narratives over longer time periods are published as reports of the Bulletin of the Global Volcanism Network available through volcano profile pages.

Smithsonian / USGS Weekly Volcanic Activity Report for the week of 13 November-19 November 2024
Name Country Volcanic Province Eruption Start Date Report Status
Ahyi United States Mariana Volcanic Arc New
Iya Indonesia Sunda Volcanic Arc New
Kanlaon Philippines Negros-Sulu Volcanic Arc New
Karangetang Indonesia Sangihe Volcanic Arc New
Lewotobi Indonesia Sunda Volcanic Arc 2023 Dec 23 New
Lokon-Empung Indonesia Sangihe Volcanic Arc New
Marapi Indonesia Sunda Volcanic Arc 2023 Dec 3 New
Sheveluch Russia Eastern Kamchatka Volcanic Arc 1999 Aug 15 New
Aira Japan Ryukyu Volcanic Arc 2017 Mar 25 Continuing
Dukono Indonesia Halmahera Volcanic Arc 1933 Aug 13 Continuing
Great Sitkin United States Aleutian Ridge Volcanic Arc 2021 May 25 Continuing
Ibu Indonesia Halmahera Volcanic Arc 2008 Apr 5 Continuing
Karymsky Russia Eastern Kamchatka Volcanic Arc 2024 Jun 20 Continuing
Katmai United States Alaska Peninsula Volcanic Arc Continuing
Manam Papua New Guinea Bismarck Volcanic Arc 2018 May 10 ± 10 days Continuing
Popocatepetl Mexico Trans-Mexican Volcanic Belt 2005 Jan 9 Continuing
Reventador Ecuador Northern Andean Volcanic Arc 2008 Jul 27 Continuing
Sabancaya Peru Central Andean Volcanic Arc 2016 Nov 6 Continuing
Sangay Ecuador Northern Andean Volcanic Arc 2019 Mar 26 Continuing
Santa Maria Guatemala Central America Volcanic Arc 1922 Jun 22 Continuing
Semeru Indonesia Sunda Volcanic Arc 2017 Jun 6 Continuing
Suwanosejima Japan Ryukyu Volcanic Arc 2004 Oct 23 Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,697 individual reports over 1,246 weeks (average of 17 per week) on 338 different volcanoes.

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Adams Cotopaxi Iliwerung Llaima Popocatepetl Sumisujima
Agung Cuicocha Inielika Lokon-Empung Purace Sundoro
Ahyi Cumbal Ioto Lonquimay Puyehue-Cordon Caulle Suoh
Aira Dabbahu Irazu Lopevi Rabaul Suretamatai
Akan Davidof Iwatesan Machin Raikoke Suwanosejima
Alaid Dempo Iya Makushin Ranakah Taal
Alu-Dalafilla Descabezado Grande Izu-Torishima Maly Semyachik Raoul Island Tair, Jebel at
Ambae Dieng Volcanic Complex Jackson Segment Manam Rasshua Takawangha
Ambang Dukono Kaba Manda Hararo Raung Talang
Ambrym East Epi Kadovar Marapi Redoubt Tambora
Anatahan Ebeko Kaitoku Seamount Maroa Reventador Tanaga
Aniakchak Ebulobo Kama'ehuakanaloa Martin Reykjanes Tandikat-Singgalang
Antillanca Volcanic Complex Edgecumbe Kambalny Masaya Rincon de la Vieja Tangkoko-Duasudara
Antuco Egon Kanaga Matthew Island Rinjani Tangkuban Parahu
Apoyeque Ekarma Kanlaon Maule, Laguna del Ritter Island Tara, Batu
Arenal Eldey Karangetang Mauna Loa Rotorua Ta'u
Asamayama Erebus Karkar Mayon Ruang Taupo
Askja Erta Ale Karthala McDonald Islands Ruapehu Telica
Asosan Etna Karymsky Melebingoy Ruby Tenerife
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Kasatochi Melimoyu Ruiz, Nevado del Tengger Caldera
Augustine Eyjafjallajokull Katla Merapi Sabancaya Three Sisters
Avachinsky Fagradalsfjall Katmai Midagahara Sakar Tinakula
Awu Fernandina Kavachi Misti, El Salak Tofua
Axial Seamount Fogo Kelimutu Miyakejima San Cristobal Tokachidake
Azul, Cerro Fonualei Kelud Momotombo San Miguel Tolbachik
Azumayama Fournaise, Piton de la Kerinci Monowai San Vicente Toliman
Bagana Fourpeaked Ketoi Montagu Island Sangay Tongariro
Balbi Fuego Kharimkotan Moyorodake [Medvezhia] Sangeang Api Trident
Bamus Fujisan Kick 'em Jenny Mutnovsky Santa Ana Tungurahua
Banda Api Fukutoku-Oka-no-Ba Kie Besi Myojinsho Santa Maria Turrialba
Bardarbunga Galeras Kikai Nabro Sao Jorge Ubinas
Barren Island Galunggung Kilauea Negra, Sierra Sarigan Ugashik-Peulik
Batur Gamalama Kirishimayama Negro, Cerro Sarychev Peak Ukinrek Maars
Bezymianny Gamkonora Kita-Ioto Nightingale Island Saunders Ulawun
Bogoslof Gareloi Kizimen Nishinoshima Savo Unnamed
Brava Gaua Klyuchevskoy Nisyros Semeru Unnamed
Bristol Island Gorely Kolokol Group Novarupta Semisopochnoi Veniaminof
Bulusan Great Sitkin Koryaksky NW Rota-1 Seulawah Agam Villarrica
Calbuco Grimsvotn Krakatau Nyamulagira Sheveluch Vulcano
Callaqui Guagua Pichincha Krummel-Garbuna-Welcker Nyiragongo Shishaldin West Mata
Cameroon Guallatiri Krysuvik-Trolladyngja Ofu-Olosega Simbo Westdahl
Campi Flegrei Guntur Kuchinoerabujima Okataina Sinabung Whakaari/White Island
Campi Flegrei del Mar di Sicilia Hachijojima Kurikomayama Okmok Sinarka Witori
Cayambe Hakoneyama Kusatsu-Shiranesan Ontakesan Siple Wolf
Chachadake [Tiatia] Heard Kverkfjoll Oraefajokull Sirung Wrangell
Chaiten Hekla La Palma Osorno Slamet Yakedake
Chiginagak Helgrindur Lamington Pacaya Snaefellsjokull Yasur
Chikurachki Hierro Lamongan Pagan Soputan Yellowstone
Chiles-Cerro Negro Hokkaido-Komagatake Langila Palena Volcanic Group Sorikmarapi Yufu-Tsurumi
Chillan, Nevados de Home Reef Lanin Paluweh Sotara Zaozan [Zaosan]
Chirinkotan Hood Lascar Panarea Soufriere Hills Zavodovski
Chirpoi Huaynaputina Late Papandayan Soufriere St. Vincent Zhupanovsky
Ciremai Hudson, Cerro Lateiki Pavlof South Sarigan Seamount Zubair Group
Cleveland Huila, Nevado del Lengai, Ol Doinyo Pelee Spurr
Colima Hunga Tonga-Hunga Ha'apai Leroboleng Peuet Sague St. Helens
Colo Ibu Lewotobi Pinatubo Stromboli
Concepcion Ijen Lewotolok Planchon-Peteroa Sulu Range
Copahue Iliamna Little Sitkin Poas Sumbing
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A Google Earth network link for the Weekly Volcanic Activity Report can be loaded into the free Google Earth software, and in turn will load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano profile page and to the complete Weekly Report for that week. This feature was first made available on 1 April 2009.

 Criteria & Disclaimers

Criteria



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.

Disclaimers



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.

Some of the documents on this server may contain live references (or pointers) to information created and maintained by other organizations. Please note that USGS does not control and cannot guarantee the relevance, timeliness, or accuracy of these outside materials.

For site security purposes and to ensure that this service remains available to all users, this government computer system employs software programs to monitor network traffic to identify unauthorized attempts to upload or change information, or otherwise cause damage. Unauthorized attempts to upload information or change information on this website are strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act. Information may also be used for authorized law enforcement investigations. (Last modified September 21, 1999.)

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)

Report for Ahyi
On 20 November the Aviation Color Code for Ahyi Seamount was raised to Yellow (the second lowest level on a four-color scale) and the Volcano Alert Level was raised to Advisory (the second lowest level on a four-level scale) due to an ongoing submarine eruption. Plumes of discolored water were observed extending as far as several hundred meters away from the volcano in satellite images on 1, 10, and 19 November. Retrospective analysis of older satellite data revealed minor activity extending back to 5 August. Possible pumice floating on the ocean surface was identified in the most recent image. No volcanic activity was identified in data from underwater pressure sensors near Wake Island (about 2,270 km E of Ahyi), though submarine plumes had been observed in the past without clear hydroacoustic signals.
Source: US Geological Survey
Report for Iya
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that white-and-gray emissions at Iya rose as high as 300 m above the crater rim and drifted NE, N, W, and SW during 13-14 November. White plumes rose 100-300 m above the crater rim and drifted in multiple directions during the rest of the week. The Alert Level remained at 3 (on a scale of 1-4) and the public was warned to stay 3 km away from the active crater area in all directions and 5 km away to the south.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Kanlaon
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported continuing unrest at Kanlaon during 13-19 November. The seismic network recorded 3-13 daily volcanic earthquakes, and sulfur dioxide emissions ranged from 4,246 to 7,818 tonnes per day. Daily moderate-to-voluminous gas emissions with intermittent ash rose as high as 1 km above the summit and drifted several directions. During 15-17 and 19 November there were 4-6 daily ash emission events, each lasting as short as 2 minutes and as long as one hour and 43 minutes. The Alert Level remained at 2 (on a scale of 0-5) and PHIVOLCS reminded the public to remain outside of the 4-km-radius Permanent Danger Zone and warned pilots not to fly close to the volcano.
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Report for Karangetang
Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that white emissions that were sometimes dense rose 50-400 m above Karangetang’s summit during 13-19 November. The Alert Level remained at 3 (on a scale of 1-4) and the public was advised to stay 2.5 km away from Kawah Dua (North Crater) and the Main Crater (South Crater) with an extension to 3.5 km along the W, SW, S, and SE flanks.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Lewotobi
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that eruptive activity at Lewotobi Laki-laki remained at a high-level during 13-19 November, producing ash plumes, lava fountaining, and an advancing lava flow on the W flank, and continued to impact residents and transportation. Daily white-and-gray ash plumes rose as high as 2.5 km above the summit and drifted SW, W, and NW. According to the Darwin VAAC ash plumes rose 2.4-4.6 km (8,000-15,000 ft) a.s.l. during 13-16 November, or with maximum above-summit heights of 2.9 km on 13 November and 2.6 km during 14-16 November.

Webcam images captured during dark hours throughout the week often showed summit incandescence. A webcam image from 0013 on 15 November captured either tall lava fountaining or the explosion of incandescent material high above the summit, and incandescent material descending the upper flanks. A webcam image from 0018 on 17 November showed areas of incandescence on the distal part of the W flank lava flow. The flow advance towards Klatanlo Village (3 km NW) based on a drone overflight later that day. According to a news article BNPB stated that residents from Klatanlo Village will not be permitted to return to their homes due to unsafe conditions and will be relocated. The village will also be prone to potential lahars. Residents were prohibited within a radius of 7 km from the center of Laki-laki, though on 18 November the extended zone on the SW, W, and NW flanks was reduced to 8 km. Loud rumbling was reported on 19 November.

News articles noted that multiple domestic and international flights in and out of Lombok Airport were cancelled or rerouted on 13 November mainly due to ash from the 9-km-high ash plume produced on 12 November. The Komodo International Airport (313 km W), Frans Xavier Seda Airport (252 km W), H. Hasan Aroeboesman Airport (126 km WSW), and the Soa Airport (190 km W) remained closed, and tourists and residents continued to be moved to other islands by boat. On 14 November the Gusti Ngurah Rai International Airport (840 km W) cancelled 41 domestic and international flights. As of 2000 on 15 November a total of 6,388 evacuees remained in evacuation shelters across six locations. By 18 November almost all airports had returned to normal operations; the Frans Xavier Seda Airport remained closed.
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Antara News, Antara News, Antara News, Antara News, Antara News, Antara News, Antara News, Antara News
Report for Lokon-Empung
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported continuing unrest at Lokon-Empung during 13-19 November. Daily white emissions rose as high as 20 m above the summit and drifted multiple directions. The Alert Level remained at 3 (on a scale of 1-4) and the public was warned to stay 3 km away from the crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Marapi
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that unrest at Marapi (on Sumatra) was ongoing during 13-19 November. No emissions were observed during 13-15 November possibly due to weather clouds obscuring views. White emissions were observed rising 100-300 m above the crater rim and drifting in multiple directions during 16-17 November. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay 4.5 km away from the active crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Sheveluch
The Kamchatkan Volcanic Eruption Response Team (KVERT) reported that lava extrusion continued at Sheveluch’s “300 years of RAS” (Karan) dome on the SW flank of Old Sheveluch and at the dome at Young Sheveluch through 14 November. Ash plumes generated from a strong explosive eruption during 7-8 November and continuing activity at the lava domes during 9-10 November drifted as far as 1,200 km E and SE. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Aira
The Japan Meteorological Agency (JMA) reported ongoing eruptive activity at Minamidake Crater (Aira Caldera’s Sakurajima volcano) during 4-11 November. Nightly crater incandescence was visible in webcam images and very small eruptive events were periodically recorded. An explosion at 0422 on 18 November generated an ash plume that rose 700 m above the crater rim and drifted SE. The Alert Level remained at 3 (on a 5-level scale), and the public was warned to stay 1 km away from both craters.
Source: Japan Meteorological Agency (JMA)
Report for Dukono
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Dukono was ongoing during 13-19 November. Gray-and-white ash plumes that were sometimes dense rose 100-700 m above the summit; the plumes drifted NW, W, and SW during 13-15 and 18 November. Emissions were not observed during 16-17 November. The Alert Level remained at Level 2 (on a scale of 1-4), and the public was warned to remain outside of the 3-km exclusion zone.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Great Sitkin
The Alaska Volcano Observatory (AVO) reported that slow lava effusion continued to feed a thick lava flow in Great Sitkin’s summit crater during 13-19 November. The lava flow had filled most of the summit crater with minor advancement in the N part of the E lobe. The local seismic network continued to detect small earthquakes associated with the ongoing eruption. The last radar image, acquired on 14 November, confirmed ongoing effusion. Weather clouds obscured webcam and satellite views of the summit most of the week, though during 17-18 November elevated surface temperatures over the summit and diffuse steam plumes were identified in satellite images. The Volcano Alert Level remained at Watch (the third level on a four-level scale) and the Aviation Color Code remained at Orange (the third color on a four-color scale).
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Ibu
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity at Ibu continued during 13-19 November. Daily gray or white-and-gray ash plumes that were often dense rose as high as 3 km above the summit and drifted in multiple directions. Some webcam images posted with the reports showed incandescence visible above the crater rim. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Karymsky
The Kamchatkan Volcanic Eruption Response Team (KVERT) reported moderate levels of activity at Karymsky during 8-14 November. A thermal anomaly over the volcano was identified in satellite images during the week and ash plumes drifted E and SE on 8 and 12 November. The Aviation Color Code remained at Orange (the third level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Katmai
The Alaska Volcano Observatory (AVO) reported that on 17 November strong winds in the vicinity of Katmai and the Valley of Ten Thousand Smokes dispersed unconsolidated ash up to 1.8 km (6,000 ft) a.s.l. to the SE. The ash was originally deposited during the Novarupta-Katmai eruption in 1912. The Volcano Alert Level remained at Normal (the lowest level on a four-level scale) and the Aviation Color Code remained at Green (the lowest level on a four-color scale).
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Manam
The Darwin VAAC reported that at 0900 on 15 November an ash plume from Manam was identified in satellite images rising to 2.1 km (7,000 ft) a.s.l. and drifting NW. The plume had dissipated by 1100 on 16 November. A period of continuous ash emissions was identified in satellite images during 0430-1730 on 17 November. Weather clouds and darkness obscured views through the night but by 0920 on 18 November the ash plumes were no longer visible and had dissipated.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Popocatepetl
Centro Nacional de Prevención de Desastres (CENAPRED) reported that eruptive activity continued at Popocatépetl during 12-19 November. The seismic network recorded 11-52 long-period events per day that were accompanied by steam-and-gas emissions sometimes containing minor amounts of ash. The seismic network also recorded daily tremor, characterized at high-frequency and low-to-moderate amplitude, with periods lasting four hours and 54 minutes to as long as eight hours and five minutes. According to the Washington VAAC ash plumes were visible in webcam and satellite images during 13-16 November rising 5.8-7 km (19,000-23,000 ft) a.s.l. and drifting mostly SW, W, and NW and occasionally N and NNE. The Alert Level remained at Yellow, Phase Two (the middle level on a three-color scale) and the public was warned to stay 12 km away from the crater.
Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), Washington Volcanic Ash Advisory Center (VAAC)
Report for Reventador
Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that an eruption at Reventador was ongoing during 12-19 November. Seismicity was characterized by 66-101 daily explosions, long-period earthquakes, harmonic tremor, and tremor associated with emissions. Daily or near-daily ash-and-gas plumes were observed in webcam images and/or satellite images rising 200-1,200 m above the crater and drifted in different directions. Incandescent material was observed nightly descending the flanks as far as 1 km below the crater rim. Weather conditions sometimes obscured views, especially on 16 November. Secretaría de Gestión de Riesgos maintained the Alert Level at Orange (the second highest level on a four-color scale).
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN), Secretaría de Gestión de Riesgos (SGR)
Report for Sabancaya
Instituto Geofísico del Perú (IGP) reported that the eruption at Sabancaya continued during 11-17 November with a daily average of nine explosions. Gas-and-ash plumes rose as high as 1.4 km above the summit and drifted less than 10 km NW, W, and SW. Thermal anomalies over the lava dome in the summit crater were identified in satellite data. Slight inflation was detected N of Hualca Hualca (7 km N). Sulfur dioxide emissions were at moderate levels, averaging 551 tons per day. The Alert Level remained at Orange (the third level on a four-color scale) and the public was warned to stay outside of a 12 km radius from the summit.
Source: Instituto Geofísico del Perú (IGP)
Report for Sangay
Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that eruptive activity continued at Sangay during 12-19 November. The seismic network recorded 12-41 daily explosions; during 13-14 November there were 376 explosions detected. Gas-and-ash plumes visible in webcam and/or satellite images rose 400-1,200 m above the summit and drifted E, SW, and W during 12-15 November. Weather clouds often obscured views of the volcano. Secretaría de Gestión de Riesgos (SGR) maintained the Alert Level at Yellow (the second highest level on a four-color scale).
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN), Secretaría de Gestión de Riesgos (SGR)
Report for Santa Maria
Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH) reported ongoing eruptive activity at Santa Maria’s Santiaguito dome complex during 12-19 November with continuing lava extrusion at Caliente dome. Daily explosions (a few per hour) generated gas-and-ash plumes that rose as high as 900 m above the dome and drifted in several directions; cloudy weather during 17-18 November prevented visual observations, though explosions and avalanches were heard. Effusion of blocky lava and collapses of material produced block avalanches that descended the SE, S, and SW flanks. Collapsed material produced short pyroclastic flows during 14-16 November. Incandescence was sometimes visible during dark hours from avalanches of material at the dome as well as explosions. Ashfall was reported in areas downwind during 15-16 November including San Marcos (8 km SW), Lome Linda Palajunoj (7 km SW), Las Marías (10 km S), Calaguaché (9 km S), and Belén (10 km S). On 19 November ashfall was reported in Santa María de Jesús (5 km SE), La Muralla (8 km ENE), Zunil (10 km NE), and surrounding areas.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Semeru
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that eruptive activity continued at Semeru during 13-19 November with several daily eruptive events recorded by the seismic network. Daily white-and-gray ash plumes that were sometimes dense rose 300-700 m above the summit and drifted S and SW. Weather conditions sometimes prevented views of the summit. The Alert Level remained at 2 (the second lowest level on a scale of 1-4). The public was warned to stay at least 5 km away from the summit in all directions, 13 km from the summit to the SE, 500 m from the banks of the Kobokan drainage as far as 17 km from the summit, and to avoid other drainages including the Bang, Kembar, and Sat, due to lahar, avalanche, and pyroclastic flow hazards.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Suwanosejima
The Japan Meteorological Agency (JMA) reported that eruptive activity at Suwanosejima's Ontake Crater continued during 11-18 November. Crater incandescence was observed nightly in webcam images. A period of continuous ash emissions during 0107-0200 on 16 November produced ash plumes that rose as high as 1.5 km above the crater rim. An explosion was recorded at 1127 and produced ash emissions that rose 300 m above the crater rim and entered weather clouds. Ash emissions continued, rising as high as 1.1 km above the cater rim, and ceased at 1344. An eruptive event at 1542 on 16 November generated an ash plume that rose 1 km above the crater rim and drifted W. An explosion at 1619 generated an ash plume that rose 1.5 km above the crater rim and drifted W. No emissions were described from and explosion at 1920. Ashfall was occasionally observed within a 1.5-km-radius according to the Suwanosejima Branch of the Toshima Village Office (3.5 km SSW). The Alert Level remained at 2 (on a 5-level scale) and the public was warned to stay at least 1.5 km away from the crater.
Source: Japan Meteorological Agency (JMA)